SUSPENDED SEDIMENT
IN THE CHESAPEAKE
AND DELAWARE CANAL
J.R. SCHUBEL
A.D. WILLIAMS
W.M.WISE
U.S. Envirwrawtal
fegiOR HI
Center (3PM52)
841 Chestnut Street
SPECIAL REPORT 11
REFERENCE 77-7
EPA Report Collection
Information Resource Center
US EPA Region 3
Philadelphia, PA 19107
-------
MARINE SCIENCES RESEARCH CENTER
STATE UNIVERSITY OF NEW YORK
STONY BROOK, NEW YORK 11794
SUSPENDED SEDIMENT IN THE
CHESAPEAKE AND DELAWARE CANAL
J. R. Schubel
A. D. Williams
W. M. Wise
October 1977
U.S. Environmental Protection Agency
Region III Information Resource
Car.br (3PM52)
81! Chasinut Street
hia, PA 19107
Special Report 11
Reference 77-7
Approved for Distribution
J. R. Schubel, Director
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TABLE OF CONTENTS
Page
LIST OF FIGURES ii
LIST OF TABLES iii
ACKNOWLEDGEMENTS iv
INTRODUCTION . 1
THE CHESAPEAKE AND DELAWARE CANAL: AN HISTORICAL PERSPECTIVE 1
HYDROGRAPHY OF THE CHESAPEAKE AND DELAWARE CANAL 6
DISTRIBUTION OF SUSPENDED SEDIMENT, TEMPERATURE AND SALINITY 8
Introduction 8
Methods 9
Suspended Sediment 9
Salinity and Temperature 9
Weather 10
Time 10
The Observations 10
Suspended Sediment 10
Observations During Dredging 16
SOME COMMENTS ON FISH EGGS AND LARVAE IN THE CANAL AND THE EFFECTS OF SUSPENDED
SEDIMENT ON THEIR SURVIVAL AND DEVELOPMENT 16
Fish Eggs and Larvae 16
Striped Bass Spawning, Eggs, and Larvae in the C & D Canal 18
White Perch Spawning, Eggs, and Larvae in the C & D Canal 19
Effects of Suspended Sediment Concentrations Characteristic of the Canal on
Fish Eggs and Larvae 19
Review of Literature on Effects of Suspended Sediment on Fish Eggs and Larvae . 20
Effects of Suspended Sediment on Hatching Success of Fish Eggs 21
Effects of Suspended Sediment on Rates of Fish Egg Development 23
Effects of Suspended Sediment on Fish Larvae 24
Summary 27
LITERATURE CITED 28
APPENDIX A 30
-------
LIST OF FIGURES
Figure Page
1 Regional setting 1
2 Upper and lower Canal routes (from Gray, 1967) 2
3 Volume of improvement dredging in Chesapeake and Delaware Canal,
1921-1976 5
4 Volume of maintenance dredging in Chesapeake and Delaware Canal,
1921-1976 5
5 Volume of maintenance dredging in Chesapeake and Delaware Canal,
1928-1972, by five-year rolling average 6
6 Chart of Chesapeake and Delaware Canal showing location of temperature,
salinity and suspended sediment stations 8
7 Distribution of suspended sediment (mg/S,) on 11 March 1971 11
8 Distribution of suspended sediment (mg/S,) on 23 March 1971 11
9 Distribution of suspended sediment (mg/i) on 25 March 1971 11
10 Distribution of suspended sediment (mg/i) on 30 March 1971 12
11 Distribution of suspended sediment (mg/i) on 18 August 1971 12
12 Distribution of suspended sediment (mg/i) on 27 August 1971 12
13 Distribution of suspended sediment (mg/i) on 30 August 1971 13
14 Distribution of suspended sediment (mg/i) on 8 September 1971 13
15 Distribution of suspended sediment (mg/£) on 19 October 1971 13
16 Distribution of suspended sediment (mg/i.) on 16 November 1971 14
17 Distribution of suspended sediment (mg/i.) on 14 December 1971 14
18 Distribution of suspended sediment (mg/s.) on 27 January 1972 14
19 Distribution of suspended sediment (mg/S.) on 28 February 1972 15
20 Distribution of suspended sediment (mg/i) on 14 February 1973 15
21 Distribution of suspended sediment (mg/J,) on 5 October 1976. The
bottom topography indicated in the figure has not been corrected for
removal of the "plug" in the eastern end of the Canal which was
completed in March 1975 15
22 Spillway, showing discharge entering north side of the Canal 16
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LIST OF TABLES
Table Page
1 Cruise Summary: Cruise Number; Date; Direction, and Stage of Tidal Current
For Each of the Cruises 9
2 Summary of Suspended Sediment Observations During Dredging on 20-21 May
1971 17
3 Average Suspended Sediment Concentrations (mg/Z) Observed in March 1971 . . 20
4 Minimum and (Maximum) Suspended Sediment Concentrations (mg/£) Observed in
1971 21
5 Delay in Hatching of Eggs Incubated in Suspensions of Natural Fine-Grained
Sediments 23
6 Effects of Suspended Sediment on Mortality of Fish Larvae 24
7 Effects of Suspended Sediment on Mortality of Fish Larvae 25
8 Effects of Suspended Sediment on Mortality of Fish Larvae 26
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ACKNOWLEDGEMENTS
We are indebted to C. H. Morrow, G. M. Schmidt, and T. \-~. Kana for assisting in the
collection of data, to H. H. Carter for information on hydrography, to Carol-Lee Igoe and
Virginia Sewell for typing the report, and to Carol Cassidy for drafting the figures.
Partial support for the data collection program was provided by a project jointly
funded by the Fish and Wildlife Administration of the State of Maryland, and the National
Marine Fisheries Service, Department of Commerce, through Public Law 89-304 funds.
Preparation of the report was supported by the Chesapeake Bay Program, Environmental
Protection Agency, Region III; and the Rockefeller Foundation.
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INTRODUCTION
THE CHESAPEAKE AND DELAWARE CANAL:
AN HISTORICAL PERSPECTIVE
From March 1971 through February 1972
the senior author collected samples of
suspended sediment at a series of stations
along the axis of the Chesapeake and
Delaware Canal. On each cruise several
stations were also occupied in the
approaches to the Canal in the Chesapeake
Bay and in the Delaware Bay. The collec-
tion program was done in conjunction with
studies by Pritchard and Gardner (1974) .
The primary purposes of this report
are: to briefly review the dredging his-
tory of the Chesapeake and Delaware Canal,
to summarize our suspended sediment obser-
vations in tabular and graphical form, and
to assess the biological implications of
the observed suspended sediment distribu-
tion patterns.
The idea of building a canal across
the upper Delmarva Peninsula dates to the
17th century. Early colonists realized
the potential advantages to connecting of
Delaware and Chesapeake Bays by a canal
between peninsular streams, separated in
places by no more than a few miles of
relatively flat land, Fig. 1. It was not
until the mid-18th century, however, that
the idea was taken seriously, and forma-
tion of a concerted movement to sponsor
the project in the legislatures of
Maryland, Pennsylvania and Delaware was
delayed until the end of the century.
In 1802 the Chesapeake and Delaware
Canal Company was organized. Construction
of the Canal began in 1804. The route
chosen was supposed to run from the Elk
River towards Christiana, Delaware, ending
either at the Delaware or Christian
Rivers, Fig. 2. Construction began at the
Philadelphia«|-Camden
Wilmrngjomiff/
Md.
Washington
Richmond
Fig. 1. Regional setting.
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western entrance at Welsh Point on the Elk
River. The Canal Company ran out of money
in 1805, with only portions of the western
section completed. For the next twenty
years no work was performed. The Federal
government was persuaded to provide finan-
cial aid in the 1820's through purchasing
a large number of shares of the Company.
Construction resumed in 1824, but with a
change of route.
The Canal was now to run from the
Delaware River at Newbold's Landing
through to Back Creek with a tide lock at
the mouth of Long Creek, Fig. 2. Total
length of the Canal was to be 13.6 mi.
with two tide and two lift locks. The
original dimensions of the project called
for the Canal to be 66 ft. wide at the top
of the channel, 36 ft. wide at the bottom
of the channel, and 10 ft. deep. Passing
places were to be constructed at half-mile
intervals except in the "Deep Cut" section
(the Summit region) where they were spaced
one mile apart. A harbor was constructed
at Newbold's Landing, later renamed
Delaware City. The dimensions of the
locks were 100 ft. long by 22 ft. wide
(Gray, 1967) .
The Chesapeake and Delaware Canal was
opened in 1829. Because of the enormous
expense of the construction ($165,000/mi.
versus $19,000/mi. for the Erie Canal),
protracted delays in raising money, and
conflicts over management, the Canal
Company was in serious financial
difficulties before the waterway opened
for business.
The Canal was an immediate success as
a freight carrier. The new route, which
shortened the trip to Philadelphia by
about 300 mi., enabled towboat and later
steamboat lines to develop in the upper
Chesapeake Bay - Susquehanna Valley
region. Most of the traffic using the
Canal went from west to east, carrying
freight primarily to Philadelphia.
As early as the 1830's the Company
encountered difficulties in maintaining
Pennsylvanio
Fig. 2. Upper and lower Canal routes (from Gray, 1967)
-------
the Canal. Landslides from unstaole sides
of the channel were a continual problem,
and the Company purchased its first dredge
to remove shoals during this period. The
Company, always barely solvent, was rarely
able to secure funds for channel and lock
maintenance. This exacerbated the fact
that the dimensions of the Canal were out-
dated soon after it opened. Improvement
of the Canal to accommodate increasingly
larger vessels was beyond the resources of
the Company. The sometimes unnavigable
conditions diverted a significant amount
of traffic away from the route. Steam-
boats occasionally were barred because of
the damage they caused to the sides of the
channel.
A direct rail route, running parallel
to the Canal, between Baltimore and
Philadelphia, was completed in the 1840's.
Competition for freight and passengers by
this line cut the Company's revenues
substantially. This in turn reduced the
Company's ability to maintain the channel
in order to compete successfully with the
railroad. This competition was the
ultimate downfall of the Canal Company and
eventually led to its purchase by the
Federal government.
The first improvements to the Canal
were suggested in the 1840's. All that
was accomplished, however, was enlargement
of the locks, the size of which effec-
tively limited the size of vessels using
the route. Because of a perpetual lack of
money, no significant improvement work was
ever performed on the Canal while under
private ownership.
Most inland waterways carried peak
tonnages during the 1850's, and by the
1870's all but the best situated were in
decline. Railroads were the backbone of
commercial transportation, and popular
support for Canal improvements was small.
The Chesapeake and Delaware Canal carried
its greatest tonnages in the 1870's, after
which business declined until Federal
improvements were made.
The necessity of an adequate ship
channel through the peninsula was, how-
ever, never clearer than during the Civil
War and in the years to follow. The C & D
Canal proved vital to the survival of
Washington, D. C. because rail routes to
the Capital led through pro-southern
cities, such as Baltimore. President
Lincoln later declared that the Canal had
saved the Union.
The depression which followed the war
sealed the fate of the Canal as a private
enterprise. V.'hile the commercial traffic
through Baltimore and its Port grew
rapidly, traffic through the Canal contin-
ued tc decline. Although more than 80% of
the traffic on the Canal during the 1880's
was eastbound, most of the important
traffic from Baltimore, especially the
larger barges carrying coal and grains,
was forced to travel around the coast to
reach other cities and foreign ports.
Southern commercial shipping inter-
ests began to demand a sea level ship
canal through the peninsula in the 1870's.
This for the most part reflected the
growth of Baltimore as an export point to
foreign countries. Expectation that
either private interests or the Federal
government would construct a 30 - 35 mi.
long canal, through a more southern region
of the peninsula, discouraged considera-
tions of improving the C & D Canal after
the 1870's.
Investigations and surveys for the
new Canal went on for decades. It was
ultimately realized that use of the
Chesapeake and Delaware Canal would depend
mainly on traffic through the Port of
Baltimore. Thus the more southern and
lengthy of the proposed routes were
eliminated. This realization reawakened
interest in the possibility of Federal
improvement of the C & D Canal. This had
been proposed many times in the 19th
century, as the military importance of the
Canal had been established, and as the
Federal government was a major shareholder
of the Company. Purchase of the Canal by
the Federal government finally occurred in
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1919.
The Canal had deteriorated badly in
the years preceding its purchase. Up to
1919 it was capable only of transporting
vessels with 750 tons cargo, about half
the capacity of the modern vessels in use
at that time. A great deal of maintenance
and preliminary work was required before
large scale improvement began in 1922.
The dimensions of the Canal as a federal
project called for the Canal to be 12 ft.
deep at mean low water, and 90 ft. wide at
the bottom. A new eastern entrance to the
Canal was designated at Reedy Pt.,
Delaware, 2 mi. south of the entrance at
Delaware City.
Conversion to a lockless sea level
Canal was not made immediately. The
enlargement as noted above was made as an
interim step to the final construction.
The locks were removed in 1927, completing
the transition to a sea level Canal. Over
16,000,000 yds.3 of material were
excavated for this initial improvement.
The second major congressional
authorization for further improvements
occurred in 1935. New project dimensions
stipulated a channel 27 ft. deep and 250
ft. wide from Delaware River to the Elk
River, with a 400 ft. wide channel to deep
water near Pooles Island in Chesapeake
Bay. The dimensions of the Delaware City
Branch Channel {the original eastern ter-
minus) were set at 8 ft. deep and 50 ft.
wide. Other improvements were authorized
for enlargement of anchorages and basins
at both ends of the Canal.
Work to complete these improvements
continued until 1941. Approximately
35,000,000 yds.3 of material were removed
from the Canal. Most dredging was
accomplished by pipeline dredge. During
this work sides were reduced in slope
and stabilized, thus reducing somewhat the
persistent problem of slippage into the
Canal. Extensive work was done on bank
stabilization in the 1940's, requiring dry
excavation of 4,000,000 yds.3 of earth and
installation of miles of drainage pipes
and over 50,000 tons of riprap. The
continual problem of shoaling at the Reedy
Point entrance was alleviated in 1942 by
extension of a jetty.
Improvement work on the 25 mi. long
approach channel in Chesapeake Bay began
in 1936. Hopper dredges were used to dig
a channel 27 ft. deep by 400 ft. wide.
This work continued until 1938 and pro-
duced over 24,000,000 yds.3 of spoil which
was deposited in diked areas next to
Pearce Creek.
The last improvements we're authorized
by Congress in 1954. These included the
deepening of the channel to 35 ft. at mean
low water and widening the bottom of the
channel to 450 ft. Other improvements
authorized pertained to bridges and
increasing the radius of curvature at all
bends to not less than 7,000 ft. A new
cut-off channel was specified at the
Lorewood section of the Canal.
Dredging under this authorization did
not begin until 1962. By 1970 when
enlargement was about 80% completed,
substantial concerns were expressed by a
variety of groups on possible deleterious
effects of enlargement: on the net trans-
port of water through the Canal, on
velocities and turbulence within the
Canal, on the salinity regime of the upper
Chesapeake Bay, on the biological popula-
tions of the Canal and contiguous regions,
and on the environment of the? upper
Chesapeake Bay. A series of extensive
field and laboratory studies was initiated
to assess the environmental and biological
effects of enlargement (Chesapeake
Biological Laboratory et al., 1972 and
Appendices), and dredging of the east end
of the Canal was restricted, leaving a
"plug". The "plug" was to be completely
removed only if the studies demonstrated
that the effects of the proposed enlarge-
ment would be "acceptable" (Cronin et al.,
1977). Removal of the "plug" was
completed in F"arch of 1975. Between 1962
and 1975, over 50,000,000 yds.3 of mater-
ial were removed for improvement work from
-------
all project areas, almost all of it by
hydraulic pipeline dredge. The material
was disposed of on fastlands bordering the
Canal. The amount of material dredged for
improvement (new work) between 1919 and
1976 is summarized in Fig. 3.
The amount of material dredged for
maintenance purposes since 1919 is illus-
trated in Fig. 4. Almost all maintenance
work done in the Canal has been performed
by hopper dredges, and the spoil has been
deposited on adjacent land and behind
30
CO
0
a:
o 20
CD
O
O
U_
O
10
z
o
0
1920
\X* I
1930
1940
1950
I960
1970
1980
Fig. 3. Volume of improvement dredging in Chesapeake and Delaware Canal, 1921-1976.
3.0
co
o
ce
o 2.0
m
o
u.
o
co 1.0
z
o
1920
1930
1940
1950
I960
1970
I960
Fig. 4. Volume of maintenance dredging in Chesapeake and Delaware Canal, 1921-1976.
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diked disposal areas. During the Federal
fiscal years 1942 - 1961, inclusive, a
period when no improvement dredging was
done, approximately 800,000 yds.3 were
dredged yearly for maintenance work from
all areas of the project. From 1962 to
1975, inclusive, over which time improve-
ment dredging was almost constantly in
progress, the average yearly amount of
material removed for maintenance was about
650,000 yds.3 A graph of yearly mainten-
ance dredging by five-year rolling average
is presented in Fig. 5. It is clear that
the increased dimensions of the Canal and
approach channel have added significantly
to maintenance dredging requirements.
British Engineering Units are used in
this section to conform with standard
engineering practice.
HYDROGRAPHY OF THE CHESAPEAKE
AND DELAWARE CANAL
The Chesapeake and Delaware Canal is
a man-made, sea level waterway connecting
two tidal bodies of water, Delaware Bay
en
o
tt
1.75
1.50
1.25
E "-00
o
u.
o
V)
o
0.75
Q50
0.25
1920
1930
1940
1950
I960
1970
I960
Fig. 5. Volume of maintenance dredging in Chesapeake and Delaware Ccinal, 1928-1972,
by five-year rolling average.
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and Chesapeake Bay. The eastern terminus
at Reedy Point is approximately 70 km
south of Philadelphia and 110 km above the
entrance to Delaware Bay at Cape Henlopen-
Cape May. The Canal's connection with
Chesapeake Bay to the west is generally
considered to be at the mouth of the Elk
River, approximately 55 km north of
Baltimore and 340 km north of the entrance
to Chesapeake Bay at Cape Charles,
Virginia.
The tides in the C & D Canal are not
independent tides but are forced oscilla-
tions of periods which are determined by
the phasing and amplitudes of the impulses
which maintain themthe tidal waves that
have ascended the Delaware and Chesapeake
Bays from the ocean. The phasing and
amplitudes of these two forcing functions
are largely determined by the following
geographic features. First, the distance
from the mouth of Chesapeake Bay to the
western end of the Canal is much greater
than from the mouth of the Delaware Bay to
the eastern end of the Canal. Second,
Delaware Bay is funnel shaped whereas
Chesapeake Bay is longer, dendritic, and
shoaler. As a result, the amplitude of
the tidal wave in Chesapeake Bay is
reduced from about 85 cm to 67 cm at the
western end of the Canal whereas in
Delaware Bay the amplitude increases from
128 cm to about 158 cm at Reedy Point. In
addition, the highs and lows of the tide
derived from the same oceanic tide arrive
at Courthouse Point approximately 10 hours
(Pritchard and Gardner, 1974) later than at
Reedy Point. This results in an interest-
ing complication in the Canal's tidal
regimen. Because a given tide at
Courthouse Point approximately phases with
the succeeding tide at Reedy Point, higher
highs occur at Courthouse Point at approx-
imately the same time as lower highs at
Reedy Point. Similarly, lower highs,
lower lows, and higher lows at Courthouse
Point correspond approximately to higher
highs, higher lows, and lower lows at
Reedy Point. In addition to this variable
height relationship, there are also varia-
tions in the lunitidal intervals, i.e.,
the time difference between the meridian
passages of the moon and the next high or
low water.
As a result, flows in the Canal are
highly variable over a wide range of time
scales. According to Pritchard et al.
(1974), instantaneous maximum transports
ranged from 2,265 m3/sec to about 2,830
m3/sec during March and August of 1971,
and April of 1972. Net non-tidal trans-
port, i.e., the transport averaged over a
single tidal cycle, commonly exceeded 565
m3/sec and was just as apt to be easterly
as westerly. The long-term net trans-
port, however, was easterly although the
magnitude was highly dependent on the
averaging period. Maximum surface current
velocities may approach 2.6 m/sec (5
knots) in extreme instances. Normal maxi-
mum surface velocities are about 1.1 m/sec
(2.2 knots), while maximum bottom current
velocities are about 0.9 m/sec (1.8
knots).
Rives (1977, in press) has shown that
the net non-tidal transports in the Canal
can be considered as hydraulically driven.
According to Rives, in spite of the
complicated characteristics of the tides
at the ends of the Canal, the difference
in elevation between the ends of the Canal
and the non-tidal transport (both averaged
over a single tidal cycle) are linearly
related. This linear regression as
calculated by Rives has a small intercept.
That is, at zero elevation difference
there is a small westward transport or, to
put it another way, at zero transport
there is a small west to east slope in sea
level along the Canal. T. O. Najarian
(personal communication) believes this
intercept is real and probably related to
the higher salinities in Delaware Bay off
Reedy Point as compared to the Elk River.
There are also flow variations in the
Canal due to meteorological effects. The
passage of storms or pressure systems over
the region can produce water level changes
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and thus currents. Such effects would be
included in Rives' (1977) regression of
elevation difference on net non-tidal
transports.
The salinity distribution in the
Canal is determined by the salinity in the
Chesapeake and Delaware estuaries and the
currents through the Canal. The lower
salinities in Chesapeake Bay (Elk River)
near the western end of the Canal as com-
pared to those off Reedy Point in Delaware
Bay, previously described as being
primarily responsible for the small net
non-tidal flow from east to west at zero
elevation difference across the Canal, are
due to the close proximity of the
Susquehanna River to the mouth of the Elk
River. According to Pritchard and Gardner
(1974), the monthly average salinity
difference ranges from 0.5°/00in January
to approximately 3.0°/o<> in October and
November. Within the Canal the salinity
distribution is controlled by the action
of the currents (which are highly
variable) on the salinities at the Canal
boundaries. At times the current flows
long enough and strong enough to replace
the water in the Canal with either
Delaware Bay water or Susquehanna River -
Elk River water.
DISTRIBUTIONS OF SUSPENDED SEDIMENT,
TEMPERATURE AND SALINITY
From 11 March 1971 through 28
February 1972 thirteen cruises were made
through the Chesapeake and Delaware Canal.
Two additional cruises were made since
then; one on 14 February 1973, the second
on 5 October 1976. On each of these
cruises data were taken at 12 - 14
stations located within the Canal and in
adjacent areas of the' upper Chesapeake Bay
and Delaware Bay, Fig. 6. Measurements
were made of temperature, electrical
conductivity (salinity) and the concentra-
tion of suspended sediment (total
suspended solids).
The cruises were made as near the
time of slack water as possible. Cruises
made west to east were usually on slack
before flood (eastward flowing current),
and cruises east to west were usually on
slack before ebb (westward flowing
Fig. 6. Chart of Chesapeake and Delaware Canal showing location of temperature,
salinity and suspended sediment stations.
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current). The dates of the cruises, the
directions in which the sections were made
and the phase of the tide are summarized
in Table 1.
Methods
Suspended Sediment
The concentrations of suspended
sediment (total suspended solids) were
determined by filtration of measured vol-
umes of water (generally 500 ml) through
pre-weighed 0.6 urn average pore diameter
Nuclepore membrane filters. The water
samples were collected with a submersible
pump and were filtered aboard ship. The
filters and their sediment loads were
rinsed several times with distilled water
to remove any sea salt and were placed in
small individual desiccators made from
120 ml (4 ounce) squat form jars (Schubel,
1968). Samples were desiccated over
silica gel at ambient temperature for at
least 72 hours before weighing. All
weighings were made to ± 0.03 mg.
Salinity and Temperature
Salinities were computed from meas-
urements of temperature and electrical
TABLE 1
Cruise Summary: Cruise Number, Date, Direction, and Stage of
Tidal Current For Each of the Cruises.
Cruise
I
2
3
4
5
6
7
8
9
10
11
12
13
Date
11 March 1971
23 March 1971
25 March 1971
30 March 1971
18 August 1971
27 August 1971
30 August 1971
8 September 1971
19 October 1971
16 November 1971
14 December 1971
27 January 1972
28 February 1972
Direction
of Cruise
W -*
E -»
E +
W -+
W -*
W +
W *
W -*
W -<
W -»
W -*
W *
W *
E
W
W
E
E
E
E
E
E
E
E
E
E
Slack
Before
Flood
Ebb
Ebb
Ebb
Flood
Flood
*
Flood
Flood
Flood
Flood
Flood
Flood
14
15*
14 February 1973
5 October 1976
W -> E
Flood
Flood
*Run not made at slack water
-------
conductivity made with a Chesapeake Bay within ± 0.02C. For a complete descrip-
Institute ICTI (induction conductivity tion of the ICTI see Schiemer and
temperature indicator). The computed Pritchard (1961).
salinities have a precision of about Weather
± O.OS^oo an<3 an accuracy of approximately Weather is reported in the following
± O.OS^oo- Temperatures are accurate to code:
Code Description
00 Cloudless (from no clouds up to 1/10 coverage)
01 Partly cloudy (from 1/10 to 5/10)
02 Cloudy (over 5/10 up to 9/10)
03 Overcast (over 9/10)
04 Low fog, on ground or at sea
05 Haze
07 Distant lightning
10 Precipitation within sight
11 Thunder, without precipitation
13 Squally weather
16 Waterspout seen
19 Signs of tropical storm
40 Fog
49 Fog in patches
51 Intermittent drizzle
52 Continuous drizzle
57 Drizzle and fog
58 Drizzle and rain, mixed
61 Intermittent rain
62 Continuous rain
67 Rain and fog
69 Rain and snow, mixed
71 Intermittent snow (in flakes)
72 Continuous snow (in flakes)
77 Snow and fog
78 Frozen drizzle (grains of snow)
79 jce crystals or frozen rain drops
81 Rain showers
83 Snow showers
88 Hail, or rain and hail showers
93 Thunderstorm, with rain (or snow) but without hail
94 Thunderstorm, with hail
97 Heavy thunderstorm
Wind direction is given in degrees true. The Observations
Wd_nd speed is given in knots. Suspended Sediment
Time The suspended sediment observations
All times are Eastern Standard Time. are summarized as longitudinal sections
along the axis of the Canal in Figs. 7-21.
10
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Turkey Point
caps cao4 caps caps cap?
14
I I I h I I I I I I
I 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 IB 19 20 21 22 23 24 25 26 27
DISTANCE IN NAUTICAL MILES
0 5 10 15 20 25 30 35 40 45 50
DISTANCE IN KILOMETERS
Fig. 7. Distribution of suspended sediment (mg/£) on 11 March 1971.
Turkey Point
924 QQ 926JJU.
CSD2 CSDS C8D4 C8D5 C8D6 C8D7 CaDBDELR2
i i i i i i ni
I 2 3 4 5 6 7 8 9 10 I I 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29
DISTANCE IN NAUTICAL MILES -
0 5 10 15 20 25 30 35 40 45 50 55
DISTANCE IN KILOMETERS
Fig. 8. Distribution of suspended sediment (mg/£) on 23 March 1971.
Turkey Point
924 QQ 926 UU
-CHESAPEAKE 8 DELAWARE CANAL-
CSD2 C8.D3 C8D4 CaD5_ C6.D6 C8.D7 CaPS DELR2
I
9 10 I I 12 13 14 15
DISTANCE IN NAUTICAL MILES
20 25 30
D'STANCE IN KILOMETERS
21 22 23
40
24
45
25 26 27 28
50
Fig. 9. Distribution of suspended sediment (mg/£) on 25 March 1971.
11
-------
Turkey Point
924QQ 926UU Old Town Pt C9DI C8.D2 C8.D3 0804 CJ3.D5 C8D6 0807 C60 8 DEL R 2
H^ r^7 1 7l [ i ^ l \\ \ I i/ / / i II II Ml
234567
5
9 10 I I 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29
DISTANCE IN NAUTICAL MILES -
10 5 20 25 30 35 40 45 50 55
D STANCE '. KILOMETERS
Fig. 10. Distribution of suspended sediment (mg/£) on 30 March 1971.
-CHESAPEAKE 8 DELAWARE CANAL
C8.D2 CBD3 C8J24 CaD5,,,CaD6 C807 C3P8
234567
9 10 II 12 13 14 15 16
DISTANCE IN NAUTICAL MILES
20 25 30
DISTANCE IN KILOMETERS
17 18 19 20
^
35
21 22 23 24 25 26
40 45
27 28
50
55
Fig. 11. Distribution of suspended sediment (mg/£) on 18 Rugust 1971.
Turkey Point
924 QQ 926 UU
Old Town PI CaDI
CSD2
-CHESAPEAKE 8 DELAWARE CANAL-
C8D3 C8D4 C8D5 C8D6 CBD7 CaDS'PELRZ
ottom Relative to High Water Surface
2 3 4 5 6 7 8 9 10 I I 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29
DISTANCE IN NAUTICAL MILES »-
5 10 15 20 25 30 35 40 45 50 55
DISTANCE IN KILOMETERS
Fig. 12. Distribution of suspended sediment (mg/£) on 27 August 1971.
12
-------
Turkey Point
-CHESAPEAKE 8 DELAWARE CANAL-
oid Town PI cap i caog cap3 cap4, caD5 cape cap? capsDEiRz
Bottom Relotive to High Water Surface
I |l I I II
9 10 II 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29
DISTANCE IN NAUTICAL MILES -
20 25 30 35 40 45 50
DISTANCE IN KILOMETERS
55
Fig. 13. Distribution of suspended sediment (mg/8,) on 30 August 1971.
Turkey Point
924 QQ 926 Ul
CHESAPEAKE 8 DELAWARE CANAL-
.2 C6D3 CSM .
I 23456789
10 II 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28
DISTANCE IN NAUTICAL MILES -
20 25 30 35 40 45 50
DISTANCE IN KILOMETERS
29
Fig. 14. Distribution of suspended sediment (mg/£) on 8 September 1971.
CHESAPEAKE 8 DELAWARE CANAL
924 QQ 926 UU
Old Town PI cap I C&D2 C&D3 C&D4 C&D5 C&D6 C&D7 C&D8 DEL R 2
Bottom Relative 10 High Water Surface
234567
I I I I I I I I I
B 9 10 II 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29
DISTANCE IN NAUTICAL MILES
5 20 25 30 35 40 45 50 55
DISTANCE IN KILOMETERS
Fig. 15. Distribution of suspended sediment (mg/S,) on 19 October 1971.
13
-------
Turkey Point
924 QQ 926 UU
CHESAPEAKE 8 DELAWARE CANAL-
cap2 caps cap4 caps cape cap? capsoELRg
Bottom Relative to High Water Surface
I 234567
I |l I I III I |
9 10 II 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29
PISTANCE IN NAUTICAL MILES
10 15 20 25 30 35 40 45 50 55
DISTANCE IN KILOMETERS
Fig. 16. Distribution of suspended sediment (mg/8.) on 16 November 1971.
CHESAPEAKE 8 DELAWARE CANAL-
C8D2 C6D3 CSD4 C8.D5 C8D6 C8D7
|l I I I I
10 II 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29
DISTANCE IN NAUTICAL MILES -
20 25 30 35 40 45 50
DISTANCE IN KILOMETERS
Fig. 17. Distribution of suspended sediment (mg/S.) on 14 December 1971.
Turkey Point
926 UU
-CHESAPEAKE 8 DELAWARE CANAL
C8D2 C8.D3 caM CBD5 C3.D6 C8D7
I I I It
10 II 12 13 14 15 16 17 18 19 20 21 22 23 ?4 25 26 27 28 29
DISTANCE IN NAUTICAL MILES -
20 25 30 35 40 45 50
DISTANCE IN KILOMETERS
Fig. 18. Distribution of suspended sediment (mg/J.) on 27 January 1972.
14
-------
Turkey Point
HESAPEAKE 8 DELAWARE CANAL-
C3D3 C9.D4 CBjDS C8D6 , CS.D7
II I I I I I
I 2 3 4 5 6 7 8 9 10 I I 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29
DISTANCE IN NAUTICAL MILES
0 5 10 15 20 25 30 35 40 45 50 55
DISTANCE IN KILOMETERS
Fig. 19. Distribution of suspended sediment (mg/l) on 28 February 1972.
I I I ll I I I I I I
I 2 3 4 5 6 7 8 9 10 II 12 13 14 15 16 17 18 19 20 31 22 23 24 25 26 27 28 29
DISTANCE IN NAUTICAL MILES -
0 5 10 15 20 25 30 35 40 45 50 55
DISTANCE IN KILOMETERS
Fig. 20. Distribution of suspended sediment (mg/J.) on 14 February 1973.
Turkey Point
CHESAPEAKE 81 DELAWARE CANAL-
cap3 cao4 cara caps
Bottom Relotivc to High Woter Surfoce
I I I |l I I I I I I III
I 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29
DISTANCE IN NAUTICAL MILES
0 5 10 15 20 25 30 35 40 45 50 55
DISTANCE IN KILOMETERS
Fig. 21. Distribution of suspended sediment (mg/l) on 5 October 1976. The bottom
topography indicated in the figure has not been corrected for removal
of the "plug" in the eastern end of the Canal which was completed in
March 1975.
15
-------
The temperature and salinity data, except
for the last two cruises, have been summa-
rized by Pritchard and Gardner (1974). Our
complete set of data--suspended sediment,
temperature, salinity, and weather -are
tabulated in Appendix A.
Throughout most of the year, concen-
trations of suspended sediment are greater
within the Canal than in either the
adjacent Chesapeake Bay or in the Delaware
Bay. This distribution pattern is deter-
mined by the circulation within the Canal
(in preparation). The sediment suspended
within the Canal is derived primarily from
the contiguous bays, with lesser amounts
from resuspension of bottom sediments in
the Canal. The strengths of the sources
have not been determined. The net trans-
port of suspended sediment through the
Canal can probably not be determined
unequivocally with the present data, but
this is being investigated further (in
preparation).
Observations During Dredging
On 20-21 May 1971 we collected a few
samples of suspended sediment in the
vicinity of an operating dredge. Water
samples were collected from the spillway
(Fig. 22), in the discharge plume and in
nearby areas of the Canal. Spillway
samples were collected from the top and
bottom of the spillway. All water samples
collected from the plume were near-surface
(0.5 m) samples. On 20-21 May 1971 the
dredge was located near Chesapeake City,
and the spillway discharge entered the
north side of the Canal. The data are
summarized in Table 2.
SOME COMMENTS ON FISH EGGS AND LARVAE
IN THE CANAL AND THE EFFECTS
OF SUSPENDED SEDIMENT ON
THEIR SURVIVAL AND DEVELOPMENT
Fish Eggs and Larvae
The Chesapeake and Delaware Canal
long has been recognized as an important
spawning and nursery ground for striped
bass in the Chesapeake Bay region. Eggs
and/or larvae of at least twenty other
species have also been identified in
ichthyoplankton samples from the Canal,
and are found in the waterway in all
months of the year (Johnson and Koo,
1973). Peak concentrations of eggs and
larvae are found in spring and summer.
The most important component of this popu-
lation, numerically and economically, is
striped bass (Johnson, 1973). The Canal
Fig. 22. Spillway, showing discharge entering north side of the Canal.
16
-------
TABLE 2
Summary of Suspended Sediment Observations
During Dredging on 20-21 May 1971
Station
Date
Bethel
Road End
20 May 1971
20 May 1971
Chesapeake City
20 May 1971
Discharge Plume
Spillway, Top
20 May 1971
21 May 1971
Spillway, Bottom
Discharge Plume
21 May 1971
21 May 1971
Depth
Time
0900
0940
1020
1100
1110
1200
1230
1300
1330
1400
1200
1330
1400
1430
1440
(m)
0
5
11
0
3
6
9
12
0
3
6
9
12
0
0
0
0
0
0
0
0
0
0
0
0
.5
.5
.5
.1
.1
.1
.1
.1
-.1
.1
.1
.5
.5
Suspended
Sediment
(mg/H)
39
64
181
83
82
87
107
120
67
81
90
84
88
61
53
69
70
68
65
61
99
70
59
63
132
.1
.2
.7
.7
.8
.8
.4
.8
.5
.4
.0
.2
.9
.5
.2
.9
.2
.0
.0
.1
.0
.8
.4
.3
.7
17
-------
is important as a source of striped bass
for the entire Atlantic coast fishery, and
as a migratory shortcut between Chesapeake
Bay and northeastern Atlantic waters.
The C & D Canal is a turbulent and
turbid environment. Maximum tidal cur-
rents average more than 100 cm/sec (2
knots) and the mean current velocity is
about 70 cm/sec. Concentrations of
suspended sediment frequently exceed
background levels in the adjacent upper
Chesapeake Bay (Schubel, 1968; 1969;
Schubel et al., 1968; Schubel and Biggs,
1969), but fall within the range of
concentrations typical of other estuaries
(Schubel, 1975). Concentrations of total
suspended sediment within the Canal,
particularly near the bottom, however,
frequently exceed levels reported to have
significant effects on various life stages
of finfish and invertebrates.
Less is known about the effects of
suspended sediment on fish eggs and larvae
than on adult forms, and even the results
for adults are frequently equivocal. The
variety of laboratory techniques used to
keep sediments in suspension, the differ-
ent kinds of suspended solids used, and
the range of organisms and life stages
tested often make comparisons of results
awkward, and conclusions tenuous.
It is generally recognized that
effects of suspended sediments on organ-
isms depend greatly on the character of
the sediments, the nature and level of
associated contaminants, organism life-
stage, and the intensities of other
stresses, such as temperature, salinity,
and starvation, to which the organisms are
concurrently subjected (Sherk, 1972;
Cairns, 1968; Morgan, Rasin and Noe,
1975). Lack of research on effects of
suspended sediments on organisms which has
incorporated more than a few of these
factors makes it difficult to predict ~u< :
effects in natural environments.
Striped Bass Spawning, Eggs, and Larvae
In the C &^ D_ Canal
Striped bass (Morone saxatilis) is
anadromous, spawning in fresh or brackish
water (Bigelow and Schroeder, 1953).
Spawning in Chesapeake Bay occurs mainly
in April and May (Hildebrand and
Schroeder, 1928; Raney et al., 1952).
Water temperature is the principal factor
controlling time! of spawning, with minimum
temperature approximately 14.4C and opti-
mum temperature about 18.3C (Raney et al.,
1952; Albrecht, 1964). The highest
concentrations of striped bass eggs, up to
36/m3 (Johnson and Koo, 1973), in the
Chesapeake Bay region have been observed
in the western half of the C & D Canal,
near Chesapeake City. Johnson (1973)
collected over 60,000 striped bass eggs
from 15 April to 13 June, 1971, in this
area, with about 77% of the total catch
collected in the last week of April and
the first week of May.
Eggs are cast at the water surface
and are semibuoyant (Johnson and Koo,
1973; Schubel et al., 1974a, b). Position
of eggs in the water column depends on
their effective settling velocities. In
still water striped bass eggs sink rapidly
to the bottom where hatching success
ranges from near zero on mud to less than
60% on gravel (Eiayliss, 1968) . According
to Albrecht (1964), currents of at least
30 cm/sec are required to keep eggs
afloat, with faster currents reportedly
maintaining at least a fraction of the
eggs at or near the surface. Average cur-
rent speed in the Canal is about 70 cm/sec
and Johnson (1973) collected about 39% of
his total catch of striped bass eggs in
near-surface net hauls.
Hatching time is temperature depen-
dent, and varies from 30 hours at 22C to
48 hours at 18C to about 72 hours at 14-
16C (Raney et al., 1952; Bigelow and
18
-------
Schroeder, 1953; Johnson and Koo, 1973) .
Morgan and Rasin (1973) found peak
hatching (% per day) to occur at 19 - 22C,
and temperatures between 16 and 23C to be
optimal for larval survival.
Low salinities are required for
hatching success and larval survival.
Albrecht (1964) found chlorinities between
0.948 and 4.740^0o to be optimal. Our
observations contained elsewhere in this
report and those of others (Pritchard and
Gardner, 1974; Johnson and Koo, 1973; and
Morgan and Rasin, 1973) clearly show that
salinity conditions over the entire
length of the Canal are favorable for
spawning and hatching success, and larval
survival suggested by Albrecht (1964).
Striped bass larvae are approximately
2.5 mm long at hatching, and 3.2 mm at 60
hours (Raney et al., 1952). At this stage
larvae sink to the bottom in quiet water,
even though they possess some swimming
ability. At 84 hours they are 4.4 mm in
length, at 120 hours 5.2 mm, at 144 hours
5.8 mm, and are 6 mm long at 192 hours
(Pearson, 1938, as cited by Raney et al.,
1952). Mansuetti (1958) stated that the
primary cause of larval mortality was
starvation, and Raney et al. (1952) set the
onset of larval vulnerability to this
stress at about 6 mm. The post larval
stage is attained at about 10 days after
fertilization when larvae reach a length
of about 9 mm.
The time required for water to move
from Chesapeake City during 22 - 25 April,
1971, to Delaware Bay ranged from 163
hours to 229 hours (6.8 - 9.5 days)
(Chesapeake Biological Laboratory et al.,
1973). Assuming a hatching time of three
days, striped bass eggs spawned near
Chesapeake City would probably still be in
the western half of the Canal at hatching,
and before being swept out of the Canal
the larvae would be strong enough swimmers
to maintain their positions. The largest
concentrations of striped bass larvae in
the Canal are found in the western half
(Johnson and Koo, 1973).
White Perch Spawning, Eggs, and Larvae
iH the C &_ D Canal
White perch (Morone americana) eggs
accounted for about 11% of the total fish
eggs collected by Johnson (1973) in 1971
and, together with striped bass eggs,
accounted for over 90% of the total eggs
collected in that survey in the Canal
area. White perch is semi-anadromous, and
the spawning season is approximately the
same as that for striped bass. Johnson
(1973) collected about half the total
white perch eggs in the last week of April
and the first week of May, 1971.
White perch eggs are laid in masses,
are adhesive and demersal (Bigelow and
Schroeder, 1953) . Hatching time is 44 -
50 hours at about 18C (Morgan, Rasin and
Noe, 1973) and 144 hours (6 days) at 11C
(Bigelow and Schroeder, 1953). Morgan and
Rasin (1973) found that a salinity range
of 0 - lO^oo had no effect on the hatching
success or development rate of white perch
eggs. Optimum egg development occurs
between 11 and 16C (Morgan and Rasin,
1973).
Johnson (1973) took most white perch
eggs and larvae in the Canal and Elk
River, and about 88% of the total catch in
each was taken by bottom net hauls.
Approximately half of the total white
perch larvae catch was obtained in the
last week of May and the first week of
June, 1971. Length after hatching is 2.3
mm (Bigelow and Schroeder, 1953).
Effects of Suspended Sediment
Concentrations Characteristic
of the Canal on Fish Eggs and Larvae
The spatial and temporal distribu-
tions of suspended sediment in the Canal
are described in detail elsewhere in this
report. Unfortunately, only a very few
observations were made in the months of
April, May, June, and July which include
the period of spawning and larval
19
-------
development for striped bass and white
perch. Maximum concentrations are
expected during the period of peak
discharge of the Susquehanna which occurs
most frequently in March. Our data for
March consequently provide a good estimate
of the maximum concentrations to which
eggs and larvae of striped bass and white
perch would be subjected in a normal year.
Our 1971 data for the section of the
Canal from the Old Town Point Station
through Station C & D 4, which includes the
area of maximum concentrations of fish eggs
and larvae, show that suspended sediment
levels from surface to bottom were almost
always greater in March than during any
other month. In the seven other months in
which sampling occurred, which did not
include April or May, secondary peaks
usually occurred in February. The averaged
data from four sampling cruises in March of
1971 are presented in Table 3. The maximum
and minimum suspended sediment concentra-
tions observed for these five stations are
given in Table 4. The maximum and minimum
levels were observed most frequently on
two cruises, 23 March and 25 March, 1971,
respectively. Readings were occa-
sionally taken at depths up to 12.0 m at
these stations. The maiximum observed
suspended sediment concentration at any of
these stations was 422.5 mg/H measured at
a depth of 12.0 m at Station C & D 4 on
23 March 1971.
Review of literature on Effects
of Suspended Sediment
on Fish Eggs and Larvae
Although eggs and/or larvae of many
species other than striped bass and white
perch are found in the C & D Canal, these
two species dominate the pre-juvenile
population of the waterway, and are present
in the Canal during that period of the year
when suspended sediment, concentrations
normally are highest. For these reasons,
we have focused our attention on research
TABLE 3
Average Suspended Sediment Concentrations (mg/t)
Observed in March 1971 (data from 4 cruises).
Depth
(m)
0
2
4
6
8
10
12
Old Town
Point
95
91
101
102
113
133
11.
.49
.83
.86
.45
.98
.08
8 m
C &
107
124
134
147
162
173
12.
D 1
.23
.98
.69
.04
.82
.50
0 m
C &
117
100
130
162
149
181
260
12.
D 2
.28
.02
.60
.21
.38
.78
.76
3 m
C &
106
110
118
139
158
129
10.
D 3
.01
.04
.12
.01
.77
.33
7 m
C &
111
125
126
148
148
183
268
12.
D 4
.56
.06
.95
.44
.77
.53
.06
7 m
20
-------
TABLE 4
Minimum and (Maximum) Suspended Sediment
Concentrations (mg/d) Observed in 1971.
Station
Depth
(m)
0
2
4
6
8
10
Old Town
Point
64.94
(127.27)
64.62
(121.40)
63.14
(153.85)
63.99
(160.09)
74.47
(173.38)
77.28
(185.65)
C & D 1
56.58
(168.67)
69,46
(205.11)
72.23
(226.82)
86.07
(238.68)
83.35
(273.70)
90.15
(302.90)
C & D 2
54.83
(219.85)
67.61
(202.40)
61.24
(236.24)
72.95
(279.82)
74.47
(273.51)
84.23
(288.75)
C & D 3
46.20
(1 0.13)
56.62
(213.16)
53.87
(217.29)
60.79
(254.94)
82.96
281.84)
78.53
(211.20)
C & D 4
57.83
(193.90)
67.14
(229.17)
79.63
(225.00)
80.03
(266.69)
87.54
(225.78)
86.96
(305.13)
on these species. The eggs of these
species are also of two different and
important types with respect to potential
effects of sediments. Striped bass eggs,
being semi-buoyant, are found throughout
the water column, but usually are concen-
trated below mid-depth in the Canal, where
suspended sediment concentrations are
usually highest. The demersal eggs of
white perch are subject not only to these
higher levels of seston, but also possibly
to smothering by deposition of sediments.
Effects of suspended sediment on fish
eggs and larvae are classed below in three
categories: effects on rate of egg devel-
opment, hatching success, and larval
survival. No discussion of the mechanisms
that lead to these effects is attempted
here, other than to itemize the most
probable means: mechanical (abrasive)
action, smothering, reduction of light,
sorption properties, or any combination of
these factors, by or of the suspended
sediment. It is also possible that
suspended material may act in other ways,
e.g., by interfering with larval feeding
(Cairns, 1968), and through synergistic
effects of suspended sediments in combina-
tion with other physical, chemical and
biological stresses (Sherk, 1972).
Effects of_ Suspended Sediments on_ Hatching
Success of_ Fish Eggs
Morgan, Rasin and Noe (1973, 1975)
tested the effects of different concentra-
tions of suspended sediment on striped
bass and white perch eggs, using apparatus
designed by Schubel et al. (1972). All
sediments tested came from the western
end of the Canal and were mainly silt
and clay.
Morgan et al. exposed white perch
eggs to suspended sediment levels from
50 - 5,250 mg/n, and striped bass eggs to
levels between 20 and 2,300 mg/d. They
found that hatching success of white perch
eggs was unaffected O"er the range of
21
-------
concentrations tested; hatching success of
striped bass eggs was similarly unaffected
by suspended sediment levels throughout
the range tested. Morgan et al. did not
observe adhesion of sediment to eggs of
either species except at concentrations
above 1,000 mg/SL .
These investigators pointed out,
however, that the effect of sediment depo-
sition on white perch eggs is probably of
greater importance than that of suspended
sediments (Morgan et al., 1975). Covering
of white perch eggs by a sediment layer
greater than 2 mm (or about 1.1 mm above
the top of the egg) resulted in total
mortality. Thicknesses from 0.5-1.0 mm
(about half to all of the egg buried)
resulted in mortalities greater than 50%.
Morgan et al. concluded that a deposited
sediment layer of less than half (about
0.45 mm) the diameter of the egg did not
significantly affect the hatching success
of white perch eggs.
Auld and Schubel (1974) tested the
effects of continuous exposure to natural
fine-grained suspended sediments on six
anadromous species: striped bass, white
perch, yellow perch (Perca flavesaens),
American shad (Alosa sapidissima),
blueback herring (Alosa aestivalis), and
alewife (Alosa pseudoharengus). The eggs
and/or larvae of all these species have
been found in the C & D Canal (Johnson,
1973). The apparatus used to maintain
suspensions was that described by Schubel
et al. (1972). Concentrations of suspended
sediment tested were 25, 50, 100, 500 and
1,000 mg/a (in excess of control concen-
tration which were <10 mg/s.) . Sediments
were collected from the main body of the
Chesapeake Bay and fractionated by settling
to remove particles with settling veloci-
ties greater than about 5 x 10 3 cm/sec;
only the finer fractions were used in
their experiments.
None of these concentrations signifi-
cantly (p < 0.05) affected hatching
success of yellow perch, blueback herring
or shad eggs, but a suspended sediment
concentration of 1,000 mg/£ did signifi-
cantly reduce the hatching success of
striped bass and white perch eggs. Test
results on alewife eggs were inconclusive
(Auld and Schubel, 1974).
The results of the above experiments
support earlier work by Schubel et al.
(1973), using the same laboratory
apparatus and sediment types, on the
effects of suspensions up to 1,000 mg/fc
on the hatching success of striped bass
and yellow perch eggs. These experiments
showed that only concentrations of 1,000
rng/H had a significant effect on the hatch
of yellow perch and striped bass eggs (at
the 90% and 99.9% confidence levels,
respectively).
These results are also consistent
with those reported by Schubel and Wang
(1973) working with natural fine-grained
sediments in excess concentrations of 25,
50, 100, and 500 mg/l. Schubel and Wang
reported no significant (95% confidence
level) effect on hatching success of white
perch, striped bass, or yellow perch eggs
from suspended sediment levels in the
tested range.
A conservative estimate of a maximum
limit to which striped bass and white
perch eggs might safely be subjected over
the entire incubation period, based on the
above findings, would seem to be about 500
mg/l, regardless of any delays in hatching
caused by low temperatures or high levels
of suspended material. Based on our
sampling in the C & D Canal, as previously
summarized, prolonged 6'xposures to seston
levels in excess of 300 mg/z, in the west-
ern half of the Canal rarely occurs, even
in the discharge1 of an active dredge. All
available evidence indicates that these
eggs can tolerate extremely high (perhaps
>1,000 mg/£) seston levels for periods of
many hours. It is unlikely that, even
close to an operating dredge, suspended
sediment concentrations would be main-
tained at that level for a significant
length of time.
22
-------
Effects of Suspended Sediments on Rates of
Fish Egg Development
Morgan et al. (1973; 1975) found that
while suspended sediment concentrations
from 50-5,250 mg/n and from 20-2,300 mg/8.
did not significantly affect the hatching
success of white perch and striped bass
eggs, respectively, concentrations in
excess of 1500 mg/£ significantly
(p = 0.05) slowed the rate of egg develop-
ment for both species.
Morgan et al. found that the develop-
ment rate of white perch eggs exposed to
5,250 mg/£ suspended solids was about 65%
of control eggs; lesser concentrations had
a smaller influence, with suspensions of
2,000-3,250 mg/£ reducing egg development
rate to 80-85% of controls. The maximum
delay in hatching of white perch eggs
caused by the upper seston levels was one
day. Striped bass eggs appear more
vulnerable to this particular effect, and
Morgan et al. reported that suspended
sediment levels from 1,500 - 2,300 mg/H
reduced the development rate of eggs to
about 80% of that of the controls. If the
normal hatching period for striped bass
eggs is three days, this reduction would
represent an extension of incubation
by about 18 hours.
Schubel and Wang (1973) also
reported that concentrations of suspended
sediment which did not significantly
affect hatching success for several
species of eggs did retard hatching by up
to half a day. These results are summar-
ized in Table 5. The concentrations of
suspended sediments used by Schubel and
Wang were 25, 50, 100 and 500 mg/£.
Neither Schubel and Wang (1973) nor Morgan
et al. (1973; 1975) observed any abnormal
development of experimental eggs.
There is no evidence to indicate that
a short delay in hatching of fish eggs is,
by itself, an undesirable effect of
suspended sediments. A delay in hatch of
striped bass eggs of one day is well
within observed variation in incubation
period observed in the field (Raney et
al. , 1952) . Nor does it appear
that, in the C & D Canal, a delay in
hatching of one day would significantly
increase the probability that striped bass
eggs would be transported into the
eastern end of the Canal or into Delaware
Bay, where environmental conditions are
not as favorable for larval survival.
TABLE 5
Delay in Hatching of Eggs Incubated in Suspensions
of Natural Fine-Grained Sediments (after Schubel and Wang, 1973)
Yellow perch
Yellow perch
Concentration of
Suspended Sediment
100 mg/i
500 mgA
Delay in Hatching
Relative to Controls
6-12 hr
6-12 hr
White perch
White perch
100 mg/r
500 mg/J
4-6 hr
4-6 hr
Striped bass
Striped bass
100 mg/1
500 mg/Z
4-6 hr
4-6 hr
23
-------
Effects of Suspended Sediments on Fish
Larvae
Morgan et al. (1973; 1975)
conducted a series of experiments, using
an apparatus designed by Schubel et al.
(1972), to test the effects of different
levels of suspended sediment on wh'ite
perch and striped bass larvae. Greatest
length of exposure was two days. The
results of these experiments are summar-
ized in Table 6.
Morgan et al. (1973; 1975) also ran
some experiments using a six hour exposure
period. Neither white perch nor striped
bass larvae sujected to suspended sediment
concentrations up to 5200 mg/z for six
hours suffered significant mortalities.
Morgan et al. pointed out that longer
exposures to lower concentrations might be
lethal. No examination for sublethal
effects was conducted. Allowing for this
lack of information, Morgan et al. con-
cluded that there was no indication that
suspended material concentrations in the
C & D Canal, including those resulting
from dredging, posed a threat to the
survival of larvae of these species.
Auld and Schubel (1974) using the
laboratory apparatus described by Schubel
et al. (1972) assessed the effects of
continuous exposure to excess concentra-
tions of suspended sediment of 50, 100,
500 and 1,000 mg/? on mortality of larvae
of American shad, striped bass and yellow
perch, using fine-grained Chesapeake Bay
bottom sediments. The results of this
work are summarized in Table 7. Auld and
Schubel (1974) concluded that suspensions
of fine-grained material at or above a
concentration of 500 mg/j, had a signifi-
cant effect on the survival of striped
bass larvae exposed for two days or more,
and on American shad and yellow perch
larvae exposed for four days. American
shad larvae appear to be less tolerant to
suspended sediment and suffered signifi-
cantly higher mortalities than control
larvae when subjected continuously to
TABLE 6
Effects of Suspended Sediment on Mortality
of Fish Larvae (after Morgan et al., 1973, 1975)
White Perch Larvae
Suspended Sedi-
ment Range (mg/£)
1626-5380
1626-5380
Mortality
(percent)
14.6-19.3
23.3-49.3
Exposure
(days)
1
2
LD
50
Concentration (mg/£)
66,989 (1 day)
6,903 (2 days)
Striped Bass Larvae
Suspended Sedi-
ment Range (mg/i)
1557-5210
1557-5210
Mortality
(percent)
19.9-31.3
24.7-56.7
Exposure
(days)
1
2
LD50
Concentration (mg/E)
20,417 (1 day)
6,292 (2 days)
24
-------
TABLE 7
Effects of Suspended Sediments on Mortality
of Fish Larvae (after Auld and Schubel, 1974)
American shad
Age at Start
of Experiment
4 - 12 hr
Exposure
(days)
Suspended Sediment Levels
having Significant*
Effect on Larval Survival
100f, 500, 1,000 rng/8.
Striped bass
Yellow perch
4 - 8 hr
24 hr
2, 3
500, 1,000 mg/d
500, 1,000 mg/H
*
1
p 1 0.005
p < 0.025
concentrations as low as 100 ing/8, for four
days. Based on these results of the
species tested, only American shad larvae
would appear likely to be affected by
dredging or disposal operations, if within
about one hundred meters of the activity.
Shad eggs and larvae, however, are insig-
nificant components of the pre-juvenile
population in the Chesapeake and Delaware
Canal (Johnson and Koo, 1973).
Wakeman et al. (1975) studied the
effects of high suspended sediment levels,
generated by open water hopper dredge
disposal, on eighteen species of finfish
and invertebrates. Of the finfish tested,
juvenile striped bass and shiner perch
(Cymatogaster aggregata) were considered
the most sensitive to high seston levels.
Wakeman et al. subjected these juveniles
to suspensions of fine-grained bentonite,
ranging from 600 to 6,000 mg/£ , for ten
days. Their results are summarized in
Table 8. Wakeman et al. (1975) concluded
that . . . "the survival of both striped
bass and shiner perch showed a strong
direct correlation with dissolved oxygen.
slight direct correlation with temperature
and a very strong inverse correlation with
suspended solids concentration."
Wakeman et al. (1975) recorded the
suspended solids levels at different
heights above the bottom, after hopper
disposal of dredged spoils. They noted
that even at 0.5 m above the disposal area
bottom, suspended sediment concentrations
of greater than approximately 2,000 mg/S,
persisted no longer than about 25 minutes
after dumping. Wakeman et al. concluded
that such dumping and the resultant
turbidity, even near the bottom, normally
does not adversely affect even relatively
sensitive finfish, but that significant
mortalities might result from these activ-
ities if: (1) a persistent turbidity
current was created at the bottom, and
(2) the dumped material contained a large
fraction of organic material, thus
reducing oxygen content of bottom waters,
especially in summer months.
Griffin's (1938) tests of the effects
of high levels of suspended natural
material on ^uvenile trout and salmon
25
-------
TABLE 8
Effects of Suspended Sediment on Mortality of
FLsh Larvae (after Wakeman et al., 1975)
(gm/1) (for 10 days)
Species
Striped
bass
Shiner
perch
Temp . C
18
18
18
18
Dissolved
°2 (ml/1)
5
2
5
2
LC50 LC20
>2 >2
4.6 2.0
>2 1.8
0.9 <0.6
LC10
>2
1.2
0.5
<0.6
provide qualitative support for the
conclusions reached above that pre-adult
fishes are generally tolerant to high
levels of suspended sediment. Griffin
exposed fingerling trout for three weeks
to suspended sediment levels that fluctu-
ated daily from 3,500 to 360 mg/,, but
which usually averaged 500 rag/-1 for 18
continuous hours each day. Fifty-six
percent of the trout survived the entire
test period, a much larger fraction
than of those held in control tanks, due
to unforeseen adverse conditions in the
latter. No apparent differences were
observed between surviving control and
experimental fish. A similar experiment
ran for four weeks with juvenile Chinook
salmon; suspended solids levels fluctuated
daily, from 6,500 to 300 mg/?, averaging
about 700 mg/s for 18 continuous hours
each day. At the end of the four week
period, 88% of the experimental fish and
36% of the controls survived. Griffin
(1938) could not find a significant
difference in mortality between the
control and experimental fish after the
first three days of the experiment.
Other indirect evidence supporting a
conclusion of high tolerance of fish
larvae and juveniles to relatively high
and fluctuating concentrations of
suspended sediment comes from the work of
Davis (1960) and Davis and Hidu (1969) who
worked with the larvae of three species
of bivalve molluskshard clam (Hercenaria
r-icTcenaria] , American oyster (Crassoatrea
vipainica), and European oyster (Ostrea
ed-ul's). Davis (1960) tested the effects
of varying concentrations of kaolin,
Fuller's earth, chalk, and silt upon hard
clams exposed for 2 anc 12 days. Davis
found a concentration of 4,000 mg/H of
silt resulted ir total mortality of clam
larvae if continuously exposed for two
days. Although significant mortalities
also occurred in silt suspensions of 2,000
mg/8, , surviving larvae developed normally
if returned to control sea water. Davis
concluded that the maximum upper limit
for hard clam larval survival in silt
suspensions, for which no significant
mortalities would occur (for at least 12
days) was 750 mg/i> . Davis and Hidu (1969)
found no significant mortalities of
European oyster larvae exposed to silt
suspensions of 4,000 mg/S. for seven days.
American oyster larvae were found to be
more sensitive, suffering significant
mortalities in concentrations of 750 mg/l
after 12 days exposure. In both
26
-------
experiments (Davis, 1960; Davis and Hidu,
1969) it was noted that larval tolerance
to suspended material varied greatly
depending on which of the above solids was
tested, and that the ranked toxicity of
these solids was different for each
species.
Considering the lack of precise data
on the effects of suspended sediments on
fish larvae, it is impossible to set
a "safe" upper limit for concentrations of
suspended sediment for striped bass or
other larvae in the C & D Canal. Based on
the data presented above, and on the con-
clusions of those authors, it appears that
the normal range of background levels of
suspended sediment in the Canal, and per-
turbations caused by dredging and disposal
are probably not harmful to these larvae.
Striped bass larvae and juveniles remain
in the Canal for a variable and undeter-
mined amount of time and are able to avoid
disturbed areas such as those being
dredged. As larvae grow older and more
tolerant of suspended material during late
spring and early summer, suspended
sediment concentrations in the Canal are
usually decreasing.
Summary
The Chesapeake and Delaware Canal is
one of the most important spawning and
nursery areas for striped bass on the
Atlantic coast. The Canal fits well the
general outline of a low salinity nursery
for many species as an environment in
which there are warmer water temperatures
than in the bays or coastal areas, an
abundance of food, fewer predators, and
a reduction in competition because of the
low-diversity community (Chesapeake
Biological Laboratory et al., 1973).
The normal salinity, water velocity
and suspended sediment conditions of the
Canal region appear to be ideal for the
eggs and larvae of striped bass and
perhaps other estuarine species. Many
investigators (e.g., Mansueti, 1961;
Talbot, 1966) have pointed out that
striped bass is especially well adapted to
turbulent and turbid environments.
The normal range of concentration of
suspended sediments in the Canal does not
appear to have a significant effect upon
hatching success or larval survival of the
species discussed above; nor has it been
demonstrated that local, short-term
increases in suspended sediment that might
result from dredging have such effect
(Morgan et al., 1973; Auld and Schubel,
1974; Schubel et al., 1973).
Material dredged from within the
Canal is disposed of by pumping the
material onto fastlands bordering tne
Canal. We observed in 1970-1971 that the
concentrations of suspended sediment in
the spillway effluent were not signifi-
cantly higher, and were sometimes lower,
than ambient concentrations outside of the
dredging area. Open water disposal occurs
only outside of the Canal proper.
Chlorinity can be converted to salinity
by the following relationship,
S = 1.8065 Cl.
27
-------
LITERATURE CITED
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of striped bass eggs and larvae.
Calif. Fish and Game 50 (2): 100-113.
Auld, A. H. and J. R. Schubel. 1974.
Effects of suspended sediment on fish
eggs and larvae. Chesapeake Bay
Institute Special Report 40, Ref.
74-12. 61 pp.
Bayliss, J. D. 1968. Striped bass hatch-
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Ann. Conf., S. E. Game and Fish
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Bigelow, H. B. and W. C. Schroeder. 1953.
Fishes of the Gulf of Maine. U. S.
Fish and Wildl. Svc. Fish. Bull.,
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Cairns, J. 1968. Suspended solids stan-
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Chesapeake Biological Laboratory (Univ.
Md.), Chesapeake Bay Institute (The
Johns Hopkins Univ.), and College of
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Hydrographic and ecological effects
of enlargement of the Chesapeake and
Delaware Canal. Summary of interim
findings. Report to the Phila.
Dist., U. S. Army Corps of Engineers.
36 pp.
Chesapeake Biological Laboratory (Univ.
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Johns Hopkins Univ.), and College of
Marine Studies (Univ. Del.). 1973.
Hydrographic and ecological effects
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Delaware Canal., Final Report. Sum-
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the Phila. Dist., U. S. Army Corps of
Engineers. 137 p. plus 15
Appendices.
Cronin, L. E., D. W. Pritchard, T. S. Y.
Koo and V. Lotrich. 1977. Effects
of enlargement of the Chesapeake and
Delaware Canal, pp. 18-32 -in
Estuarine Processes, Vol. 2, Circula-
tion, Sediments and Transfer of
Material in the Estuary, Wiley, M.
(ed.), Academic Press, N. Y.
Davis, H. C. 1960. Effects of turbidity-
producing materials in sea water on
eggs and larvae of the clam (Venus
(Mere en aria] me rcenari a) . Biol.
Bull. 18:48-54.
, and H. Hidu. 1969. Effects of
turbidity-producing substances in sea
water on eggs and larvae of three
genera of bivalve mollusks. The
Veliger 11:316-323.
Gray, R. D. 1967. The National Waterway.
A History of the Chesapeake and
Delaware Canal, 1769-1965. Univ. of
Illinois Press, Urbana. 279 pp.
Griffin, L. E. 1938. Experiments on
tolerance of young trout and salmon
for suspended sediment in water.
Oregon State Dept. of Geology and
Mineral Industries, Bull. 10
(Appendix B):28-31.
Hildebrand, S. F. and W. C. Schroeder.
1928. Fishes of Chesapeake Bay.
Bull. U. S. Bureau Fish., XLIII, Pt.
1, 366 pp.
Johnson, R. K. 1973. Production and
distribution of fish eggs and larvae
in the Chesapeake and Delaware Canal.
Appendix 1 to Ches. Biol. Lab. (Univ.
of Md.), Chesapeake Bay Institute
(The Johns Hopkins Univ.), and
College of Marine Studies (Univ.
Del.). 1972. Hydrographic and
ecological effects of enlargement of
the Chesapeake and Delaware Canal.
Final Report. Summary of research
findings. Report to the Phila.
Dist., U. S. Army Corps of Engineers.
137 pp. plus 15 Appendices.
, and T. S. Y. Koo. 1973.
Production and distribution of
striped bass (Morone saxatilis) eggs
in the Chesapeake and Delaware Canal.
Ches. Sci. 16 (1) :39-55.
Mansueti, R. J. 1958. Eggs, larvae and
young of the striped bass, Rocaus
saxatilis. Chesapeake Biol. Lab.
Contr. 112:35 pp.
. 1961. Effects of civilization
on striped bass and other estuarine
biota in Chesapeake Bay and tributar-
ies. Proc. Gulf and Carib. Fish.
Inst., 4th Ann. Sess. pp. 110-136.
Morgan, R. P. and V. J. Rasin, Jr. 1973.
Effects of salinity and temperature
on the development of eggs and larvae
os striped bass add white perch.
Appendix X to Ches. Biol. Lab.
(Univ. Md.), Chesapeake Bay Insti-
tute (The Johns Hopkins Iniv.), and
College of Marine Studies (Univ.
Del.). 1973. NRI Ref. 73-109.
Morgan, R. P., V. J. Rasin and L. A. Noe.
1973. Effects of suspended sediments
on the development of eggs and larvae
of striped bass and white perch.
Appendix XI to Ches. Biol. Lab.
(Univ. Md.), Chesapeake Bay Institute
(The Johns Hopkins Univ.), and
College of Marine Studies (Univ.
Del.) . 1972. Hydrographic and eco-
logical effects of enlargement of the
Chesapeake and Delaware Canal. Final
Report. Summary of research fin
ings. Repo'rt to the Phila. Dist.,
U. S. Army Corps of Engineers. 137
pp. plus 15 Appendices.
, , and . 1975.
Effects of sediments on larvae devel-
opment of striped bass, Morcne
saxatilis, and white perch, Morone
americanus . Unpubl. Manuscript,
Center of Environmental and Estuarine
Studies, Univ. of Md.
Pritchard, D. W. and G. B. Gardner. 1974.
Hydrography of the Chesapeake and
Delaware Canal. Chesapeake Bay
Institute Tech. Report 85, Ref. 74-1,
the Johns Hopkins University, 77 pp.
plus appendices.
28
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Raney, E. C. 1952. The life history of
the striped bass, Flo as us saxatilis
(Walbaum). Bull. Bingh. Oceanogr.
Coll. 14 (1) :5-97.
Raney, E. C., E. F. Tresselt, E. H.
Hollis, V. D. Vladyaov and D. H.
Wallace. 1952. The striped bass,
Rocaus saxatilis. Bull. Bingh.
Oceanogr. Coll. 14(1):177 pp.
Rives, S. R. 1977. Adaptation of J. R.
Hunter's one-dimensional model to the
Chesapeake and Delaware Canal system.
Chesapeake Bay Institute, Special
Report 60, Ref. 77-2. (in press)
Schiemer, E. W. and D. W. Pritchard.
1961. An induction conductivity
temperature indicator. Chesapeake
Bay Institute Tech. Report. 25, Ref.
61-4, 75 pp.
Schubel, J. R. 1968. Suspended sediment
of the northern Chesapeake Bay.
Chesapeake Bay Institute Technical
Report 35, Ref. 68-2, 264 pp.
1969. Distribution and trans-
portation of suspended sediment in
upper Chesapeake Bay. Chesapeake Bay
Institute Technical Report 60, Ref.
69-13, 29 pp.
1975. Fine particles and water
quality in the coastal marine envir-
onment. Paper 34-2 in International
Conference on Environmental Sensing
and Assessment, Vol. 2, Inst. of
Electrical and Electronics
Engineering, Inc., New York.
, C. H. Morrow and W. B. Cronin.
1968. Suspended sediment data
summary, March 1966-May 1967. Upper
Chesapeake Bay (Tolchester to Havre
de Grace). Chesapeake Bay Institute
Special Report 14, Ref. 68-11. 60 pp
and R. B. Biggs. 1969. Distri-
bution of seston in upper Chesapeake
Bay. Ches. Sci. 10(l):18-23.
, E. W. Schiemer and G. M. Schmidt.
A laboratory apparatus for
, A. H. Auld and G. M. Schmidt.
1973. Effects of suspended sediment
on the development and hatching
success of yellow perch and striped
bass eggs. Ann. Conf. S. E. Game and
Fish Comm., Proc. 27-7. pp. 689-694.
, , and G. M. Schmidt.
1974. Effects of suspended sediment
on the development and hatching
success of yellow perch and striped
bass. Chesapeake Bay Institute.
Special Report 35, Ref. 74-2.
and J. C. S. Wang. 1973. The
effects of suspended sediment on the
hatching success of Perca flaveseens
(yellow perch), Movone americana
(white perch), Morone saxatilis
(striped bass), and Alosa
pseudoharengus (alewife) eggs.
Chesapeake Bay Institute Special
Report 30, Ref. 73-3. 77 pp.
, W. B. Cronin and A. H. Auld.
1974a. Preliminary observations of
the sizes and settling velocities of
the eggs of some Chesapeake Bay
fishes. Chesapeake Bay Institute
Special Report 36, Ref. 74-4. 7 pp.
, . and G. M. Schmidt.
1972.
maintaining uniform suspensions of
fine grain sediment. Ches. Sci.
13(2) :154-156.
1974b. Some observations of the
sizes and settling velocities of fish
eggs. Chesapeake Bay Institute
Special Report 37, Ref. 74-5. 27 pp.
Sherk, J. A., Jr. 1972. Current status
of the knowledge of the biological
effects of suspended and redeposited
sediments in Chesapeake Bay. Ches.
Sci. 13 (suppl.): sl37-s!44.
Talbot, G. B. 1966. Estuarine environ-
mental requirements and limiting
factors for striped bass. Amer.
Fish. Soc. Spec. Publ. 3:37-49.
Wakeman, T., R. Peddicord and J, Sustar.
1975. Effects of suspended solids
associated with dredging operations
on estuarine organisms. in E. Herz,
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Conf. Marine Technology Society.
pp. 431-436.
29
-------
APPENDIX A
SUMMARY OF OBSERVATIONS
30
-------
STATION 924 QQ WEATHER 02
DEPTH 11.6 m WIND DIR 290°
DATE 11 March '71 WIND SPEED 16 k
TIME 1155 SECCHI DISK
DEPTH
( m )
0.0
2. 0
4.0
6.0
8.0
10. 0
11.0
TEMP
(C )
3.51
3.19
3.15
3.11
3.11
3.12
3-19
SAL
(%)
0.09
0.10
0.11
0.11
0.11
0.11
0.11
SUSP
SED
(mg/l)
13.03
13.63
16.81
21.83
29.76
62.73
COMB
ORG
(%)
STATION 926 UU WEATHER 02
DEPTH 11.0m WIND DIR 290°
DATE 11 March '71WIND SPEED 22 k
TIME 1225 SECCHI DISK
DEPTH
( m)
0 .0
2.0
1.0
6.0
8.0
10.0
TEMP
(C )
3.45
3.15
3-35
3.33
3-32
3.38
SAL
(%o)
0.10
0.10
0.11
0.10
0.10
0 .10
SUSP
SED
(mg/l)
32.72
32.63
41. 31
45.80
50.13
63-39
COMB
ORG
( %)
STATION 0 T Ft WEATHER 02
DEPTH H.6 m WIND DIR 290°
DATE 11 March '71 WIND SPEED 16 k
TIME 1310 SECCHI DISK
DEPTH
( m )
0 .0
2.0
1.0
6.0
8.0
10.0
TEMP
( C )
3.15
3.13
3.36
3.33
3.33
3-33
SAL
(%o)
0.10
0.10
0.11
0.11
0.11
0.11
SUSP
SED
(mg/l)
127.27
121.10
153.85
160.09
173.38
185.65
COMB
ORG
(%)
STATION C & D 1 WEATHER 02
DEPTH 12.2 m WIND DIR 290°
DATE 11 March '71WIND SPEED 16 k
TIME 1335 SECCHI DISK
DEPTH
(m )
0.0
2.0
4.0
6.0
8.0
10.0
12.0
TEMP
(C)
3.81
3-75
3.64
3-65
3.66
3.69
3.73
SAL
(%o)
0.21
0.21
0.20
0.23
0.24
0.25
0.25
SUSP
SED
( mg/ 1 )
137.64
119.86
164 .12
168.28
193.37
190.23
250.70
COMB
ORG
(%)
STATION C & D 2 WEATHER 02
DEPTH 12.2 m WIND DIR 315°
DATE 11 March '71 WIND SPEED 21 k
TIME 1405 SECCHI DISK
DEPTH
(m)
0 .0
2.0
1.0
6.0
8.0
10.0
12.0
TEMP
(C )
1.32
1. 30
4.31
4.25
1.21
1.25
1.28
SAL
(%> )
0.79
0.79
0.82
0.81
0.81
0.83
0.82
SUSP
SED
(mg/l)
117.63
121.71
127.79
203.93
273.51
248.69
269.32
COMB
ORG
(%)
STATION C & D 3 WEATHER 02
DEPTH 11.0 m WIND DIR 315°
DATE 11 March '71WIND SPEED 16 k
TIME 1410 SECCH 1 DISK
DEPTH
( m)
0.0
2.0
4.0
6.0
8.0
10 .0
TEMP
( C )
4.49
4.47
4. 43
4.11
4.10
4 .43
SAL
(%.)
1.51
1 .53
1.63
1.68
1.72
1.71
SUSP
SED
(mg/l)
111.38
99-71
118.56
153-35
178.34
211.20
COMB
ORG
(%)
31
-------
STATION C & IJ 4 WEATHER 02
DEPTH 12.2 rn WIND DIR
DATE LI March '71 WIND SPEED
TIME 1500 SECCHI DISK
DEPTH
( m )
0.0
2 .0
4.0
6.0
8.0
10.0
12.0
TEMP
(C)
4.50
4.45
4.43
4.42
4.40
4.41
4 .44
SAL
(%o)
1.72
1.71
1.73
1.73
1.73
1.74
1.73
SUSP
SED
(mg/l)
116. 71
119 .21
115.19
142. 10
176.49
225.61
COMB
ORG
(%)
STATION (' & L' 5 WEATHER 02
DEPTH 10.0 m WIND DIR 315°
DATE 11 March '71 WIND SPEED 13 k
TIME 1530 SECCHI DISK
DEPTH
( m)
0.0
2.0
4.0
6.0
8.0
10 .0
TEMP
(C )
4 .61
4.60
4.60
4.57
4.56
4.56
SAL
(%o)
1.76
1.77
1.77
1.79
1.80
1.78
SUSP
SED
(mg/l)
88.82
102.81
137.56
147.42
166 .43
1043.52
COMB
ORG
( % )
STATION C & D 6 WEATHER 02
DEPTH 10.0 m WIND DIR 310°
DATE 11 March '71 WIND SPEED 10 k
TIME 1545 SECCHI DISK
DEPTH
( m )
0.0
2.0
4.0
6.0
8.0
9.0
TEMP
( C )
4.85
4.81
4.84
4.63
4.68
4. 72
SAL
(%o)
1.78
1.75
1.77
1.77
1.74
1.73
SUSP
SED
(mg/ 1)
83.67
84.25
117.12
138.49
194.00
COMB
ORG
(%)
STATION C & D 7 WEATHER 02
DEPTH 8.6 m WIND DIR 320°
DATE 11 March '71 WIND SPEED 09 k
TIME 1600 SECCHI DISK
DEPTH
( m )
0.0
2.0
4.0
6.0
8.0
TEMP
(C)
4.74
4.72
4.62
4.49
4.53
SAL
(%o)
2.15
2.14
2.24
2.33
2.35
SUSP
SED
(mg/l )
67.33
67.08
79.37
80.42
86.89
COMB
ORG
(%)
STATION C & D 8 WEATHER
DEPTH 10.1 m WIND DIR 320°
DATE 11 March '71 WIND SPEED 13 k
TIME 1620 SECCHI DISK
DEPTH
(m)
0 .0
2.0
4.0
6.0
8.0
10 .0
TEMP
(C )
4 .70
4.69
4.63
4.69
4.50
4.60
SAL
(7oo )
2.02
2.03
2.10
2.16
2.25
2.15
SUSP
SED
(mg/l)
86.53
87.17
101.54
65.30
COMB
ORG
(%)
STATION D R 1 WEATHER
DEPTH WIND DIR
DATE WIND SPEED
TIME SECCHI DISK
DEPTH
( m)
TEMP
(C )
SAL
(%o)
SUSP
SED
(mg/l)
COMB
ORG
(%)
32
-------
STATION D B 2 WEATHER 02
DE PTH 12 . 2 p WINDDIR
DATE 11 "'arch '71 WIND SPEED
TIME 1630 SECCHI DISK
DEPTH
( m )
0.0
p . 0
4.0
f, _ o
B.O
10. 0
12.0
TEMP
(C )
".59
4.57
4.53
4 . V
4.52
4.53
4.58
SAL
(%o)
0.55
0.55
0 . 5 9
r< ^ ">
J . t 1
0 . 6 6
".67
0 . o ' }
SUSP
SED
(mg/l)
COMB
ORG
(%)
STATION D P 3 WEATHER 02
DEPTH 13.4 PI WIND DIR
DATE 11 March '71 WIND SPEED
TIME 1645 SECCHI DISK
DEPTH
( m)
0 .0
2 .0
4 .0
6.0
8.0
10.0
12.0
TEMP
(C )
4 .67
14.6?
4.67
4 .67
4.68
4 . 70
4 .70
SAL
(%o)
0.12
0. 12
0.12
0.12
0.12
0.13
0.13
SUSP
SED
(mg/l)
COMB
ORG
( %)
STATION WEATHER
DEPTH WIND DIR
DATE WIND SPEED
TIME SECCH 1 DISK
DEPTH
( m )
TEMP
( C )
SAL
(%o)
SUSP
SED
( mg / 1 )
COMB
ORG
(%)
STATION WEATHER
DE PTH WIND DIR
DATE WIND SPEED
TIME SECCHI DISK
DEPTH
( m }
TEMP
(C)
SAL
(%o)
SUSP
SED
(mg/l )
COMB
ORG
(%)
STATION WEATHER
DEPTH WIND DIR
DATE WIND SPEED
TIME S ECCH 1 DISK
DEPTH
(m)
TEMP
(C )
SAL
(7oo )
SUSP
SED
(mg/l)
COMB
ORG
(%)
STATION WEATHER
DE PTH WINDDIR
DATE WIND SPEED
TIME SECCH 1 DISK
DEPTH
( m )
TEMP
( C )
SAL
(%o)
SUSP
SED
(mg/l)
COMB
ORG
(%)
33
-------
STATION 924 QQ WEATHER 01
DEPTH ll.o m WIND DIR 315°
DATE 23 March '71 WIND SPEED 09 k
TIME 1130 SECCHI DISK
DEPTH
( m)
0 .0
2.0
4.0
6.0
8.0
10.0
TEMP
(C)
5.07
4.95
4.98
5.00
4.95
4.97
SAL
(%o)
0.07
0.09
0.08
0 .07
0.09
0.07
SUSP
SED
(mg/l)
45.28
54.47
53.15
58.95
78.01
108.63
COMB
ORG
(%)
STATION 926 UU WEATHER 00
DEPTH 10.7 m WIND DIR 315°
DATE 23 March '71WIND SPEED 06 k
TIME H05 SECCHI DISK
DEPTH
(m)
0.0
2.0
4.0
6.0
8.0
10.0
TEMP
(C )
6.20
6.15
6.01
6.00
6.00
6.02
SAL
(%o)
0.11
0.11
0.11
0.11
0.11
0.11
SUSP
SED
(mg/l)
43.26
48.11
69.15
81.87
96.74
158.44
COMB
ORG
(%)
STATION 0 T FT WEATHER 01
DEPTH 11.6 m WIND DIR 315°
DATE 23 March '71WIND SPEED 13 k
TIME 1030 SECCHI DISK
DEPTH
( m )
0.0
2.0
4.0
6.0
8.0
10.0
11.0
TEMP
( C )
6.16
6.18
6.18
6.17
6.16
6.17
6.19
SAL
(%o)
0.12
0.11
0.11
0.11
0.11
0 .11
0.12
SUSP
SED
(mg/l)
119.87
108.72
121.98
113.75
118.95
163.45
168.29
COMB
ORG
(%)
STATION C & D 1 WEATHER 01
DEPTH 11.9 m WIND DIR 315°
DATE 23 March '71 WIND SPEED 05 k
TIME 1015 SECCHI DISK
DEPTH
(m )
0.0
2.0
4.0
6.0
8.0
10.0
TEMP
(C)
6.30
6.24
6.22
6.22
6.23
6.23
SAL
(%o)
0.19
0.19
0.19
0.21
0 .19
0.21
SUSP
SED
(mg/ 1 )
168.67
205.11
226.82
238.68
273.70
302.90
COMB
ORG
(%)
STATION C & D 2 WEATHER
DEPTH 12.2 m WIND DIR 330°
DATE 23 March '71WIND SPEED 12 k
TIME 0950 SECCH 1 DISK
DEPTH
(m)
0.0
2.0
4.0
6.0
8.0
10.0
12.0
TEMP
(C )
6.14
6.17
6.18
6.17
6.17
6.17
6.18
SAL
(°/oo )
0.35
0.33
0.32
0.38
0.38
0.37
0.35
SUSP
SED
(mg/l)
219.85
202.40
236.24
279.82
288.75
340.20
COMB
ORG
(%)
STATION C & D 3 WEATHER 01
DEPTH 8.2 m WIND DIR 340°
DATE 23 March '71 WIND SPEED 13 k
TIME 0935 SECCHI DISK
DEPTH
( m)
0.0
2 .0
4.0
6.0
8.0
TEMP
( C )
6.15
6.12
6.14
6.13
6.14
SAL
(%o)
0.48
0.54
0.55
0.57
0.58
SUSP
SED
(mg/l)
190.13
213.16
217.29
254.94
281.84
COMB
ORG
(%)
34
-------
STATION C & D 4 WEATHER 02
DE PTH 13.4m WIND DIR
DATE 23 March '71 WIND SPEED
TIME 0910 SECCHI DISK
DEPTH
( m )
0.0
2.0
4.0
6.0
8.0
10.0
12.0
TEMP
(C)
6.04
6.08
6.10
6.10
6.11
6.11
6.13
SAL
(%o)
o.?6
0.79
0.82
0.86
0.85
0.85
0.75
SUSP
SED
(mg/l)
193-70
229.17
225.00
266.69
225.78
305.13
422.50
COMB
ORG
(%)
STATION C & D 5 WEATHER 02
DEPTH 11.7 m WIND DIR
DATE 23 March '71 WIND SPEED
TIME 0850 SECCHI DISK
DEPTH
(m)
0.0
2.0
4.0
6.0
8.0
10.0
TEMP.
(C )
6.24
6.26
6.27
6.26
6.26
6.26
SAL
(%o)
1.32
1.27
1.27
1.23
1.26
1.26
SUSP
SED
(mg/l)
265.42
326.63
315.87
314.00
410.49
502. 3t
COMB
ORG
(%)
STATION C & D 6 WEATHER 02
DEPTH 12.2 m WIND DIR.
DATE 23 March '71 WIND SPEED 06 k
TIME 0835 SECCHI DISK
DEPTH
( m )
0.0
2.0
4.0
6.0
8.0
10.0
12.0
TEMP
(C )
6.21
6.23
6.24
6.24
6.24
6.24
6.24
SAL
tot \
\ /oo ;
1.20
1.24
1.21
1.21
1.24
1.24
1.24
SUSP
SED
(mg/l)
234.61
98.76
307.84
301.43
316.69
116.22
348.54
COMB
ORG
(%)
STATION C & D 7 WEATHER 01
DEPTH io.4 m WIND DIR 340°
DATE 23 March '71 WIND SPEED 13 k
TIME 0815 SECCHI DISK
DEPTH
(m)
0.0
2.0
4.0
6.0
8.0
10.0
TEMP
(C)
6.11
6.11
6.14
6.11
6.11
6.11
SAL
(%o)
1.32
1.36
1.28
1.35
1.37
1.32
SUSP
SED
(mg/ 1 )
239.24
283.58
238.12
208.18
305.89
208.44
COMB
ORG
(%)
STATION C & D 8 WEATHER
DEPTH 11.6 m Wl ND DIR
DATE 23 March '71 WIND SPEED
TIME 0800 SECCHI DISK
DEPTH
(m)
0.0
2.0
4.0
6.0
8.0
10.0
TEMP
(C )
6.12
6.14
6.14
6.14
6.14
6.12
SAL.
(7oo )
1.17
1.18
1.17
1.17
1.16
1.20
SUSP
SED
(mg/l)
220 .90
192.91
210.62
421.83
203.85
190.71
COMB
ORG
(%)
STATION D R 1 WEATHER
DEPTH WIND DIR
DATE WIND SPEED
TIME SECCHI DISK
DEPTH
( m )
TEMP
( C )
SAL
(%o)
SUSP
SED
(mg/l)
COMB
ORG
(%)
-------
STATION D R 2 WEATHER 01
DEPTH 12.2 m WIND DIR 010°
DATE 23 March '71 WIND SPEED 13 k
TIME 0750 SECCHI DISK
DEPTH
( m)
0.0
2.0
4.0
6.0
8.0
10.0
TEMP
(C)
6 .05
6.06
6.05
6.05
6.05
6.05
SAL
(%.)
1.64
1.68
1.80
2.04
2.03
1.97
SUSP
SED
(mg/l)
160.36
151.18
237.82
309 .08
357.14
392.90
COMB
ORG
(%)
STATION D R 3 WEATHER
DEPTH WIND DIR.
DATE WIND SPEED
TIME SECCHI DISK
DEPTH
(m)
TEMP.
(C )
SAL
(%.)
SUSP
SED
(mg/l)
COMB
ORG
(%)
STATION WEATHER
DEPTH WIND DIR
DATE WIND SPEED
TIME SECCHI DISK
DEPTH
( m )
TEMP
( C )
SAL
(%o)
SUSP
SED
(mg/l)
COMB
ORG
(%)
STATION WEATHER
DEPTH WIND DIR
DATE WIND SPEED
TIME SECCHI DISK
DEPTH
(m )
TEMP
(C)
SAL
(%o)
SUSP
SED
(mg/ 1 )
COMB
ORG
(%)
STATION WEATHER
DEPTH WIND DIR
DATE WIND SPEED
TIME SECCHI DISK
DEPTH
(m)
TEMP
(C )
SAL
(°/oo )
SUSP
SED
(mg/l)
COMB
ORG
(%)
STATION WEATHER
DEPTH WIND DIR
DATE WIND SPEED
TIME SECCH 1 DISK
DEPTH
( m )
TEMP
( C )
SAL
(%o)
SUSP
SED
(mg/l)
COMB
ORG
(%)
36
-------
STATION 924 QQ WEATHER
DEPTH WIND DIR
DATE WIND SPEED
TIME SECCHI DISK
DEPTH
( m)
TEMP
(C)
SAL
(%«)
SUSP
SED
(mg/l)
COMB
ORG
(%)
STATION 926 UU WEATHER 00
DEPTH 11.4m WIND DIR 320°
DATE 25 March '71 WIND SPEED 11 k
TIME 1115 SECCHI DISK
DEPTH
( m)
0.0
2 .0
4.0
6.0
8.0
10.0
TEMP.
(C )
3.51
3.48
3.46
3.4?
3.48
3.54
SAL
(%<=)
0.12
0.11
0.12
0.11
0.11
0.13
SUSP
SED
(mg/l)
29.45
30.81
33.42
31.89
38.00
53.54
COMB
ORG
(%)
STATION O.T. PT. WEATHER OC
DEPTH 11.6 pi WIND DIR 340C
DATE 25 March '71 WIND SPEED 13 k
TIME 1040 SECCHI DISK
DEPTH
( m )
0.0
2.0
4.0
6.0
8.0
10.0
TEMP
( C )
5.03
5.03
5.02
5.03
5.06
5.11
SAL
(%o)
0.11
0.13
0.11
0.13
0.13
0.12
SUSP
SED
(mg/ 1)
69.86
64.62
63.14
63.99
74.47
77.28
COMB
ORG
(%)
STATION C & D 1 WEATHER 00
DEPTH 11.6m WIND DIR 315°
DATE 25 March '71 WIND SPEED 06 k
TIME 1020 SECCHI DISK
DEPTH
(m )
0.0
2.0
4.0
6.0
8.0
10.0
TEMP
(C)
4.96
4.89
4.93
4.96
4 .94
4.95
SAL
(%o)
0.12
0.13
0.12
0.12
0.13
0.12
SUSP
SED
(mg/ 1 )
56.58
69.46
72.23
86.07
83.35
90.15
COMB
ORG
(%)
STATION C & D 2 WEATHER
DEPTH 12.8 m WIND DIR 315°
DATE 25 March '71 WIND SPEED 11 k
TIME 1000 SECCHI DISK
DEPTH
(m)
0.0
2.0
4.0
6.0
8.0
10.0
12.0
TEMP
(C )
5.16
5-11
5.13
5-12
5-13
5.13
5.13
SAL
(%,« )
0.13
0.13
0.13
0.12
0.13
0.14
0.14
SUSP
SED
(mg/l)
54.83
67.61
61.24
72.95
74.47
84.23
172.77
COMB
ORG
(%)
STATION C & D 3 WEATHER 00
DEPTH 11.6m WIND DIR ^150
DATE 25 March '71 WIND SPEED 10 k
TIME 09^5 SECCHI DISK
DEPTH
( m)
0.0
2.0
4.0
6.0
8.0
10.0
TEMP
( C )
5.07
5.06
5.06
5 .06
5-07
5-09
SAL
(%o)
0.13
0.15
0.14
0.15
0.15
0.13
SUSP
SED
(mg/l)
46.20
56.62
53.87
60.79
82.96
78.53
COMB
ORG
(%)
37
-------
STATION C & D 4 WEATHER 00
DEPTH !2.8 m WIND DIR 315°
DATE 25 March '71 WIND SPEED10 k
TIME 0920 SECCHI DISK
DEPTH
( m)
0.0
2.0
4.0
6.0
8.0
10.0
12.0
TEMP
(C)
5.08
5.07
5.07
5.08
5.08
5.09
5.10
SAL
(%o)
0.14
0.15
0.15
0.15
0.14
0.15
0.14
SUSP
SED
(mg/l)
57.83
67.14
79.63
80.03
87.54
86.96
113.62
COMB
ORG
(%)
STATION C & D 5 WEATHER 00
DEPTH 10.4 m WIND DIR 315°
DATE 25 March 'yiWIND SPEED 11 k
TIME 0900 SECCHI DISK
DEPTH
( m)
0.0
2.0
4.0
6.0
8.0
10.0
TEMP.
(C )
5.39
5.44
5.46
5.46
5.46
5.47
SAL
(%=)
0.14
0.12
0.16
0.14
0.15
0.15
SUSP.
SED
(mg/l)
76.47
85.85
102.16
103.10
111.44
149.66
COMB
ORG
(%)
STATION C & D 6 WEATHER 00
DEPTH 11.3 m WIND DIR 320°
DATE 25 March '71WIND SPEED 09 k
TIME 0840 SECCHI DISK
DEPTH
( m )
0.0
2.0
4.0
6.0
8.0
10.0
TEMP
(C )
5.52
5-56
5-57
5-57
5.58
5.58
SAL
(%.)
0.16
0.17
0.16
0.16
0.16
0.14
SUSP
SED
(mg/l)
111.67
135.47
146.02
178.02
218.60
245.44
COMB
ORG
(%)
STATION C & D 7 WEATHER uO
DEPTH 10.4 m WIND DIP 315°
DATE 25 March '71 WIND SPEED 11 k
TIME °8l5 SECCHI DISK
DEPTH
(m )
0.0
2.0
4.0
6.0
8.0
TEMP
(C)
5.60
5.62
5.64
5.64
5.65
SAL
(%o)
0.17
0. 17
0.18
0.15
0.17
SUSP
SED
(mg/l )
130 .4 7
188-38
205.00
189-42
255-01
COMB
ORG
(%)
STATION C & D 8 WEATHER 00
DEPTH 10.7 m WIND DIR 310°
DATE 25 March '71 WIND SPEED 10 k
TIME 0750 SECCHI DISK
DEPTH
(m)
0.0
2.0
4.0
6.0
8.0
10.0
TEMP
(C)
5.62
5.67
5-72
5.72
5.72
5.73
SAL
(% )
0.23
0.22
0.23
0.22
0.24
0.23
SUSP
SED
(mg/l)
185.34
202.19
204.26
223-61
228.80
240.19
COMB
ORG
(%)
STATION D R 1 WEATHER
DEPTH WIND DIR
DATE WIND SPEED
TIME SECCHI DISK
DEPTH
( m)
TEMP
( C )
SAL
(%o)
SUSP
SED
(mg/l)
COMB
ORG
(%)
38
-------
STATION D R 2 WEATHER 00
DEPTH 11.9 m WIND DIR 315°
DATE 25 March '71 WIND SPEED 19k
TIME 0730 SECCHI DISK
DEPTH
( m)
0.0
2.0
4.0
6.0
8.0
10.0
TEMP
(C)
5.97
6.04
6.09
6.08
6.08
6.09
SAL
0.35
0.34
0.34
0.37
0.35
0.37
SUSP
SED
(mg/l)
104.11
110.28
118.32
125.39
131.60
139.46
COMB
ORG
STATION D R 3 WEATHER
DEPTH WIND DIR
DATE WIND SPEED
TIME SECCHI DISK
DEPTH
(m)
TEMP
(C )
SAL
(%=)
SUSP
SED
(mg/l)
COMB
ORG
( %)
STATION WEATHER
DEPTH WIND DIR
DATE WIND SPEED
TIME SECCHI DISK
DEPTH
( m )
TEMP
(C )
SAL
(%<=)
SUSP
SED
(mg/l)
COMB
ORG
(%)
STATION WEATHER
DEPTH WIND DIR
DATE WIND SPEED
TIME SECCH 1 DISK
DEPTH
( m )
TEMP
(C)
SAL
(%o)
SUSP
SED
(mg/ 1 )
COMB
ORG
(%)
STATION WEATHER
DEPTH WIND DIR
DATE WIND SPEED
TIME S ECCH 1 DISK
DEPTH
(m)
TEMP
(C )
SAL
(7oo )
SUSP
SED
(mg/l)
COMB
ORG
(%)
STATION WEATHER
DEPT H WIND DIR
DATE WIND SPEED
TIME SECCHI DISK
DEPTH
( m )
TEMP
( C )
SAL
(%o)
SUSP
SED
(mg/l)
COMB
ORG
( %)
39
-------
STATION 924 QQ WEATHER 01
DEPTH 12.0 m WIND DIR 315°
DATE 30 March '71 WIND SPEED 14 k
TIME 1230 SECCHI DISK
DEPTH
( m)
0.0
2.0
4.0
6.0
8.0
10.0
TEMP
(C)
5.68
5.61
5.60
5.61
5.63
5.67
SAL
(%o)
0.14
0.14
0.14
0.14
0.15
0.16
SUSP
SED
(mg/l)
36.43
36.62
40.68
40.72
42.00
42.59
COMB
ORG
(%)
STATION 926 UU WEATHER 01
DEPTH 11.3 m WIND DIR 315°
DATE 30 March '71WIND SPEED 10 k
TIME 1300 SECCHI DISK
DEPTH
(m)
0.0
2.0
4.0
6.0
8.0
10.0
TEMP.
(C )
6.21
6.20
6.18
6.14
6.15
6.20
SAL
(%o)
0.13
0.13
0.13
0.14
0.14
0.14
SUSP
SED
(mg/l)
31.77
32.58
33.41
34.83
40.31
39.56
COMB
ORG
( %)
STATION Q T FT WEATHER 01
DEPTH 12.3 m WIND DIR 315°
DATE. 30 March '71 WIND SPEED 15 k
TIME 1340 SECCHI DISK
DEPTH
( m )
0.0
2.0
4.0
6.0
8.0
10.0
12.0
TEMP
(C )
6.21
6.21
6.24
6.24
6.23
6.17
6.18
SAL
(%o)
0.47
0.46
0.48
0.50
0.50
0.49
0.49
SUSP
SED
(mg/l)
64.94
72.56
68.47
71.98
89.10
105.93
COMB
ORG
(%)
STATION C & D 1 WEATHER 01
DEPTH 12.2 m WIND DIR 340°
DATE 30 March '71WIND SPEED 08 k
TIME 1405 SECCHI DISK
DEPTH
(m)
0.0
2.0
4.0
6.0
8.0
10.0
TEMP
(C)
6.31
6.31
6.31
6.34
6.38
6.46
SAL
(%o)
0.70
0.71
0.71
0.73
0.75
0.78
SUSP
SED
(mg/l )
66.04
75.47
75.57
95.14
100.85
110.72
COMB
ORG
(%)
STATION C & D 2 WEATHER 01
DEPTH 12.2 m WIND DIR 315°
DATE 30 March '71 WIND SPEED 17 k
TIME 1425 SECCHI DISK
DEPTH
(m)
0.0
2.0
4.0
6.0
8.0
10.0
12.0
TEMP
(C )
6.28
6.28
6. 30
6.30
6. 30
6.34
6.36
SAL
(%> )
0.80
0.80
0.82
0.81
0.81
0.82
0.82
SUSP
SED
(mg/l)
76.81
80. 32
97.13
92.13
100.17
105.45
COMB
ORG
(%)
STATION C & D 3 WEATHER 01
DEPTH 12.0 n WIND DIR 315°
DATE 30 March '71WIND SPEED 16 k
TIME 1445 SECCHI DISK
DEPTH
( m)
0.0
2.0
4.0
6.0
8.0
10.0
TEMP
( C )
5.63
5.65
5.62
5.61
5.61
5.62
SAL
(%)
0.87
0.86
0.87
0.87
0.87
0.87
SUSP
SED
(mg/l)
75.89
70.65
82.76
86.95
91.93
98.25
COMB
ORG
(%)
40
-------
STATION C & D 4 WEATHER 01
DEPTH 12.2 m WIND DIR 315°
DATE 30 March '71 WIND SPEED 03 k
TIME 1500 SECCHI DISK
DEPTH
( m )
0.0
2 .0
4.0
6.0
8.0
10.0
12.0
TEMP
(C )
6.1)1
6 .40
6.40
6.40
6.41
6.41
6.43
SAL
(%o)
0 .92
0.91
o .92
o .91
0.91
0.92
0.91
SUSP
SED
(mg/l)
77-78
84.73
87.96
104.92
105 .28
116 .43
COMB
ORG
(%)
STATION C & D 5 WEATHER 01
DEPTH 11.5 n WIND DIR 300°
DATE 30 March '71 WIND SPEED 12 k
TIME 1530 SECCHI DISK
DEPTH
(m)
0 .0
2. 0
4.0
6.0
8.0
10.0
TEMP
(C )
6.51
6.51
6.52
6.51
6.47
6.47
SAL
(%o)
0.97
o .96
o .96
0.97
0.97
0.97
SUSP
SED
(mg/l)
75-13
79-13
89 .00
93-56
127-96
139-82
COMB
ORG
( %)
STATION C & D 6 WEATHER 01
DEPTH 11.0 m WIND DIR 320°
DATE 30 March '71 WIND SPEED 02 k
TIME 1545 SECCHI DISK
DEPTH
( m )
0 .0
2.0
4.0
6 .0
8.0
10.0
TEMP
(C )
6.46
6.48
6.47
6.45
6.43
6.43
SAL
(%o)
1.07
1.07
1.0-7
1.08
1.08
1.09
SUSP
SED
(mg/l)
75.78
78.46
85.86
121.54
125.96
COMB
ORG
(%)
STATION C & D 7 WEATHER 01
DEPTH 9.8m WIND DIR 315°
DATE 30 March '71 WIND SPEED 17 k
TIME 1610 SECCHI DISK
DEPTH
(m )
0.0
2.0
4.0
6.0
8.0
TEMP
(C)
6.38
6.40
6.41
6.41
6.39
SAL
(%o)
1.20
1.20
1.20
1.20
1.23
SUSP
SED
(mg/l )
75.57
88.11
87.06
106 .53
108.17
COMB
ORG
(%)
STATION C & D 8 WEATHER 01
DEPTH 11.0 m WIND OIR 3^0°
DATE 30 March '71 WIND SPEED 13 k
TIME 1630 SECCHI DISK
DEPTH
(m)
0.0
2 .0
4.0
6.0
8.0
TEMP
(C )
6.56
6.59
6.59
6 .60
6.61
SAL
("/.. )
1.42
1.41
1.41
1.42
1.42
SUSP
SED
( mg/l)
150.42
219.72
293-91
266.84
73.07
COMB
ORG
(%)
STATION D R 1 WEATHER
DEPTH WIND DIR
DATE WIND SPEED
TIME SECCH 1 DISK
DEPTH
( m)
TEMP
( C )
SAL
(%o)
SUSP
SED,
(mg/l)
COMB
ORG
(%)
41
-------
STATION D R 2 WEATHER 01
DEPTH 12.3 m WIND DIR 340°
DATE 30 March '71 WIND SPEED 16 k
TIME 1640 SECCHI DISK
DEPTH
( m)
0.0
2.0
4.0
6.0
8.0
10.0
12.0
TEMP
(C)
6.31
6.31
6.30
6.29
6.28
6.27
6.26
SAL.
(%o)
1.45
1.45
1.51
1.57
1.63
1.67
1.72
SUSP
SED
(mg/l)
71.18
72.83
76.41
82.80
100.22
106.46
COMB
ORG
(%)
STATION D R 3 WEATHER 01
DEPTH 12.8 m WIND DIR 315°
DATE 30 March '71 WIND SPEED 15 k
TIME 1720 SECCHI DISK
DEPTH
(m)
0.0
2.0
4.0
6.0
8.0
10.0
12.0
TEMP.
(C )
6.54
6.53
6.55
6.53
6.49
6.48
6.46
SAL
(%o)
0.68
0.68
0.69
0.71
0.76
0.80
0.86
SUSP
SED
(mg/l)
COMB
ORG
(%)
STATION WEATHER
DEPTH WIND DIR
DATE WIND SPEED
TIME SECCHI DISK
DEPTH
( m)
TEMP
(C)
SAL
(%o)
SUSP
SED
(mg/l)
COMB
ORG
(%)
STATION WEATHER
DEPTH WIND DIR
DATE WIND SPEED
TIME SECCHI DISK
DEPTH
(m )
TEMP
(C)
SAL
(%o)
SUSP
SED
(mg/l )
COMB
ORG
(%)
STATION WEATHER
DEPTH WIND DIR
DATE WIND SPEED
TIME SECCHI DISK
DEPTH
(m)
TEMP
(C )
SAL
(%><, )
SUSP
SED
(mg/l)
COMB
ORG
(%)
STATION WEATHER
DEPTH W IND DIR
DATE W
ND SPEED
TIME SECCH 1 DISK
DEPTH
( m )
TEMP
( C )
SAL
(%,,)
SUSP
SED
(mg/l)
COMB
ORG
(%)
42
-------
STATION 924 QQ WEATHER 0 4
DE PTH 13.7m WINDDIR
DATE 18 Aug. '71 WIND SPEED 03 k
TIME 1300 SECCHI DISK
DEPTH
( m )
0.0
2 .0
4.0
6.0
8.0
10.0
11.0
TEMP
(C }
26.88
26.69
26.41
26 . 32
26.30
26.27
26 .27
SAL
(%o)
0.81
0.88
0.98
1.10
1.31
1.81
1.87
SUSP
SED
(mg/l)
11.62
14.16
21.26
19.06
21.45
33.71
39.62
COMB
ORG
(%)
STATION 026 IU WEATHER 04
DEPTH 13.7m WINDDIR 000°
DATE 18 ;,Ug.. 171 WIND SPEED 03 k
TIME 1328 SECCHI DISK
DEPTH
( m)
0 . 0
2 .0
'4.0
6 .0
8.0
10.0
10 .8
11.1
TEMP
(C )
26.38
26 .52
26.52
26.50
26. 39
26 .40
SAL
(%o)
0 .51
0.52
0.53
0.55
0.60
0 .59
SUSP
SED
( mg/l)
25.63
28.12
31.79
35.59
41.91
303.13
COMB
ORG
( %)
STATION 0 1 FT WEATHER 01
DEPTH 14.6 m WIND DIR
DATE 18 Aug. '71 WIND SPEED 00 k
TIME 1400 SECCHI DISK
DEPTH
( m )
0.0
2.0
4.0
6.0
8.0
10.0
12.0
TEMP
( C )
27.71
27.06
26.87
26.87
26.91
26.92
26 .96
SAL
(%o)
0.90
0 .91
0 .96
0.98
1.02
1.05
1.04
SUSP
SED
(mg/l)
21.76
24 .54
29.19
29 .64
34.42
41.95
60 .98
COMB
ORG
(%)
STATION C & D 1 WEATHER 04
DEPTH 14 .6 m WINDDIR
DATE 18 Aug. '71 WIND SPEED 00 k
TIME 1420 SECCHI DISK
DEPTH
(m )
0 .0
2 .0
4.0
6.0
8.0
10 .0
11.6
TEMP
(C)
27.45
27.19
26.90
26.86
26 .84
26.83
26.87
SAL
(%)
1.06
1.05
1.09
1.10
1. 10
1.09
1.10
SUSP
SED
(mg/ 1 )
19 .20
21.00
20 .91
25.21
29 .00
29.30
50 .88
COMB
ORG
(%)
STATION C & D 2 WEATHER 04
DEPTH 13.2m WIND DIR
DATE 18 Aug. '71 WIND SPEED 00 k
TIME 1445 SECCH 1 DISK
DEPTH
(m)
0 .0
2.0
4.0
6.0
8.0
10.0
12.7
TEMP
(C )
27.28
27.05
27.03
27.04
27.02
26.94
27.06
SAL
(%, )
1.26
1.27
1.27
1.27
1.26
1.28
1.29
SUSP
SED
(mg/l)
20.25
19 .42
21.29
20.65
20.35
25.51
52.05
COMB
ORG
(%)
STATION C & D 3 WEATHER 04
DEPTH 13.4 m WIND DIR 090°
DATE 18 Aug. '71 WIND SPEED 05 k
TIME 1519 SECCHI DISK
DEPTH
( m )
0 .0
2.0
4.0
6.0
8.0
10.0
10.9
TEMP
( C )
27.27
27.06
27.00
27.00
26.98
26.91
26 .92
SAL
(%.)
1.37
1.40
1.36
1.36
1.37
1.39
1.38
SUSP
SED
(mg/l)
20.09
21.26
20 .17
19.93
21.02.
35.12
380 .69
COMB
ORG
(%)
43
-------
STATION C & D 4 WEATHER 0 4
DEPTH 14.3 m WIND DIR 090°
DATE 18 Aug. '71 WIND SPEED 07 k
TIME 1533 SECCHI DISK
DEPTH
( m )
0.0
2.0
4.0
6.0
8.0
10.0
11.5
TEMP
(C)
27.27
27.00
26 .92
26.90
26.85
26.84
26.87
SAL
(%o)
1.48
1.53
1.53
1.56
1.5^
1.58
1.60
SUSP
SED
(mg/l)
23.90
18.62
19.95
25.76
34.14
46.08
149.54
COMB
ORG
(%)
STATION C & D 5 WEATHER 04
DEPTH 12.5 m WIND DIR 090°
DATE 18 Aug. '71 WIND SPEED 06 k
TIME 1550 SECCHI DISK
DEPTH
(m)
0 .0
2.0
4.0
6.0
8.0
10 .0
12.3
TEMP
(C )
27.23
27.06
26 .98
26 .94
26 .94
26.9^
26 .92
SAL
(%o)
1.83
1.89
1.92
1.93
1.95
1.95
1.95
SUSP
SED
(mg/l)
17.49
29.64
62.11
84.94
76.96
101.13
232.13
COMB.
ORG
( %)
STATION C & D 6 WEATHER Q2
DEPTH 12.0 m WIND DIR 090°
DATE 18 Aug. '71 WIND SPEED 05 k
TIME 1610 SECCHI DISK
DEPTH
( m )
0 .0
2.0
4.0
6.0
8.0
10.0
TEMP
(C )
26.96
26.06
26.94
26.93
26.93 '
26.95
SAL
(%o)
2 .21
2.22
2.24
2.27
2.28
2.32
SUSP
SED
(mg/l)
70.16
87.59
91.97
118.53
161.33
265.29
COMB
ORG
(%)
STATION C & D 7 WEATHER 01
DEPTH 11.0 m WIND DIR 090°
DATE 18 Aug. '71 WIND SPEED 06 k
TIME 1620 SECCHI DISK
DEPTH
(m )
0 .0
2.0
4.0
6.0
8.5
TEMP
(C)
26.99
26.98
26.99
26.99
27.02
SAL
(%°)
2 .69
2.71
2.72
2.73
2.74
SUSP
SED
(mg/ 1 )
56.58
81.95
110 .05
134.41
192.43
COMB
ORG
(%)
STATION C & D 8 WEATHER 01
DEPTH 12 . 2 n WIND DIR
DATE 18 Aur. '71 WIND SPEED
TIME 1635 SECCHI DISK
DEPTH
(m)
0.0
2 .0
4.0
6.0
8.0
10.3
TEMP
(C )
26.91
26.95
26 .94
26 .93
26 .92
26 .90
SAL
(%,,, )
3.21
3.13
3.10
3.10
3.09
3.10
SUSP
SED
(mg/l)
99.13
119.58
129.95
143.46
144.61
155.83
COMB
ORG
(%)
STATION D R 1 WE
DEPTH 13.0 n Wl
DATE 18 Aug. '71 W
TIME 1715 SE
DEPTH
( m )
0 .0
2.0
4.0
6.0
8.0
10 .0
12.8
TEMP
( C )
27.02
27.10
27.11
27.11
27.12
27.13
27.09
SAL
(%°)
1.02
1.06
1.06
1.08
1.09
1.10
1.20
ATHER
ND DIR 230°
ND SPEED 10 k
CCHI DISK
SUSP
SED
(mg/l)
49.08
51.84
78.56
85.28
84.87
98.60
167.20
COMB
ORG
(%)
44
-------
STATION D R 2 WEATHER 01
DEPTH 16.5 rn WIND DIR 225°
DATE 18 Aug. '71 WIND SPEED 12 k
TIME 1645 SECCHI DISK
DEPTH
( m)
0.0
2.0
4.0
6.0
8 . 0
10 .0
12.0
13-5
TEMP
(C)
27.00
27.00
26.06
26.94
26.97
27-08
27.11
27.11
SAL
(%o)
1.74
1.89
1.95
2.15
2.19
2.30
2.62
2.74
SUSP
SED
(mg/l)
36.22
52.13
60.02
85.82
93.07
119.58
119.78
COMB
ORG
(%)
STATION D R 3 WEATHER 01
DEPTH ll|. 2 m WIND DIR 200°
DATE 18 Aug. '71 WIND SPEED 15 k
TIME 1805 SECCHI DISK
DEPTH
( m)
0.0
2 .0
4.0
6.0
8.0
10.0
12.0
14.0
TEMP
(C )
26 .46
26 .1)8
26 .44
26.43
26 . 42
26 .44
26 .45
26 .41
SAL
(%.)
3.78
3-79
4 .25
4.52
4.82
4.89
4 .92
4 .90
SUSP
SED
(mg/l)
22 .04
23.97
24. 84
31.84
61.53
65.95
115.21
572.62
COMB
ORG
( % )
STATION WEATHER
DEPTH WIND DIR
DATE WIND SPEED
TIME SECCHI DISK
DEPTH
( m )
TEMP
(C )
SAL
(%o)
SUSP
SED
(mg/l)
COMB
ORG
(%)
STATION WEATHER
DE PTH WIND DIR
DATE WIND SPEED
TIME SECCH 1 DISK
DEPTH
(m )
TEMP
(C)
SAL
(%°)
SUSP
SED
(mg/ 1 )
COMB
ORG
(%)
STATION WEATHER
DEPTH WIND DIR
DATE WIND SPEED
TIME SECCHI DISK
DEPTH
(m)
TEMP
(C )
SAL
(% )
SUSP
SED
(mg/l)
COMB
ORG
(%)
STATION WEATHER
DEPTH WIND DIR
DATE WIND SPEED
TIME SECCHI DISK
DEPTH
( m )
TEMP
( C )
SAL
(%»)
SUSP
SED
(mg/l)
COMB
ORG
(%)
45
-------
STATION 924 QQ WEATHER 06
DEPTH 13.7 ra WIND DIR 090°
DATE 27 Aug. '71 WIND SPEED Q7 k
TIME 0602 SECCHI DISK
DEPTH
( m)
0.0
2.0
4.0
6.0
8.0
10.0
12.3
TEMP.
(C)
24.74
24.85
24.92
24.94
25.02
25.08
25.08
SAL
(%o)
0.97
1.08
1.33
1.58
1.98
2.51
2.76
SUSP
SED
(mg/0
11.08
11.23
11.62
15.05
13-74
20.49
42.93
COMB
ORG
(%)
STATION 926 UU WEATHER 06
DEPTH 13<1 m WIND DIR 090°
DATE 27 Aug. '71 WIND SPEED 06 k
TIME 0630 SECCHI DISK
DEPTH
(m)
0.0
2.0
4.0
6.0
8.0
10.0
11.6
TEMP.
(C )
25.13
25.14
25.11
25.13
25-13
25.08
25.10
SAL
(%o)
0.53
0.53
0.55
0.59
0.6?
1.34
1.57
SUSP
SED
(mg/l)
20.26
21.96
22.00
22.83
28.80
99.21
98.77
COMB.
ORG
1%)
STATION 0 T PT. WEATHER 06
DEPTH 14.0m WIND DIR 115°
DATE 27 Aug. '71 WIND SPEED 04 k
TIME 0720 SECCHI DISK
DEPTH
( m )
0.0
2.0
4.0
6.0
8.0
10.0
12.3
TEMP
(C )
25.35
25.40
25.39
25.39
25-39
25.40
25.40
SAL
(%.)
0.83
0.82
0.81
0.85
0.82
0.82
0.82
SUSP
SED
(mg/l)
19.17
25.54
28.15
27.82
32.68
40.26
47.95
COMB
ORG
(%)
STATION C & D 1 WEATHER 06
DEPTH 13- 4 m WIND DIR
DATE 27 Aug. '71 WIND SPEED
TIME 0740 SECCHI DISK
DEPTH
(m )
0.0
2.0
4.0
6.0
8.0
10.0
12.0
TEMP
(C)
25.30
SAL
(%o)
0.86
SUSP
SED
(mg/ 1 )
31.55
26.52
COMB
ORG
(%)
STATION C & D 2 WEATHER 06
DEPTH WIND DIR
DATE 27 Aug. '71 WIND SPEED
TIME 0920 SECCHI DISK
DEPTH
(m)
0.0
2.0
4.0
6.0
8.0
10.0
12.5
TEMP
(C )
25.41
25.41
25.42
25.43
25.43
25.44
25.36
SAL
("/.. )
1.02
1.00
1.01
1.01
1.00
0.99
0.99
SUSP
SED
(mg/l)
23.61
36.53
50.06
60.95
6l.4g
62.92
135.75
COMB
ORG
(%)
STATION C & D 3 WEATHER 06
DEPTH 12.8 m WIND DIR 2^5°
DATE 27 Aug. '71 WIND SPEED. 03 k
TIME 0935 SECCHI DISK
DEPTH
( m)
0.0
2.0
4.0
6.0
8.0
10.0
11.5
TEMP
(C )
25.54
25.54
25.54
25.55
25-55
25.55
25.55
SAL
(%o)
1.09
1.09
1.10
1.10
1.10
1.10
1.09
SUSP
SED
(mg/0
29.64
33.56
31.87
32.27
38.67
42.82
'703.10
COMB
ORG
(%)
46
-------
STATION c St D 4 WEATHER 06
DE PTH 12. 8 m WIND DIR
DATE 27 Aug. '71 WIND SPEED 00 k
TIME 0945 SECCHI DISK
DEPTH
( m )
0.0
2.0
4.0
6.0
8.0
10.0
11.5
TEMP
(C }
25.58
25.59
25.60
25 .61
25.61
25.60
25.59
SAL
(%o)
1.20
1.21
1.20
1.20
1.21
1.20
1.19
SUSP
SED
(mg/l)
24.51
34.94
51.56
51.64
61.04
71.56
162.28
COMB
ORG
(%)
STATION C & D 5 WEATHER 06
DEPTH 14.3 m WIND DIR 245°
DATE 27 Aup.. '71 WIND SPEED 13 k
TIME 1005 SECCHI DISK
DEPTH
( m)
0.0
2.0
1.0
6.0
8.0
10.0
12.0
13-0
TEMP
(C )
25-53
25-69
25. 70
25.71
25.72
25.72
25.72
25-69
SAL
(%o)
1.76
1.99
2.00
2.12
2.14
2.19
2.23
2.21
SUSP
SEO
(mg/l)
28.39
49.54
66.74
83.83
107.95
109.37
111.08
545.81
COMB
ORG
( % )
STATION C & D 6 WEATHER 06
DEPTH 12.2 ra WIND DIR
DATE 27 Aug. '71 WIND SPEED 13 k
TIME 1015 SECCHI DISK
DEPTH
( m )
0.0
2.0
4.0
6.0
8.0
10.7
TEMP
(C )
25.48
25.50
25.50
25.45
25.50
25.42
SAL
(%«)
2.66
2.69
2.84
2.91
2.96
3.26
SUSP
SED
(mg/ 1)
63.68
74.42
85.25
94.90
100.67
109.09
COMB
ORG
(%)
STATION C & D 7 WEATHER 06
DEPTH 11.0 m WIND DIR 270°
DATE 27 Aug. '71 WIND SPEED 10 k
TIME 1030 SECCHI DISK
DEPTH
(m )
0.0
2.0
4.0
6.0
8.0
10.0
TEMP
(C)
25.07
25.08
25.09
25.11
25.12
25.04
SAL
(%o)
4.02
4.02
4.01
4.04
4.08
4 .05
SUSP
SED
(mq/ 1 )
59.97
53.59
71.31
67.71
96.90
96.59
COMB
ORG
(%)
STATION C & D 8 WEATHER 06
DEPTH 12.2 ra WIND DIR 270°
DATE 27 Aug. '71 WIND SPEED 10 k
TIME 1045 SECCHI DISK
DEPTH
(m)
0.0
2.0
4.0
6.0
8.0
10.0
TEMP
(C )
24.77
24. 71
24.71
24.72
24.73
24.70
SAL
(%, )
4.80
4.87
4.87
4.86
4.86
4.81
SUSP
SED
(mg/l)
86.79
101.59
109.13
109.71
117.77
128.57
COMB
ORG
(%)
STATION D R 1 WEATHER
DEPTH WIND DIR
DATE WIND SPEED
TIME SECCHI DISK
DEPTH
( m)
TEMP
(C )
SAL
(%<,)
SUSP
SED
(mg/l)
COMB
ORG
(%)
47
-------
STATION D R 2 WEATHER 06
DEPTH 15.8 m WIND DIR 270°
DATE 27 Aug. '71 WIND SPEED I1* k
TIME 105U SECCHI DISK
DEPTH
( m )
0 .0
2.0
14.0
6.0
8.0
10 .0
12.0
13.5
TEMP
(C)
25.20
25 .18
25 .I1*
25 .16
25 .16
25 . 10
2h .gh
2h .96
SAL
(%o)
2.57
2.67
2.92
2.91
2.99
3.59
U. 65
14.61
SUSP
SED
(mg/0
26 .02
30 .00
It It. 11
^0.75
>t3.98
57.91
110.35
1(38.72
COMB
ORG
(%)
STATION D R 3 WEATHER
DEPTH WIND DIR
DATE WIND SPEED
TIME SECCHI DISK
DEPTH
( m)
TEMP
(C )
SAL
(%o)
SUSP
SED
(mg/l)
COMB
ORG
(%)
STATION WEATHER
DEPTH WIND DIR
DATE WIND SPEED
TIME SECCHI DISK
DEPTH
( m )
TEMP
(C )
SAL
(%o)
SUSP
SED
(mg/l)
COMB
ORG
(%)
STATION WEATHER
DEPTH WIND DIR.
DATE WIND SPEED
TIME SECCHI DISK
DEPTH
(m )
TEMP
(C)
SAL
(%)
SUSP
SED
(mg/ 1 )
COMB
ORG
(%)
STATION WEATHER
DEPTH WIND DIR
DATE WIND SPEED
TIME SECCHI DISK
DEPTH
(m)
TEMP
(C )
SAL
(7oo )
SUSP
SED
(mg/l)
COMB
ORG
(%)
STATION WEATHER
DEPTH WIND DIR
DATE WIND SPEED
TIME SECCHI DISK
DEPTH
( m)
TEMP
( C )
SAL
(%o)
SUSP
SED
(mg/l)
COMB
ORG
(%)
48
-------
STATION 9214 QO WEATHER 04
DEPTH 12.5 rn WIND DIR 135°
DATE 8 Sept. '71 WIND SPEED 05 k
TIME 0405 SECCHI DISK
DEPTH
( m )
0.0
2.0
4.0
6.0
8.0
10.0
11.0
TEMP
(C)
25.06
25.09
25 .20
25.17
25.01
25.07
25.08
SAL
(%o)
1.30
1.35
1.52
1.62
1.86
2.05
2.04
SUSP
SED
( mg/l)
10.73
14.37
16.36
20.82
29.02
392 .04
57-93
COMB
ORG
(%)
STATION 926 UU WEATHER
DEPTH H.6 m WIND DIR 150°
DATE 8 Sept. '71 WIND SPEED 05 k
TIME 0443 SECCHI DISK
DEPTH
(m)
0 .0
2.0
4.0
6.0
8.0
10 .0
TEMP
(C )
25 .42
25 .41
25.38
25.36
25.33
SAL
(%o)
0.61
0 .62
0.62
0 .62
0.63
SUSP
SED
(mg/l)
33.87
27.93
29 .96
37.02
59 . 46
89. 82
COMB
ORG
(%)
STATION 0 T PT WEATHER
DEPTH 11.6 m WIND DIR 090°
DATE 8 Sept. '71 WIND SPEED 04 k
TIME 0525 SECCHI DISK
DEPTH
( m )
0.0
2.0
4.0
6.0
7.0
TEMP
(C )
25.59
25.62
25.60
25.58
25.53
SAL
(%o)
0.70
0.70
0.70
0.70
0.70
SUSP
SED
(mg/ 1)
24.25
32.63
5^.87
58.95
55.83
COMB
ORG
(%)
STATION C & D 1 WEATHER 04
DEPTH 12.5 m WIND DIR 150°
DATE 8 Sept. '71 WIND SPEED 03 k
TIME 0550 SECCHI DISK
DEPTH
( m )
0.0
2.0
4.0
6.0
8.0
10.0
11.0
TEMP
(C)
25.55
25-54
25.52
25.^9
25. 44
25.43
25.41
SAL
(%o)
0.73
0.74
0.75
0.77
0.79
0.79
0.79
SUSP
SED
(mg/ 1 )
24 .07
26 .49
27.70
31.19
34.86
42 .87
45.79
COMB
ORG
(%)
STATION C & D 2 WEATHER 04
DEPTH 12.5 m WIND DIR
DATE 8 Sept. '71 WIND SPEED
TIME 0618 SECCHI DISK
DEPTH
(m)
0.0
2.0
4.0
6.0
8.0
10.0
12.0
TEMP
(C )
25.20
25.22
25.22
25.20
25.17
25.17
25.16
SAL
(%>. )
1.12
1.12
1.13
1.17
1.20
1.22
1.23
SUSP
SED
(mg/l)
29.39
29.02
31.42
35.91
50.57
41.00
54.69
COMB
ORG
(%)
STATION C & D 3 WE
DEPTH 11.6 m Wl
DATE 8 Sept. '71 W
TIME 0640 SE
DEPTH
( m)
0.0
2.0
4.0
6.0
8.0
10.0
TEMP
( C )
25.09
25-17
25.16
25.16
25-15
25.05
SAL
(%o)
1.60
1.66
1.72
1.81
1.84
1.85
.ATHER 04
ND DIR
ND SPEED
CCHI DISK
SUSP
SED
(mg/l)
19 .46
22.47
23.08
27-31
36.74
51.34
COMB
ORG
(%)
49
-------
STATION C & D 4 WEATHER 04
DEPTH 12.5 m WIND DIR
DATE 8 Sept. '71 WIND SPEED
TIME 0655 SECCHI DISK
DEPTH
( m)
0.0
2.0
4.0
6.0
8.0
10.0
11.0
TEMP.
(C)
-
25.11
25.12
25.12
25.11
25.11
25-00
SAL
(%o)
-
2.18
2.26
2.31
2.37
2.40
2.40
SUSP
SED
(mg/l)
19.11
26.48
24.51
26.09
26.62
38.70
56.68
COMB
ORG
(%)
STATION C & D 5 WEATHER 04
DEPTH 12 . 8 ra WIND DIR
DATE 8 Sept. '71 WIND SPEED
TIME 0715 SECCHI DISK
DEPTH
(m)
0.0
2.0
4.0
6.0
8.0
10.0
11.0
TEMP
(C )
-
25.11
25. 12
25.11
25.11
25.11
25.03
SAL
(%o)
-
2.65
2.65
2.65
2.64
2.64
2.65
SUSP
SED
(mq/l)
56.02
49.91
91.89
131.81
113-13
111.23
173-78
COMB
ORG
(%)
STATION C & D 6 WEATHER 04
DEPTH 10.6 m WIND DIR
DATE 8 Sept. '71 WIND SPEED
TIME 0730 SECCHI DISK
DEPTH
( m )
0.0
2.0
4.0
6.0
8.0
10.0
TEMP
(C )
25.08
25.14
25.14
25.14
25.11
25.00
SAL
(%o)
2.79
2.78
2.79
2.79
2.79
2.80
SUSP
SED
(mg/l)
101.97
108.56
104. 76
101.11
117.^0
196.70
COMB
ORG
(%)
STATION C & D 7 WEATHER 04
DE PTH 9.8m WIND OIR
DATE 8 Sept. '71 WIND SPEED
TIME 0748 SECCHI DISK
DEPTH
(m )
0.0
2.0
4.0
6.0
8.0
9.0
TEMP
(C)
25.02
25.02
24.97
24.99
25.01
25.00
SAL
(%)
2.99
2.98
2.98
2.97
2.95
2.09
SUSP
SED
(mg/ 1 )
17?. 97
172.8]
167.29
220. 74
P56.38
335.79
COMB
ORG
STATION C & D 8 WEATHER 04
DEPTH 11. 3 rn WIND DIR
DATE 8 Sept. '71 WIND SPEED
TIME 0800 SECCHI DISK
DEPTH
(m)
0.0
2.0
4.0
6.0
8.0
10.0
TEMP
(C )
25.01
25.01
25.02
25.06
25.04
24.96
SAL
(%o )
3.00
3.01
3.00
3.02
3.00
3.01
SUSP
SED
(mg/l)
192.23
210.27
238.22
258.70
254.90
262.24
COMB
ORG
(%)
STATION D R 1 WEATHER
DE PT H Wl N D DIR
DATE W
ND SPEED
TIME SECCH 1 DISK
DEPTH
( m)
TEMP
( C )
SAL
(%o)
SUSP
SED
(mq/l)
COMB
ORG
(%)
50
-------
STATION D R 2 WEATHER 02
DEPTH 12.0 m WIND DIR 240°
DATE 8 Sept. '71 WIND SPEED 05 k
TIME 0815 SECCHI DISK
DEPTH
( m )
0.0
2.0
4.0
6.0
8.0
10.0
11.5
TEMP
(C )
25.17
25.17
25-19
25.19
25.19
25.19
25.17
SAL
(%o)
1.30
1.32
1.38
1.38
1.41
1.50
1.51
SUSP
SED
(mg/l)
72.30
85.03
115.^8
136.84
155-27
195.77
536.86
COMB
ORG
(%)
STATION D R 3 WEATHER 04
DEPTH 14.6 m WIND DIR
DATE 8 Sept. '71 WIND SPEED 00 k
TIME 0855 SECCHI DISK
DEPTH
(m)
0.0
2.0
4.0
6.0
8.0
10.0
12 .0
TEMP
(C )
25.10
25.07
25.07
25.05
25.06
25.02
25.05
SAL
(%o)
0.48
0.48
O.tg
0.49
0.49
0.45
0.46
SUSP
SED
(mg/l)
55.68
82.22
80.70
101.43
117.49
231.51
465.07
COMB
ORG
( %)
STATION WEATHER
DEPTH WIND DIR
DATE WIND SPEED
TIME SECCHI DISK
DEPTH
1 m )
TEMP
( C )
SAL
(%o)
SUSP
SED
(mg/l)
COMB
ORG
(%)
STATION WEATHER
DEPTH WIND DIR
DATE WIND SPEED
TIME SECCHI DISK
DEPTH
(m )
TEMP
(C)
SAL
(%o)
SUSP
SED
(mg/ 1 )
COMB
ORG
(%)
STATION WEATHER
DEPTH WIND DIR
DATE WIND SPEED
TIME SECCHI DISK
DEPTH
(m)
TEMP
(C)
SAL
(%> )
SUSP
SED
(mg/l)
COMB
ORG
(%)
STATION WEATHER
DEPTH WIND DIR
DATE WIND SPEED
TIME SECCHI DISK
DEPTH
( m)
TEMP
( C )
SAL
(7oo)
SUSP
SED
(mg/l)
COMB.
ORG
(%)
51
-------
STATION 924 QQ WEATHER 00
DEPTH 13.14 m WIND DIR 045°
DATE 19 Oct. '71 WIND SPEED 13 k
TIME il)20 SECCHI DISK
DEPTH
( m )
0.0
2.0
4.0
6.0
8.0
10.0
12.5
12.6
TEMP
(C)
17.77
17.68
17.49
17.52
17.73
17.98
18.17
SAL
(%o)
1.52
1.56
1.79
2.10
3.61
4.52
4.88
SUSP
SED
(mg/l)
16.12
15.01
13.89
12.99
12.89
18.57
26.05
COMB
ORG
(%)
STATION 926 UU WEATHER 00
DEPTH 12.8 m WIND DIR 045°
DATE 19 Oct. '71 WIND SPEED 12 k
TIME 1446 SECCHI DISK
DEPTH
( m)
0.0
2.0
JJ.O
6.0
8.0
10.0
11.0
TEMP
(C )
17-90
17.90
17-90
17-91
17.92
17.91
17.99
SAL
(%o)
1.86
1.88
1.86
1.87
1.87
1.87
1.88
SUSP
SED
(mg/l)
35.86
40.77
45.96
50.71
53-77
60.55
79.64
COMB
ORG
(%)
STATION 0 T PT WEATHER 00
DEPTH 13.1 m WIND DIR 080°
DATE 19 Oct. '71 W'ND spEED i2 k
TIME 1520 SECCHI DISK
DEPTH
( m )
0.0
2.0
4.0
6.0
8.0
10.0
12.0
TEMP
(C )
18.07
18.09
18.09
18.09
18.10
18.12
18.18
SAL
(%o)
2.29
2.36
2.39
2.43
2.46
2.51
2.50
SUSP
SED
(mg/l)
48.96
57.51
62.5?
96.73
160.49
210.05
COMB
ORG
(%)
STATION C & D 1 WEATHER 00
DEPTH 13.4 m WIND DIR. 090°
DATE 19 Oct. '71 WIND SPEED 14 k
TIME 1540 SECCHI DISK
DEPTH
(m )
0.0
2.0
4.0
6.0
8.0
10.0
12.0
TEMP
(C)
18.03
18.03
18.03
18.03
18.04
18.07
18.11
SAL
(%o)
3.19
3.19
3.23
3.24
3.26
3.23
3.28
SUSP
SED
(mg/l )
48.78
54.67
59.66
92.34
120.75
311.13
COMB
ORG
(%)
STATION C & D 2 WEATHER QO
DEPTH 14.0 m WIND DIR 090°
DATE 19 Oct. '71 WIND SPEED 10 k
TIME 1600 SECCHI DISK
DEPTH
(m)
0.0
2.0
4.0
6.0
8.0
10.0
12.0
13-0
TEMP
(C )
17.84
17-89
17.89
17.92
17.92
17.94
17.97
18.06
SAL
(%.> )
3.28
3.38
3.40
3.47
3.45
3.46
3.44
3.45
SUSP
SED
( mg/l)
29.29
35.19
41.97
102.00
157.98
190.24
245.86
500.77
COMB
ORG
(%)
STATION C & D 3 WEATHER 00
DEPTH 12.2 m WIND DIR. 070°
DATE 19 Oct. '71 WIND SPEED 10 k
TIME 1655 SECCHI DISK
DEPTH
( m)
0.0
2.0
4.0
6.0
8.0
10.0
11.0
TEMP
(C )
17.74
17.77
17.80
17.86
17.89
17-92
17.98
SAL
(%o)
3.15
3.13
3.17
3.22
3.31
3.41
3.44
SUSP
SED
(mg/l)
29.53
33.74
32.90
37.36
37.64
35.58
39.25
COMB
ORG
(%)
52
-------
STATION C & D 4 WEATHER 00
DEPTH 13.1 m WIND DIR 090°
DATE 19 Oct. '71 WIND SPEED 99 k
TIME 1710 SECCHI DISK
DEPTH
( m )
0.0
2.0
4.0
6.0
8.0
10.0
12.0
TEMP
(C)
17.68
17.69
17.69
17-71
17.71
17.74
17.77
SAL
l%°)
3.18
3.20
3.21
3.22
3.26
3.27
3.25
SUSP
SED
(mg/l)
29.24
32.24
34. 40
34.62
34.57
35.10
36.11
COMB
ORG
(%)
STATION C & D 5 WEATHER 00
DEPTH 14.0 m WIND DIR 090°
DATE 19 Oct. '71 WIND SPEED 07 k
TIME 1730 SECCHI DISK
DEPTH
( m)
0 .0
2.0
4.0
6.0
8.0
10.0
12.0
TEMP
(C )
17.72
17.78
17. 80
17.81
17.84
17.85
17.85
SAL
(%)
3.40
3.41
3.42
3.46
3.50
3.55
3.53
SUSP
SED
( mq/l)
28.24
27.83
28.86
29.62
31-36
33-55
35.85
COMB
ORG
( %)
STATION C & D 6 WEATHER QQ
DEPTH 11.0 m WIND DIR 060°
DATE 19 Oct. '71 WIND SPEED 09 k
TIME 1745 SECCHI DISK
DEPTH
( m )
0 .0
2.0
4.0
6.0
8.0
10.0
TEMP
(C )
17.75
17.87
17.89
17-90
17.89
17-80
SAL
(%<,)
3-91
4.05
4.06
4 .09
4.14
4.13
SUSP
SED
(mg/ 1)
24.27
24 .11
31.05
64.07
85.68
181.05
COMB
ORG
(%)
STATION C & D 7 WEATHER 00
DEPTH 10.4 m WIND DIR 090°
DATE 19 Oct. '71 WIND SPEED 08 k
TIME 1755 SECCHI DISK
DEPTH
(m )
0.0
2.0
4.0
6.0
8.0
9.0
TEMP
(C)
17.86
17.86
17.91
17.91
17.90
17.98
SAL
(%.)
3.63
3.68
3.92
4.02
4.04
4.01
SUSP
SED
(mg/ 1 )
31-03
37.53
101.96
142.94
380.27
720.58
COMB
ORG
(%)
STATION C & D 8 WEATHER 00
DEPTH H.6 m WIND DIR 090°
DATE 19 Oct. '71 WIND SPEED 12 k
TIME 1810 SECCHI DISK
DEPTH
(m)
0.0
2.0
4.0
6.0
8.0
10.0
TEMP
(C )
17.90
17.93
17.95
17.97
18.00
17.90
SAL
(°/oo )
3.18
3.18
3.17
3.14
3-11
3.14
SUSP
SED
(mg/l)
100.41
138.17
203.05
474.48
535.96
907.70
COMB
ORG
(%)
STATION D R 1 WEATHER
DEPTH WIND DIR
DATE WIND SPEED
TIME SECCH 1 DISK
DEPTH
( m)
TEMP
( C )
SAL
(%°)
SUSP
SED
(mg/l)
COMB
ORG
(%)
53
-------
STATION D R 2 WEATHER 00
DEPTH 12). 6 m WIND DIR 090°
DATE 19 Oct. '71 WIND SPEED 12 k
TIME 1820 SECCHI DISK
DEPTH
( m)
0.0
2.0
4.0
6.0
8.0
10.0
12.0
13-0
TEMP
(C)
18.10
18.13
18.13
18.20
18.22
18.20
18.18
18.14
SAL
1.09
1.12
1.09
1.10
1.11
1.12
1.14
1.15
SUSP
SED
(mg/l)
52.98
62.49
60.54
69.89
91.36
133.40
189.21
362.00
COMB
ORG
STATION DR3 WEATHER
DE PTH WIND DIR
DATE WIND SPEED
TIME SECCHI DISK
DEPTH
( m)
TEMP
1C )
SAL
(%)
SUSP
SED
Img/l)
COMB
ORG
( % )
STATION WEATHER
DEPTH WIND DIR
DATE WIND SPEED
TIME SECCHI DISK
DEPTH
( m )
TEMP
(C 1
SAL
(%o)
SUSP
SED
(mg/ 1)
COMB
ORG
(%)
STATION WEATHER
DEPTH WIND DIR
DATE WIND SPEED
TIME SECCHIDISK
DEPTH
( m )
TEMP
(C)
SAL
l%°)
SUSP
SED
( mg/ M
COMB
ORG
(%)
STATION WEATHER
DEPTH WINDDIR
DATE WIND SPEED
TIME S ECCH 1 DISK
DEPTH
(m)
TEMP
(C )
SAL
(°/oo )
SUSP
SED
(mg/l)
COMB
ORG
(%)
STATION WEATHER
DE PT H WINDDIR
DATE W NO SPEED
TIME SECCH 1 DISK
DEPTH
( m )
TEMP
( C )
SAL
r/ooi
SUSP
SED
( mg/ll
COMB
ORG
( % )
54
-------
STATION 92*4 QQ WEATHER 02
DEPTH 12.2 m WIND DIR 101°
DATE 16 Nov. '71 WIND SPEED 17 k
TIME 1420 SECCHI DISK
DEPTH
( m)
0.0
2.0
4.0
6.0
8.0
10.0
11.5
TEMP
(C)
10.00
9.98
9-96
9-97
9.99
10.57
10.75
SAL
(%o)
0.9^
0.93
0.94
1.10
1.20
2.69
2.96
SUSP
SED
(mg/l)
13-79
12. 31
11.82
15-33
32.58
22.72
273-42
COMB
ORG
(%)
STATION 926 UU WEATHER 02
DEPTH 12.2 m WIND DIR 010°
DATE 16 Nov. '71 WIND SPEED 09 k
TIME 1450 SECCHI DISK
DEPTH
(m)
0.0
2.0
4.0
6.0
8.0
10.0
11.5
TEMP
(C )
9.84
9.82
9.78
9.78
9.78
9.79
9.80
SAL
(%o)
0.80
0.80
0.82
0.82
0.82
0.83
0.83
SUSP
SED
(mg/l)
19.89
16.59
22.17
24.25
104.74
245.81
466. 39
COMB
ORG
( %)
STATION 0 T PT WEATHER Q2
DEPTH 11.9 m WIND DIR 010°
DATE 16 Nov. '71 WIND SPEED 09 k
TIME 1530 SECCHI DISK
DEPTH
( m )
0.0
2.0
4.0
6.0
8.0
10.0
TEMP
( C )
10.38
10.39
10. 36
10.39
10.50
10.55
SAL
(%o)
1.22
1.23
1.23
1.27
1.42
1.42
SUSP
SED
(mg/l)
23.53
25-72
27.39
29.19
36.85
41.90
COMB
ORG
(%)
STATION C & D 1 WEATHER Ql
DEPTH 12.2 m WIND DIR 010°
DATE 16 Nov. '71 WIND SPEED 06 k
TIME 1555 SECCHI DISK
DEPTH
(m )
0.0
2.0
4.0
6.0
8.0
10.0
12.0
TEMP
(C)
10.70
10.71
11.22
11.26
11.28
11.38
11.30
SAL
(%o)
1.39
1.42
2.53
2.61
2.62
2.63
2.63
SUSP
SED
(mg/ 1 )
25.91
25.16
46.36
54.97
59.68
67.50
80.37
COMB
ORG
(%)
STATION C & D 2 WEATHER 01
DEPTH 12.8 m Wl ND DIR
DATE 16 Nov. '71 WIND SPEED
TIME 1615 SECCHI DISK
DEPTH
(m)
0.0
2.0
4.0
6.0
8.0
10.0
12.5
TEMP
(C)
11.62
11.64
11.66
11.68
11.69
11.73
11.74
SAL
(°/oo )
3.44
3.46
3-49
3.49
3-51
3.57
3.60
SUSP
SED
(mg/l)
46.29
44.37
51.03
55.67
52.56
44.93
52.96
COMB
ORG
(%)
STATION C & D 3 WEATHER 01
DEPTH 11.3 WIND DIR
DATE 16 Nov. '71 WIND SPEED
TIME 1635 SECCHI DISK
DEPTH
( m)
0.0
2.0
4.0
6.0
8.0
10.5
TEMP
( C )
11.80
11.81
11.82
11.84
11.85
11.88
SAL
(%)
3.72
3.72
3.75
3.78
3.79
3.84
SUSP
SED
(mg/l)
29 .82
31.69
36.70
46.72
51.72
67-16
COMB
ORG
(%)
55
-------
STATION C & D 4 WEATHER 01
DE PTH 12.2 m WIND DIR
DATE 16 Nov. '71 WIND SPEED 00 k
TIME 1655 SECCHI DISK
DEPTH
( m)
0.0
2.0
4.0
6.0
8.0
10.0
11.5
TEMP
(C)
11.84
11.83
11.83
11.84
11.86
11.87
11.88
SAL
(7oo)
4.22
4.23
4.24
4.24
4.31
4.36
4.39
SUSP
SED
(mg/l)
30.84
31.59
32.00
33.13
35.55
35.60
100.40
COMB
ORG
(%)
STATION C & D 5 WEATHER
DEPTH 12 .8 m WIND DIR
DATE 16 Nov. '71 WIND SPEED
TIME 1710 SECCHI DISK
DEPTH
( m)
0.0
2 .0
4.0
6.0
8.0
10.0
TEMP.
(C )
11.86
11.87
11.88
11.89
11.90
11.90
SAL
(%o)
4.59
4.60
4.62
4.65
4.74
4.77
SUSP
SED
(mg/l)
29.65
31.75
31.04
32.30
37.88
51.23
COMB
ORG
( %)
STATION C & D 6 WEATHER 01
DEPT'H 11.2 m WIND DIR
DATE 16 Nov. '71 WIND SPEED
TIME 1730 SECCHI DISK
DEPTH
( m )
0.0
2.0
4.0
6.0
8.0
10.5
TEMP
(C )
11.87
11.87
11.91
11.92
11.93
11.94
SAL
(%,,)
5.11
5.02
5.24
5.24
5.26
5.26
SUSP
SED
(mg/l)
30.84
27.47
46.59
52.47
71.04
97.25
COMB
ORG
(%)
STATION C & D 7 WEATHER 01
DEPTH 10 . 1 m WIND DIR
DATE 16 Nov. '71 WIND SPEED
TIME 1745 SECCHI DISK
DEPTH
(m )
0 .0
2.0
4.0
6.0
8.0
9.0
TEMP
(C)
11.89
11.90
11.92
11 .91
11.92
11.92
SAL
(%o)
5.23
5.22
5.21
5 .20
5.20
5.21
SUSP
SED
(mg/ 1 )
84.94
79.84
120.56
140 .00
172.68
172.23
COMB
ORG
(%)
STATION C & D 8 WEATHER 00
DEPTH 11.0m WIND DIR
DATE 16 Nov. '71 WIND SPEED 30 k
TIME 1805 SECCHI DISK
DEPTH
(m)
0.0
2.0
4.0
6.0
8.0
9.5
TEMP
(C )
11.96
11.96
11.98
12 .00
12.01
12 .01
SAL
(°/oo )
4.32
4.33
4.35
4.31
4. 34
'1.34
SUSP
SED
(mg/l)
139.34
151.93
153.74
168.31
174.56
178.06
COMB
ORG
(%)
STATION DR1 WEATHER
DEPTH WIND DIR
DATE WIND SPEED
TIME SECCH 1 DISK
DEPTH
( m)
TEMP
( C )
SAL
(%o)
SUSP
SED
(mg/l)
COMB
ORG
(%)
56
-------
STATION D R 2 WEATHER
DE PTH 11.9m WINDDIR
DATE 16 Nov. '71 WIND SPEED
TIME 1820 SECCHI DISK
DEPTH
( m)
0.0
2.0
4.0
6.0
8.0
9.0
TEMP
(C)
12.27
12.23
12.17
12.17
12.17
12.14
SAL
(%o)
1.54
1.80
2.08
2.07
2.20
2.25
SUSP
SED
(mg/l)
47.00
62.96
73-74
83.37
115.15
157.88
COMB
ORG
(%)
STATION D R 3 WEATHER 00
DEPTH 13.4 m WIND DIR
DATE 16 Nov. '71 WIND SPEED 00 k
TIME 1840 SECCHI DISK
DEPTH
( m)
0 .0
2.0
4.0
6.0
8.0
10.0
12.0
13.0
TEMP
(C )
12.58
12.58
12.57
12.61
12.59
12.58
12.57
12.56
SAL
(%o)
0.58
0.58
0.66
0.72
0.76
0.77
0.83
0.95
SUSP
SED
(mg/l)
50.37
51.64
81.80
75.21
90.48
101.53
228.53
COMB
ORG
(%)
STATION WEATHER
DEPTH WIND DIR
DATE WIND SPEED
TIME SECCHI DISK
DEPTH
( m )
TEMP
(C )
SAL
(%o)
SUSP
SED
(mg/l)
COMB
ORG
(%)
STATION WEATHER
DEPTH WIND DIR
DATE WIND SPEED
TIME SECCHI DISK
DEPTH
(m )
TEMP
(C)
SAL
(%)
SUSP
SED
(mg/l )
COMB
ORG
(%)
STATION WEATHER
DEPTH WIND DIR
DATE WIND SPEED
TIME SECCHI DISK
DEPTH
(m)
TEMP
(C )
SAL
(7oo )
SUSP
SED
(mg/l)
COMB
ORG
(%)
STATION WEATHER
DEPTH WIND DIR
DATE WIND SPEED
TIME SECCH 1 DISK
DEPTH
( m)
TEMP
( C )
SAL
(%o)
SUSP
SED
(mg/l)
COMB
ORG
(%)
57
-------
STATION 924 QQ WEATHER Q2
DEPTH 12.5 m WIND DIR 0^5°
DATE 114 Deo. '71 WIND SPEED 08 k
TIME 1230 SECCHI DISK
DEPTH
( m)
0.0
2.0
4.0
6.0
8.0
10.0
11.5
TEMP
(C)
6.06
6.02
6.02
6.03
6.03
6.04
6.04
SAL
(%o)
0.0?
0.05
0.09
0.10
0.11
0.09
0.06
SUSP
SED
(mg/l)
45-59
54.00
60.89
85-27
84.38
103.18
785-94
COMB
ORG
(%)
STATION 926 UU WEATHER 02
DEPTH 8.0 m WIND DIR 045°
DATE 14 Dec. '71 WIND SPEED 08 k
TIME 1300 SECCHI DISK
DEPTH
( m)
0.0
2.0
4.0
6.5
TEMP.
(C )
5.50
5.57
5.63
5.63
SAL
(%)
0.17
0.14
0.15
0.17
SUSP
SED
(mg/l)
44.22
46.37
45-74
54.97
COMB
ORG
(%)
STATION o T FT WEATHER 02
DEPTH 12.8 m WIND DIR °9°°
DATE 14 Dec. '71 WIND SPEED 06 k
TIME 1340 SECCHI DISK
DEPTH
( m )
0.0
2.0
4.0
6.0
8.0
10.0
11.5
TEMP
(C )
5-67
5-72
5-74
5-78
5.78
5.79
5.81
SAL
(%o)
0.54
0.56
0.59
0.56
0.58
0.57
0.54
SUSP
SED
(mg/l)
29-55
33-82
42.51
44.41
24.55
1026.78
COMB
ORG
(%)
STATION C & D 1 WEATHER 02
DEPTH 12.5 m WIND DIR 090°
DATE 14 Dec. '71 WIND SPEED 06 k
TIME 1405 SECCHI DISK
DEPTH
(m )
0.0
2.0
4.0
6.0
8.0
10.0
11.5
TEMP
(C)
5.78
5.79
5.79
5.79
5.81
5. 82
5.86
SAL
(%o)
0.65
0.65
0.64
0.60
0.63
0.63
0.64
SUSP
SED
(mg/l )
28.92
33.04
40. 05
47-33
49 .06
55.88
57-72
COMB
ORG
(%)
STATION C & D 2 WEATHER
DEPTH 13.14 m WIND DIR 090°
DATE i^ Dec. '71 WIND SPEED 07 k
TIME 1430 SECCHI DISK
DEPTH
(m)
0.0
2.0
4.0
6.0
8.0
10.0
12.0
TEMP
(C )
5-92
5-95
5.96
6.00
6.03
6.03
6.03
SAL
(°/oo )
0.65
0.63
0.63
0.65
0.65
0.63
0.63
SUSP
SED
( mg/ 0
37.59
40.08
37-38
43.65
46.11
52.39
48.16
COMB
ORG
1%)
STATION C & D 3 WEATHER
DEPTH 11.6m WIND DIR 090°
DATE il) Dec. '71 W
ND SPEED 08 k
TIME 11450 SECCHI DISK
DEPTH
( m)
0.0
2.0
4.0
6.0
8.0
10.0
TEMP
(C )
5.97
5.97
6.05
6 .03
6.03
6.04
SAL
(%o)
0. 74
0.70
0.67
0.72
0.72
0.72
SUSP
SEO
(mg/l)
55-94
64.60
64.90
121.12
120.91
131.11
COMB
ORG
(%)
58
-------
STATION C & D 4 WEATHER 02
DEPTH 12,5 m WIND DIR 090°
DATE 14 Dec. '71 WIND SPEED QJ k
TIME 1510 SECCHI DISK
DEPTH
( m)
0.0
2.0
4.0
6.0
8.0
10.0
11.0
TEMP
(C)
5.95
6.00
5.95
5.99
5.97
5.99
6.00
SAL
(%o)
0.73
0.73
0.73
0.73
0.71
0.73
0.72
SUSP
SED
(mg/l)
50.19
48.67
56.44
56.68
55.37
67.18
120.41
COMB
ORG
(%)
STATION C & D 5 WEATHER 02
DEPTH 12.8 m WIND DIR ogoo
DATE 14 Dec. '71 WIND SPEED 05 k
TIME 1535 SECCHI DISK
DEPTH
(m)
0.0
2.0
4.0
6.0
8.0
10.0
12.0
TEMP.
(C )
6.71
6.68
6.68
6.71
6. 70
6.72
6.69
SAL
(%o)
0.58
0.55
0.52
0.57
0.56
0.57
0.57
SUSP
SED
(mg/l)
37-24
39.55
^3.73
58.20
67.13
101.92
435.40
COMB.
ORG
(%)
STATION C & D 6 WEATHER 02
DEPTH 10.4 m WIND DIR og0o
DATE 14 Dec. '71 WIND SPEED 05 k
TIME 1550 SECCHI DISK
DEPTH
( m )
0.0
2.0
4.0
6.0
8.0
9.0
TEMP
( C )
6.82
6.79
6.84
6.84'
6.83
6.82
SAL
(%o)
0.56
0.55
0.59
0.56
0.57
0.57
SUSP
SED
(mg/l)
48.74
70.42
64.37
98.46
111.04
107.61
COMB
ORG
(%)
STATION C & D 7 WEATHER 02
DEPTH 9.5 m WIND DIR 090°
DATE 14 Dec. '71 WIND SPEED Og k
TIME 1605 SECCHI DISK
DEPTH
(m )
0.0
2.0
4.0
6.0
8.0
TEMP
(C)
6.83
6.85
6.86
6.86
6.83
SAL
(%<»)
0.56
0.53
0.56
0.56
0. 56
SUSP
SED
(mg/ 1 )
84.64
118.45
127.78
150.88
145.87
COMB
ORG
(%)
STATION C & D 8 WEATHER 02
DEPTH 11.0 m WIND DIR 000°
DATE 14 Dec. '71 WIND SPEED 06 k
TIME J620 SECCHI DISK
DEPTH
(m)
0.0
2.0
4.0
6.0
8.0
10.0
TEMP
(C )
6.90
6.84
6.90
6.89
6.90
6.83
SAL
(°/oo )
0.44
0. 47
0.43
0.47
0.48
0.51
SUSP
SED
(mg/l)
140.55
155.16
155.50
151.65
161.53
167.62
COMB
ORG
(%)
STATION D R 1 WEATHER
DEPTH WIND DIR
DATE WIND SPEED
TIME SECCHI DISK
DEPTH
( m)
TEMP
( C )
SAL
(%o)
SUSP
SED
(mg/l)
COMB
ORG
(%)
59
-------
STATION D R 2 WEATHER Q2
DEPTH 13.7 m WIND DIR 090°
DATE i/j Dec. '71 WIND SPEED 09 k
TIME 1630 SECCHI DISK
DEPTH
( m)
0.0
2.0
4.0
6.0
8.0
10.0
12.0
TEMP
(C )
6.77
6.79
6.82
6.83
6.83
6.84
6.78
SAL
(%o)
0.13
0.13
0.11
0.13
0.11
0.12
0.15
SUSP
SED
(mq/l)
149.00
46.79
68.01
81.92
101.58
166.67
246.13
COMB
ORG
(%)
STATION D R 3 WEATHER Q2
DEPTH 14.6 m WIND DIR
DATE 14 Dec. '71 WIND SPEED
TIME 1705 SECCHI DISK
DEPTH
(m)
0.0
2.0
4.0
6.0
8.0
10.0
12.0
13.0
TEMP
(C )
6.55
6.52
6.48
6.54
6.53
6.50
6.49
6.54
SAL
(%.)
0.08
0.08
0.10
0.10
0. 10
0.11
0. 10
0.11
SUSP
SED
(mg/l)
31-38
54.32
67-45
60.49
86.94
110.59
159.93
182.15
COMB
ORG
( %)
STATION WEATHER
DEPTH WIND DIR
DATE WIND SPEED
TIME SECCHI DISK
DEPTH
( m )
TEMP
(C )
SAL
(%o)
SUSP
SED
(mg/l)
COMB
ORG
(%)
STATION WEATHER
DEPTH WIND DIR
DATE WIND SPEED
TIME SECCHI DISK
DEPTH
(m)
TEMP
(C)
SAL
(%o)
SUSP
SED
(mg/ 1 1
COMB
ORG
(%)
STATION WEATHER
DEPTH WIND DIR
DATE WIND SPEED
TIME SECCHI DISK
DEPTH
(m)
TEMP
(C)
SAL
(%>o )
SUSP
SED
(mg/l)
COMB
ORG
(%)
STATION WEATHER
DEPTH WIND DIR
DATE WIND SPEED
TIME SECCHI DISK
DEPTH
( m)
TEMP
( C )
SAL
(%o)
SUSP
SED
(mg/l)
COMB
ORG
(%)
60
-------
STATION 924 QQ WEATHER 00
DEPTH 12.2 m WIND DIR 020°
DATE 27 Jan. '72 WIND SPEED 10 k
TIME 1245 SECCHI DISK
DEPTH
( m)
0.0
2.0
4.0
6.0
8.0
10.0
11.5
TEMP
(C)
1.21
1.17
1.23
1.18
1.24
1.23
1.35
SAL
(%o)
0.09
0.09
0.09
0.09
0.07
0.08
0.10
SUSP
SED
(mg/l)
34.89
48.41
63.51
COMB
ORG
(%>
STATION 926 OU WEATHER 00
DEPTH 11.6 m WIND DIR 020°
DATE 27 Jan. '72 WIND SPEED 09 k
TIME 1320 SECCHI DISK
DEPTH
( m)
0.0
2.0
4.0
6.0
8.0
10.5
TEMP.
(C )
2.15
2.14
2.19
2.23
2.35
SAL
0.10
0.08
0.08
0.07
0.08
SUSP
SED
(mg/l)
46.15
58.67
64.83
123.31
101.06
COMB
ORG
STATION 0 T FT WEATHER 00
DEPTH 12.8 m WIND DIR 020°
DATE 27 Jan. '72 WIND SPEED 07 k
TIME 1400 SECCHI DISK
DEPTH
( m )
0.0
2.0
4.0
6.0
8.0
10.0
11.5
TEMP
( C )
2.52
2.51
2.52
2.52
2.54
2.69
SAL
(%<»)
0.08
0.07
0.08
0.08
0.07
0.07
SUSP
SED
(mg/ 1)
38.92
43-98
53.88
64.09
63.94
78.32
81.53
COMB
ORG
(%)
STATION C & D 1 WEATHER 00
DEPTH 12.2 m WIND DIR 020°
DATE 27 Jan. '72 WIND SPEED 07 k
TIME 1425 SECCHI DISK
DEPTH
(m )
0.0
2.0
4.0
6.0
8.0
10.5
TEMP
(C)
2.50
2.50
2.49
2.44
2.46
2.54
SAL
(%=)
0 .09
0.10
0.10
0.11
0.11
0.10
SUSP
SED
(mg/ 1 )
34.70
35.97
48.00
51.98
75.44
101.33
COMB
ORG
(%)
STATION C & D 2 WEATHER 01
DEPTH 13.4 m WIND DIR 020°
DATE 27 Jan. '72 WIND SPEED 06 k
Tl M E 1455 SECCH 1 DISK
DEPTH
(m)
0.0
2.0
4.0
6.0
8.0
10 .0
11.5
TEMP
(C )
2.31
2.32
2.31
2.32
2.32
2.35
2.47
SAL
<7.o )
0.12
0.12
0.12
0.12
0.12
0.13
0.12
SUSP
SED
(mg/l)
48.67
45.81
39-82
42.33
49.23
61.34
113.60
COMB
ORG
(%)
STATION C & D 3 WEATHER 01
DEPTH 11.0 m WIND DIR 020°
DATE 27 Jan. '72 W
ND SPEED 06 k
TIME 1510 SECCHI DISK
DEPTH
( m)
0.0
2.0
4.0
6.0
8.0
10.5
TEMP
( C )
2.32
2.32
2.38
2.39
2.39
2.47
SAL
(%)
0.17
0.21
0.26
0. 30
0.30
0.27
SUSP
SED
(mg/l)
38.63
44.54
55.28
61.75
71.06
433-40
COMB
ORG
(%)
61
-------
STATION C & D 4 WEATHER 01
DEPTH 12.2 m WIND DIR 000°
DATE 27 Jan. '72 WIND SPEED 03 k
TIME 1525 SECCHI DISK
DEPTH
( m)
0.0
2.0
4.0
6.0
8.0
10.0
11.0
TEMP
(C)
2.70
2.71
2.70
2. 70
2.69
2.70
2.75
SAL
(%o)
0.41
0.43
0.42
0.4?
0.45
0.44
0.42
SUSP
SED
(mg/l)
65.56
63.00
68.86
69.94
76.80
80.69
110.23
COMB
ORG
(%)
STATION C & D 5 WEATHER Ql
DEPTH 12 8 m WIND DIR 300°
DATE 27 Jan. '72 WIND SPEED 04 k
TIME 1550 SECCHI DISK
DEPTH
(m)
0.0
2.0
4.0
6.0
8.0
10.5
TEMP
(C )
3.05
3.05
3.05
3-05
3.05
3.11
SAL
(%<>)
o. 45
0.45
0.43
0. 45
0.45
0.44
SUSP
SEO
(mg/l)
80 . 89
76.57
66.52
76.46
109 .05
142.77
COMB
ORG
( %)
STATION C & D 6 WEATHER 01
DEPTH io.4 m wl N D DIR 350°
DATE 27 Jan. '72 WIND SPEED 04 k
TIME 1600 SECCHI DISK
DEPTH
( m )
0.0
2.0
4.0
6.0
8.0
10.0
TEMP
1C )
3.10
3.12
3.12
3-12
3.12
3.15
SAL
(%o)
0.46
0.46.
0.47
0.48
0.4?
0.43
SUSP
SED
(mg/l)
67.26
67.62
75-90
90.12
105.06
152.22
COMB
ORG
(%)
STATION C & D 7 WEATHER 01
DEPTH 10.0m WIND OIR
DATE 27 Jan. '72 WIND SPEED 00 k
TIME 1620 SECCHI DISK
DEPTH
(m )
0.0
2.0
4.0
6.0
8.0
9.0
TEMP
(C)
3.09
3.10
3.10
3.10
3.11
3.15
SAL
(%)
0.51
0.48
0.4?
0.47
0.48
0.47
SUSP
SED
(mg/ 1 )
144.68
152.72
202 .19
176.41
194.25
264.03
COMB
ORG
(%)
STATION C & D 8 WEATHER 01
DEPTH 11.0 m WIND DIR
DATE 27 Jan. '72 WIND SPEED 00 k
TIME 1630 SECCHI DISK
DEPTH
(m)
0.0
2.0
4.0
6.0
8.0
9-0
TEMP
(C)
3.09
3-11
3.10
3.10
3.12
3.16
SAL
(°/.o )
0.45
0.44
0.47
0.44
0.46
0.46
SUSP
SED
(mg/l)
144.03
198.91
222.11
273-89
266.78
255.59
COMB
ORG
(%)
STATION D R 1 WEATHER
DEPTH WIND DIR
DATE WIND SPEED
TIME SECCH 1 DISK
DEPTH
( m)
TEMP
( C )
SAL
(%o)
SUSP
SED
(mg/l)
COMB
ORG
(%)
62
-------
STATION D R 2 WEATHER Ql
DE PTH 14.0 m WIND DIR
DATE 27 Jan. '72 WIND SPEED 00 k
TIME 1650 SECCHI DISK
DEPTH
( m)
0.0
2.0
4,0
6.0
8.0
10.0
12.5
TEMP.
(C)
3.54
3.57
3.57
3.57
3.57
3-57
j.6l
SAL
(%o)
0.21
0.21
0.19
0.23
0.20
0.21
0.21
SUSP
SED
(mg/l)
67.16
96.54
112.57
127.72
146.80
157-51
177.71
COMB
ORG
(%)
STATION D R 3 WEATHER 01
DEPTH H(. 9 m WIND DIR.
DATE 27 Jan. '72 WIND SPEED 00 k
TIME 1700 SECCHI DISK
DEPTH
(m)
0.0
2.0
4.0
6.0
8.0
10.0
12.0
13.0
TEMP.
(C )
4.11
1.H7
4.50
4.50
4.53
4.57
4.58
4.70
SAL
(%.}
0.16
0.16
0.14
0.13
0.12
0.15
0.15
0.12
SUSP
SED
(mg/l)
42.66
55.00
77.41
78.74
94.95
145.83
173-14
244.43
COMB.
ORG
(%)
STATION WEATHER
DEPTH. WIND DIR.
DATE WIND SPEED
TIME SECCHI DISK
DEPTH
( m )
TEMP
(C )
SAL
(%.)
SUSP
SED
(mg/l)
COMB
ORG
(%)
STATION WEATHER
DEPTH WIND DIR
DATE WIND SPEED
TIME SECCHI DISK
DEPTH
(m )
TEMP
(C)
SAL
(%.)
SUSP
SED
(mg/l )
COMB
ORG
(%)
STATION WEATHER
DEPTH WIND DIR
DATE WIND SPEED
TIME SECCHI DISK
DEPTH
(m)
TEMP
(C )
SAL
(7.. )
SUSP
SED
(mg/l)
COMB
ORG
(7«)
STATION WEATHER
DEPTH WIND DIR
DATE WIND SPEED
TIME SECCHI DISK
DEPTH
( m)
TEMP
( C )
SAL
(7.o)
SUSP
SED
(mg/l)
COMB
ORG
(%)
63
-------
STATION 924 OQ WEATHER 01
DEPTH 10.1m WIND DIR 210°
DATE 28 Feb. '72 WIND SPEED 0? k
TIME 1120 SECCHI DISK
DEPTH
( m)
0.0
2.0
1.0
6.0
8.0
10.9
TEMP
(C)
2.11
2.11
2.11
2.13
2. 11
2.20
SAL
(7oo)
0.23
0.21
0.23
0.27
0.27
0.30
SUSP
SED
(mg/l)
11.68
17.32
13.78
51.01
67.18
131.18
COMB
ORG
(%)
STATION 926 UU WEATHER 01
DEPTH 12.5 m WIND DIR 210°
DATE 28 Feb. '72 WIND SPEED Q7 k
TIME 1150 SECCHI DISK
DEPTH
( m)
0.0
2.0
1.0
6.0
8.0
9.6
TEMP
(C )
1.91
1.76
1.76
1. 78
1.81
1.81
SAL
(%o)
0.39
0.39
0.38
0.10
0.13
0.15
SUSP
SED
(mg/l)
16.oo
69.11
80 .17
79.27
92.61
91-36
COMB
ORG
( %)
STATION 0 T FT WEATHER 01
DEPTH 12.8 m WIND DIR 210°
DATE 28 Feb. '72 WIND SPEED 07 k
TIME 1530 SECCHI DISK
DEPTH
( m )
0.0
2.0
1.0
6.0
8.0
10.3
TEMP
(C )
2.05
2.05
2.02
2.03
2.03
2.07
SAL
(%o)
1.09
1.08
1.10
1.11
1.15
1.13
SUSP
SED
(mg/l)
39.50
11.50
19-89
60.76
390.82
501.25
COMB
ORG
(%)
STATION C & D 1 WEATHER 01
DEPTH 9-lm WINDDIR
DATE 28 Feb. '72 WIND SPEED 00 k
TIME 1600 SECCHI DISK
DEPTH
(m )
0.0
2.0
1.0
6.0
8,0
9.9
TEMP
(C)
2.33
2.23
2.15
2.08
2. 03
2.01
SAL
(%)
1.21
1.21
1.21
1.23
1.27
1.30
SUSP
SED
(rng/ 1 )
31.11
32.80
33.56
36 . 32
12.52
16.02
COMB
ORG
(%)
STATION C & D 2 WEATHER 01
DEPTH 12.8m WIND DIR
DATE 28 Feb. '72 WIND SPEED 00 k
TIME 1620 SECCHI DISK
DEPTH
(m)
0.0
2.0
1.0
6.0
8.0
10.0
11.3
TEMP
(C)
2.18
2.10
2.09
2.09
2.09
2.11
2.15
SAL
(%o )
1.34
1.38
1.37
1.31
1.37
1.10
1.11
SUSP
SED
(mg/l)
27.12
32.20
36.11
37.18
10.80
15.36
57.08
COMB
ORG
(%)
STATION 'C & D 3 WEATHER 01
DEPTH 12.8 m WINDDIR
DATE 28 Feb. '72 WIND SPEED 00 k
TIME 1610 SECCHI DISK
DEPTH
( m )
0.0
2 .0
1.0
6.0
8.0
10.0
TEMP
( C )
2.11
2.10
2.09
2.09
2.10
2.13
SAL
(%<,)
1.17
1.17
1.15
1.17
1.18
1.19
SUSP
SED.
(mg/l)
31.68
38.01
39.11
11.10
57.28
113.72
COMB
ORG
(%)
64
-------
STATION C & D It WEATHER 01
DE PTH 12. 8 m WIND DIR
DATE 28 Feb. '72 WIND SPEED 00 k
TIME 1650 SECCHI DISK
DEPTH
( m)
0.0
2.0
4.0
6.0
8.0
10.5
TEMP.
(C)
2.18
2.17
2.16
2.13
2.12
2.14
SAL
(7oe)
1.59
1.59
1.60
1.61
1.61
1.61
SUSP.
SED
(mg/l)
39.29
39.11
43-30
63.08
76.70
97.71
COMB
ORG
(%)
STATION C & D 5 WEATHER 01
DEPTH 13.1 n WIND DIR
DATE 28 Feb. '72 WIND SPEED QO k
TIME 1708 SECCHI DISK
DEPTH
(m)
0.0
2.0
4.0
6.0
8.0
10.0
12.0
TEMP.
(C )
2.26
2.24
2.22
2.20
2.19
2.20
2.24
SAL
(%o)
1.96
1.93
1.92
1.95
2.03
2.09
2.11
SUSP
SED
(mq/l)
47.72
43.41
42.73
41.48
77-61
128.84
318.75
COMB.
ORG
(%)
STATION C & D 6 WEATHER 01
DEPTH il.o m WIND DIR
DATE 28 Feb. '72 WIND SPEED 00 k
TIME 1730 SECCHI DISK
DEPTH
( m )
0.0
2.0
4.0
6.0
8.0
10.6
TEMP
(C )
2.28
2.26
2.26
2.28
2.33
2.39
SAL
(%ot
2.21
2.29
2.40
2.40
2.49
2.52
SUSP
SED
(mg/l)
38.13
48.08
121.77
115-18
111.81
163.77
COMB
ORG
(%)
STATION C & D 7 WEATHER 01
DEPTH 9.8m WIND DIR
DATE 28 Feb. '72 WIND SPEED 00 k
TIME i7n^ SECCHI DISK
DEPTH
(m)
0.0
2.0
4.0
6.0
8.5
TEMP
(C)
2.65
2.60
2.62
2.59
2.63
SAL
(%.)
3-01
3-03
3.08
3.10
3.12
SUSP
SED
(mg/l )
116.87
159-36
248.41
309.64
406.04
COMB
ORG
(%)
STATION C & D 8 WEATHER 01
DEPTH 11.0 m WIND DIR
DATE 28 Feb. '72 WIND SPEED 00 k
TIME 1755 SECCHI DISK
DEPTH
(m)
0.0
2.0
4.0
6.0
8.0
10.0
TEMP
(C)
2.64
2.65
2.64
2.65
2.64
2.65
SAL
(7.. )
3-31
3-31
3.31
3.31
3.29
3.28
SUSP
SED
(mg/l)
142.07
140.85
150.45
159-11
168.14
224.85
COMB
ORG
(%)
STATION D R 1 WEATHER
DEPTH WIND DIR
DATE WIND SPEED
TIME SECCHI DISK
DEPTH
( m)
TEMP
( C )
SAL
(%.)
SUSP
SED
(mg/l)
COMB
ORG
(7.)
65
-------
STATION D R 2 WEATHER 01
DE PTH 14.6 m WIND OIR
DATE 28 Feb. '72 WIND SPEED 00 K
TIME 1810 SECCHI DISK
DEPTH
( m )
0.0
2.0
4 .0
6.0
8.0
10 .0
12.0
TEMP
(C )
3.01
3.03
3.04
2.9'1
3.03
3.03
3.06
SAL
(%)
1.01
1.05
1.06
1.07
1.04
1.13
1.12
SUSP
SED
(mg/l)
94 . 2')
108.40
108.52
120.76
148.^7
104.77
441.50
COMB
ORG
(%)
STATION I. H .-i WE ATHE R 01
DEPTH ]_3.'l m WIND DIR
DATE 2° pob . '72 WIND SPEED 00 K
TIME l84r, SECCHI DISK
DEPTH
( m)
0 . 0
2 . 0
4.0
6.0
8.0
10.0
12.0
14 .0
TEMP
(C )
3.51
3 . '4 4
3.46
3.M
3.48
3.48
3.4-
3.5?
SAL
(%«)
0 . ? 4
0.24
0.24
0.24
0.2:
0 . 2?
G 22
0.24
SUSP
SED
(mg/l)
134.86
137.67
132.31
128.42
142.10
14 :r. 3?
145.34
154.01
COMB
ORG
(%)
STATION WEATHER
DEPTH WIND DIR
DATE WIND SPEED
TIME SECCHI DISK
DEPTH
( m )
TEMP
(C )
SAL
(%»)
SUSP
SED
(mg/l)
COMB
ORG
(%)
STATION WEATHER
DEPTH WIND DIR
DATE WIND SPEED
TIME SECCH! DISK
DEPTH
(m )
TEMP
(C)
SAL
(%°)
SUSP
SED
(mg/l )
COMB
ORG
(%)
STATION WEATHER
DEPTH WIND DIR
DATE WIND SPEED
TIME SECCH 1 DISK
DEPTH
(m)
TEMP
(C )
SAL
(7oo )
SUSP
SED
(mg/l)
COMB
ORG
(%)
STATION WEATHER
DEPTH WIND DIR
DATE WIND SPEED
TIME SECCHI DISK
DEPTH
( m)
TEMP
( C )
SAL
(%o)
SUSP
SED
(mg/l)
COMB
ORG
(%)
66
-------
STATION 924 QQ WEATHER 06
DEPTH 11.0 m WIND DIR 140°
DATE 14 Feb. '73 WIND SPEED 06 k
TIME 1335 SECCHI DISK
DEPTH
( m)
0.0
2.0
4.0
6.0
8.0
10.0
TEMP
(C)
1.21
1.20
1.18
1.20
1.23
1.47
SAL
(%o)
0.20
0.31
0.33
0.43
0.60
1.5^
SUSP
SEO
(mg/l)
36.21
40.09
46.42
47.47
61.76
57.63
COMB
ORG
(%)
STATION 926 UU WEATHER 06
DEPTH 11.6 m WIND DIR 140°
DATE 14 Feb. '73 WIND SPEED 05 k
TIME 1405 SECCHI DISK
DEPTH
(m)
0.0
2.0
4.0
6.0
8.0
10.0
TEMP
(C )
1.19
1.17
1.21
1.23
1.27
1.27
SAL
(%o)
0.31
0.31
0.49
0.51
0.60
0.81
SUSP
SED
(mg/l)
COMB
ORG
( %)
STATION 0 T PT WEATHER
DEPTH 13.5 m WIND DIR 090°
DATE 14 Feb. '73 WIND SPEED 05 k
TIME SECCHI DISK
DEPTH
( m )
0.0
2.0
4.0
6.0
8.0
10 .0
12.0
13.5
TEMP
(C )
1.64
1.62
1.62
1.63
1.61
1.62
1.64
1.67
SAL
(%o)
0.79
o .70
0.54
0.49
0.46
0.40
0.50
0.50
SUSP
SED
(mg/l)
63.07
68.15
68.53
74.47
83.06
84.57
COMB
ORG
(%)
STATION C & D 1 WEATHER 06
DEPTH 12.2 m WIND DIR 050°
DATE 14 Feb. '73 WIND SPEED 05 k
TIME SECCHI DISK
DEPTH
(m )
0.0
2.0
4.0
6.0
8.0
10 .0
12.0
TEMP
(C)
1.78
1.77
1.79
1.82
1.85
1.85
1.86
SAL
(%)
1.04
1.01
1.07
1.06
1.03
1.01
o .90
SUSP
SED
(mg/ 1 )
55.92
59-98
60 .09
69 .94
87.14
94.80
114 .56
COMB
ORG
(%)
STATION C & D 2 WEATHER 06
DEPTH 12.1 m WIND DIR 090°
DATE 14 Feb. '73 WIND SPEED 09 k
TIME 1530 SECCHI DISK
DEPTH
(m)
0.0
2.0
4.0
6.0
8.0
10 .0
12.0
TEMP
(C )
1.86
1.87
1.87
1.87
1.87
1.89
1.88
SAL
(%, )
0.76
0.99
0.98
0.99
0.85
0.89
0.87
SUSP
SED
(mg/l)
103.71
38.13
106.26
104.32
133.56
130.58
138.34
COMB
ORG
(%)
STATION C & U 3 WEATHER 06
DEPTH 13.0 m WIND DIR 090°
DATE 14 Feb. '73 WIND SPEED 09 k
TIME 1550 SECCHI DISK
DEPTH
( m)
0.0
2.0
4.0
6.0
8.0
10.0
12.0
13.0
TEMP
( C )
1.98
1.87
1.88
1.88
1.88
1.89
1.84
1.86
SAL
(%=)
0.69
0.67
0.69
0.69
0.67
0.71
0.73
0.69
SUSP
SED
(mg/l)
77.43
53-24
117-21
164.77
191-20
253.52
1135.35
COMB
ORG
(%)
67
-------
STATION C & D 4 WEATHER 06
DEPTH 12.2 m WIND DIP 090°
DATE 111 Feb. '73 WIND SPEED 09 k
TIME 1605 SECCHI DISK
DEPTH
( m)
0.0
2.0
4.0
6.0
8.0
10.0
12.0
TEMP
(C)
1.88
1.89
1.90
1.91
1.91
1.95
1.93
SAL
(%.)
0.61
0.66
0.58
0.60
0.64
0.6?
0.69
SUSP
SED
(mg/l)
148.69
157.51
169.66
303.80
188.26
2245.98
COMB
ORG
(%)
STATION C & D 5 WEATHER 06
DEPTH 10.8 m WIND DIR 090°
DATE 14 Feb. '73 WIND SPEED 08 k
TIME 1625 SECCHI DISK
DEPTH
( m)
0.0
2.0
4.0
6.0
8.0
10 .0
TEMP
(C )
2.03
2.02
2.04
2.04
2.05
2.05
SAL
(%o)
0.76
0.75
0.87
0.82
0.86
0.89
SUSP
SED
(mg/l)
137-81
174.. 73
201, 43
203- 83
212 .27
204.65
COMB
ORG
( % )
STATION C & D 6 WEATHER 06
DEPTH 11.8 m WIND DIR 090°
DATE 14 Feb. '73 WIND SPEED 07 k
TIME 1639 SECCHI DISK
DEPTH
( m )
0.0
2.0
4.0
6.0
8.0
10.0
11.5
TEMP
(C )
2.08
2.08
2.10
2.09
2.11
2.12
2.12
SAL
(%o)
o .90
0.91
0.97
0.94
1.03
1.05
0.97
SUSP
SED
(mg/l)
238.38
214.17
343.34
298.30
455.81
471.43
588.51
COMB
ORG
(%)
STATION C & D 7 WEATHER 06
DEPTH 11.8 m WIND DIR 090°
DATE 14 Feb. '73 WIND SPEED 05 k
TIME 1700 SECCH 1 DISK
DEPTH
(m )
0.0
2 .0
4.0
6.0-
8.0
10.0
H.5
TEMP
(C)
2.16
2.18
2.18
2.19
2.22
2.23
2.25
SAL
(%)
1.62
1.66
1.72
1.79
1.08
2.08
2.14
SUSP
SED
(mg/ 1 )
182.04
234.37
229.12
239.01
252.21
251.25
546.65
COMB
ORG
(%)
STATION C & D 8 WEATHER 06
DEPTH 12.2 m WIND DIR 090°
DATE ii( Feb. '73 WIND SPEED 05 k
TIME 1720 SECCHI DISK
DEPTH
(m)
TEMP
(C)
SAL
(°/oo )
SUSP
SED
(mg/l)
COMB
ORG
(%)
STATION D R 1 WEATHER
DEPTH WIND DIR
DATE WIND SPEED
TIME SECCHI DISK
DEPTH
( m)
TEMP
(C )
SAL
(%<>)
SUSP
SED
(mg/l)
COMB
ORG
(%)
68
-------
STATION D R 2 WEATHER 06
DEPTH 12.7 m WIND DIR 090°
DATE 14 Feb. '73 WIND SPEED 10 k
TIME 1733 SECCHI DISK
DEPTH
( m)
0.0
2.0
4.0
6.0
8.0
10.0
12.5
TEMP.
(C)
2.65
2.66
2.61
2.55
2.59
2.52
2.55
SAL
(%.)
0.43
0.52
0.92
1.34
1.14
1.70
1.32
SUSP.
SED
(mg/l)
81.15
91.63
128.09
176.32
185.53
248.96
289-52
COMB
ORG
(%)
STATION D R 3 WEATHER
DEPTH WIND DIR
DATE WIND SPEED
TIME SECCHI DISK
DEPTH
(m)
TEMP.
(C )
SAL
(%o)
SUSP
SED
(mg/l)
COMB
ORG
( %)
STATION WEATHER
DEPTH WIND DIR
DATE WIND SPEED
TIME SECCHI DISK
DEPTH
( m )
TEMP
( C )
SAL
(%.)
SUSP
SED
(mg/l)
COMB
ORG
(%)
STATION WEATHER
DEPTH WIND DIR
DATE WIND SPEED
TIME SECCHI DISK
DEPTH
(m )
TEMP
(C)
SAL
(%o)
SUSP
SED
(mg/l )
COMB
ORG
(%)
STATION WEATHER
DEPTH WIND DIR
DATE WIND SPEED
TIME SECCHI DISK
DEPTH
(m)
TEMP
(C )
SAL
(7oo )
SUSP
SED
(mg/l)
COMB
ORG
(%)
STATION WEATHER
DEPTH WIND DIR
DATE WIND SPEED
TIME SECCHI DISK
DEPTH
( m)
TEMP
(C )
SAL
(%.)
SUSP
SED
(mg/l)
COMB
ORG
(%)
69
-------
STATION 924 QQ WEATHER
DE PTH 10 m WIND DIR
DATE 5 Oct. '76 WIND SPEED
TIME 1345 SECCHI DISK 11 cm
DEPTH
( m)
0.0
2.0
4.0
6.0
8.0
9.0
TEMP
(C)
18.10
17.83
17.96
18.05
18.12
18.17
SAL
2.11
2.54
4.29
4.70
5.01
5.35
SUSP
SED
(mg/l)
5.07
4.96
5.18
15 .24
21.66
38.40
COMB
ORG
STATION 926 UU WEATHER
DEPTH 10. 5 m WIND DIR
DATE 5 Oct. '76 WIND SPEED
TIME 1415 SECCHI DISK 9 cm
DEPTH
( m)
0.0
2 .0
4.0
6.0
8.0
9.0
10.0
TEMP
(C )
18.17
18.19
18.16
18.16
18.16
18.14
SAL
(%o)
4.87
5.66
6.16
6.40
6.53
6.54
SUSP
SED
(mg/l)
6.91
19.81
32.02
53.86
50.35
52.66
COMB
ORG
( % )
STATION 0 T FT WEATHER
DEPTH 12.5 m WIND DIR
DATE 5 Oct. '76 WIND SPEED
TIME 1450 SECCHI DISK 60 cm
DEPTH
( m )
0.0
2.0
4.0
6.0
8.0
10.0
12'. 0
TEMP
(C )
18.16
18.16
18.16
18.17
18.18
18.19
18.19
SAL
<%o)
6.91
7.23
7.31
7.33
7.37
7.41
7.48
SUSP
SED
(mg/l)
20 .69
24 .06
27-35
35.21
32.90
35-94
48.61
COMB
ORG
(%)
STATION C & D 1 WEATHER
DEPTH 12 .2 m WIND DIR
DATE 5 Oct. '76 WIND SPEED
TIME 1510 SECCHI DISK 60 cm
DEPTH
(m)
0.0
2.0
4.0
6.0
8.0
10.0
12.0
TEMP
(C)
18.33
18.32
18.30
18.29
18.28
18.27
18.25
SAL
(%o)
7.65
7.73
7.76
7.81
7.82
7.82
7.82
SUSP
SED
(rng/ 1 )
22.87
26.19
26.80
37.30
37.95
40.71
65.51
COMB
ORG
(%)
STATION C & D 2 WEATHER
DEPTH 12.2 m WIND DIR
DATE 5 Oct. '76 WIND SPEED
TIME 1530 SECCHI DISK 60 cm
DEPTH
(m)
0.0
2.0
4.0
6.0
8.0
10.0
12.0
TEMP
(C)
18.38
18.37
18.37
18.36
18.35
18.34
SAL
(%, )
7.57
7.58
7.58
7.58
7.59
7.59
SUSP
SED
(mg/l)
29-37
28.89
35.23
39-89
38.45
86.14
158.69
COMB
ORG
(%)
STATION C & D 3 WEATHER
DEPTH 10 .2 m WIND DIR
DATE 5 Oct. '76 WIND SPEED
TIME 1650 SECCHI DISK
DEPTH
( m)
0.0
2.0
4.0
6.0
8.0
10.0
TEMP
(C )
18.39
18.38
18.38
18.38
18.36
18.33
SAL
(%)
7.65
7.65
7.66
7.68
7.70
7.71
SUSP
SED
(mg/l)
23.02
25.57
25.09
27.53
42.22
105.72
COMB
ORG
(%)
70
-------
UNITED STATES ENVIRONMENTAL PROTECTION AGENCY
REGION III
6TH AND WALNUT STREETS
PHILADELPHIA, PENNSYLVANIA 19106 , fi .-,,
Mr. Noel Beegle
Corp of Engineers
Baltimore District
Chesapeake Bay Study Branch
P. 0. Box 1715
Baltimore, Maryland
Dear Mr. Beegle:
Per our telephone conversation, I have placed you on our library
mailing list. You will receive notification when additional reports
are received by our office.
Thomas Nugent has informed me that you are interested in obtaining,
EPA 903/9-78-013, "Suspended Sediment in the Chesapeake and Delaware
Canal," so I have also enclosed a copy of that report.
If you should require additional information please feel free to contact
me.
Thank you for your interest in the Chesapeake Bay Program.
Sincerely,
' ',"'
J
Pauline Steinbacher
Environmental Protection Aide
Enclosure
-------
-------
STATION C & D 4 WEATHER
DEPTH 12.2 m WIND DIR
DATE 5 Oct. '76 WIND SPEED
TIME 1605 SECCHI DISK 65 era
DEPTH
( m)
0.0
2.0
4.0
6.0
8.0
10.0
12.0
TEMP
(C )
18.33
18.33
18.32
18.30
18.27
18.25
18.21
SAL
!%«,)
7.99
7.99
7.99
8.00
8.00
8.01
8.02
SUSP
SED
(mg/l)
20.07
23.33
24.04
46.55
78.61
128.83
396.49
COMB
ORG
(%)
STATION C & D 5 WEATHER
DEPTH 12.2 m WIND DIP
DATE 5 Oct. '76 WIND SPEED
TIME 1620 SECCHI DISK 60 cm
DEPTH
(m)
0.0
2.0
4.0
6.0
8.0
10.0
12.0
TEMP.
(C )
18.19
18.20
18.19
18.17
18.16
18.14
18.03
SAL
(%o)
7.85
7.87
7.87
7.86
7.87
7.87
7.89
SUSP
SED
(mg/l)
25.89
43.49
38.47
74.38
94.57
176.25
273.22
COMB
ORG
l_ (%)
STATION c & D 6 WEATHER
DEPTH 10.3 m WIND DIR
DATE 5 Oct. '76 WIND SPEED
TIME 1635 SECCHI DISK
DEPTH
( m )
0.0
;?.o
4. 0
6.0
3.0
10.0
TEMP
(C I
18.15
18.15
18.14
18.13
18.11
18.08
SAL
(%o)
7.97
7.96
7.96
7.97
7.98
8.00
SUSP
SED
(mg/l)
19.58
129.78
120.81
111.49
148.65
264.18
COMB
ORG
(%)
STATION C & D 7 WEATHER
DEPTH 8.2 m WIND DIR
DATE 5 Oct. '76 WIND SPEED
TIME 1660 SECCHI DISK 45 cm
DEPTH
(m)
0.0
2.0
4.0
6.0
8.0
TEMP
1C)
18.18
18.18
18.17
18.16
18.15
SAL
8.43
8.43
8.43
8.42
8.42
SUSP
SED
(mg/ 1 )
53.37
76.30
96.70
135.04
COMB
ORG
STATION C & D 8 WEATHER
DEPTH 10 . 1 m WIND DIR
DATE 5 Oct. '76 WIND SPEED
TIME 1750 SECCHI DISK
DEPTH
(m)
0.0
2.0
4.0
6.0
8.0
10.0
TEMP
(C )
18.28
18.24
18.22
18.19
18.15
18.11
SAL
(%o )
7.88
7.94
8.04
8.25
8.29
8.32
SUSP
SED
(mg/l)
34.88
49-93
47.07
163.84
220.89
COMB
ORG
(%)
STATION D R 1 WEATHER
DEPTH WIND DIR
DATE WIND SPEED
TIME SECCHI DISK
DEPTH
( m )
TEMP
( C )
SAL
(7oo)
SUSP
SED
(mg/l)
COMB
ORG
(%)
71
-------
STATION D R 2 WEATHER
DE PTH 12 .1 m WIND DIR
DATE 5 Oct. '76 WIND SPEED
TIME 1715 SECCHI DISK 45cm
DEPTH
( m }
0.0
2.0
4.0
6.0
8.0
10.0
12.0
TEMP
(C)
18.43
18.41
18.39
18.39
18.42
18.65
18.10
SAL
(%o)
3-92
4.85
5.30
5.72
5.85
6.19
7.48
SUSP
SEO
(mg/l)
30.68
40.78
45.60
71.26
75.55
109.43
342.35
COMB
ORG
(%)
STATION D R 3 WEATHER
DEPTH WIND DIR
DATE WIND SPEED
TIME SECCHI DISK
DEPTH
(m)
TEMP
(C )
SAL
(%o)
SUSP
SED
L (mg/l)
COMB
ORG
(%)
STATION WEATHER
DEPTH WIND DIR
DATE WIND SPEED
TIME SECCHI DISK
DEPTH
( m )
TEMP
(C )
SAL
(%o)
SUSP
SED
(mg/l)
COMB
ORG
(%)
STATION WEATHER
DEPTH WIND DIR
DATE WIND SPEED
TIME SECCHI DISK
DEPTH
(m )
TEMP
(C)
SAL
(%,>)
SUSP
SED
(mg/l )
COMB
ORG
(%!
STATION WEATHER
DEPTH WIND DIR
DATE WIND SPEED
TIME SECCHI DISK
DEPTH
(m)
TEMP
(C)
SAL
(%,»)
SUSP
SED
( mg/l)
COMB
ORG
(%)
STATION WEATHER
DEPTH WIND DIR
DATE WIND SPEED
TIME SECCHI DISK
DEPTH
( m)
TEMP
( C )
SAL
(%o)
SUSP
SED
(mg/l)
COMB
ORG
(%)
72
------- |