U.S. ENVIRONMENTAL PROTECTION AGENCY
NATIONAL EUTROPHICATION SURVEY
WORKING PAPER SERIES
REPORT
ON
UNPLEASANT
WRICOPA AND YAVAPAI COUNTIES
ARIZONA
EPA REGION IX
WORKING PAPER No, 732
CORVALLIS ENVIRONMENTAL RESEARCH LABORATORY - CORVALLIS, OREGON
and
ENVIRONMENTAL MONITORING & SUPPORT LABORATORY - LAS VEGAS, NEVADA
-------
REPORT
ON
PLEASANT
IWICOPA AND YAVAPAI COUNTIES
ARIZONA
EPA REGION IX
WORKING PAPER No, 732
WITH THE COOPERATION OF THE
ARIZONA STATE DEPARTMENT OF HEALTH
AND THE
ARIZONA NATIONAL GUARD
AUGUST, 1977
-------
REPORT ON LAKE PLEASANT
MARICOPA AND YAVAPAI COUNTIES, ARIZONA
EPA REGION IX
by
National Eutrophication Survey
Water and Land Quality Branch
Monitoring Operations Division
Environmental Monitoring & Support Laboratory
Las Vegas, Nevada
and
Special Studies Branch
Corvallis Environmental Research Laboratory
Corvallis, Oregon
Working Paper No. 732
OFFICE OF RESEARCH AND DEVELOPMENT
U.S. ENVIRONMENTAL PROTECTION AGENCY
August 1977
-------
1
CONTENTS
Page
Foreword i i
List of Arizona Study Lakes iv
Lake and Drainage Area Map ' v
Sections
I. Introduction 1
II. Conclusions 1
III. Lake Characteristics 3
IV. Lake Water Quality Summary 4
V. Literature Reviewed 10
VI. Appendices 11
-------
ii
FOREWORD
The National Eutrophication Survey was initiated 1n 1972 1n
response to an Administration commitment to Investigate the nation-
wide threat of accelerated eutrophication to freshwater lakes and
reservoirs.
OBJECTIVES
The Survey was designed to develop, in conjunction with state
environmental agencies, information on nutrient sources, concen-
trations, and impact on selected freshwater lakes as a basis for
formulating comprehensive and coordinated national, regional, and
state management practices relating to point source discharge
reduction and nonpoint source pollution abatement in lake water-
sheds.
ANALYTIC APPROACH
The mathematical and statistical procedures selected for the
Survey's eutrophication analysis are based on related concepts
that:
a. A generalized representation or model relating
sources, concentrations, and impacts can be
constructed.
b. By applying measurements of relevant parameters
associated with lake degradation, the generalized
model can be transformed into an operational
representation of a lake, its drainage basin, and
related nutrients.
c. With such a transformation, an assessment of the
potential for eutrophication control can be made.
LAKE ANALYSIS
In this report, the first stage of evaluation of lake and
watershed data collected from the study lake and its drainage
basin is documented. The report is formatted to provide state
environmental agencies with specific information for basin
planning [§303(e)], water quality criteria/standards review
[§303(c}], clean lakes [§314(a,b}J, and water quality monitoring
[§106 and §305(b)] activities mandated by the Federal Water
Pollution Control Act Amendments of 1972.
-------
111
Beyond the single lake analysis, broader based correlations
between nutrient concentrations (and loading) and trophic condition
are being made to advance the rationale and data base for refine-
ment of nutrient water quality criteria for the Nation's freshwater
lakes. Likewise, multlvarlate evaluations for the relationships
between land use, nutrient export, and trophic condition, by lake
class or use, are being developed to assist 1n the formulation of
planning guidelines and policies by the U.S. Environmental Protection
Agency and to augment plans implementation by the states.
ACKNOWLEDGMENTS
The staff of the National Eutrophication Survey (Office of
Research and Development, U.S. Environmental Protection Agency)
expresses sincere appreciation to the Arizona State Department
of Health for professional involvement, to the Arizona National
Guard for conducting the tributary sampling phase of the Survey,
and to those Arizona wastewater treatment plant operators who
provided effluent samples and flow data.
The staffs of the Bureau of Water Quality Control, Environ-
mental Health Services, Arizona State Department of Health, and
the Arizona Game and Fish Department, provided invaluable lake
documentation and counsel during the Survey, reviewed the pre-
liminary reports and provided critiques most useful In the
preparation of this Working Paper Series.
Major General John G. Smith, the Adjutant General of Arizona,
and Project Officer Colonel Richard A. Col son, who directed the
volunteer efforts of the Arizona National Guardsmen, are also
gratefully acknowledged for their assistance to the Survey.
-------
IV
NATIONAL EUTROPHICATION SURVEY
STUDY LAKES
STATE OF ARIZONA
LAKE NAME
Big Lake
Fools Hollow Lake
Lake Havasu
Luna Lake
Lyman Lake
Lake Mohave
Lake Pleasant
Lake Powell
Rainbow Lake
Theodore Roosevelt Lake
San Carlos Reservoir
COUNTY
Apache
Navajo
Mohave (San Bernadlno
In CA)
Apache
Apache
Mohave (Clark in NV)
Yavapai, Maricopa
Coconino (Kane, Garfield,
San Juan in UT)
Navajo
Gil a
Graham, Gila, Pinal
-------
J
X •' /-—i
\ it f
\ s
V
,) /
.*"-•.. f \ i
,• \*!Humbolt xy
-.^.^ \
I
\Junction
\
^
v-x, (
! >J
N-...,
\
\
{
\
V
,>'"'
V
(
1X~.
\Js
s'
s 'n ?
\< Ti
'•-. QVs ) 'l
LAKE PLEASANT
Tributary Sampling Site
X Lake Sampling Site
2»Km.
Scale
"Ml.
II2'00'
-------
REPORT ON LAKE PLEASANT, ARIZONA
STORET NO. 0407
I. INTRODUCTION
Lake Pleasant was Included in the National Eutrophication
Survey as a water body of interest to the Arizona State Department
of Health. During the sampling year, tributaries A-2, B-l, C-l
and D-l were dry at the sample collection times and no water
samples could be taken. For this reason, a nutrient budget for
Lake Pleasant based upon annual tributary loadings cannot be
determined. The normalized flow data for tributaries A-l and
A-2 and monthly chemistry data for tributary A-l are included
for the record in Appendices B and D, respectively, in this report.
Although no nutrient budget for this lake was calculated,
it should be noted that there are no known point sources to
the lake, and thus all nutrient loading to the watershed is
produced by diffuse nonpoint contributions such as desert runoff
and grazing activities.
II. CONCLUSIONS
A. Trophic Condition:*
Survey data indicate that Lake Pleasant is eutrophic,
i.e., nutrient rich and highly productive. Whether such
nutrient enrichment is to be considered beneficial
*See Appendix E.
-------
or deleterious is determined by its actual or potential impact
upon designated beneficial water uses of each lake.
Chlorophyll a_ values in the lake ranged from 3.2pg/T to
37.0 pg/1, with a mean of 9.8yg/l. Potential for primary
productivity as measured by algal assay control yields was
moderately low in March and high in November. Secchi disc visi-
bility was low. Of the 11 Arizona lakes sampled in 1975, 6 had
higher median orthophosphorus levels (0.027 mg/1), 9 had higher
median inorganic nitrogen values (0.040 mg/1), and all had
higher median orthophosphorus levels (0.004 mg/1) than Lake
Pleasant.
During March sampling, survey limnologists noted floating
mats of red algae concentrated in the northeast arm of the lake.
B. Rate-Limiting Nutrient:
The algal assay results indicate that Lake Pleasant was
limited by available phosphorus during both sample collection
times (03/05/75, 11/17/75). Lake data suggest primary limitation
by nitrogen in the summer and phosphorus limitation in the spring
and autumn.
-------
III. LAKE CHARACTERISTICS*
A. Lake Morphometry:**
2 t
1. Surface area: 14.16 km .
2. Mean depth: 13.7 meters.
3. Maximum depth: 51.8 meters.
4. Volume: 194.275 x 106 m3.tf
B. Precipitation:
1. Year of sampling: 11.4 cm.
2. Mean annual: 17.9 cm.
*A table of metric/English conversions is included as Appendix A.
**Rathburn, 1974.
"("Average value.
ttMaximum value.
-------
IV. LAKE WATER QUALITY SUMMARY
Lake Pleasant was sampled three times during the open-water
season of 1975 by means of a pontoon-equipped Huey helicopter. Each
time, samples for physical and chemical parameters were collected
from three stations on the lake (additional quality control samples
were taken in March at Stations 01 and 02) and from a number of
depths at each station (see map, page v). During each visit, depth-
integrated samples were collected from each station for chlorophyll
a^ analysis and phytoplankton identification and enumeration. During
the first and last visits, 18.9-liter depth-Integrated samples were
composited for algal assays. Maximum depths sampled were 18.6
meters at Station 01, 7.6 meters at Station 02, and 13.7 meters at
Station 03. For a more detailed explanation of NES methods, see
NES Working Paper No. 175.
The results obtained are presented in full in Appendix C and
are summarized in IV-A for waters at the surface and at the maximum
depth for each site. Results of the phytoplankton counts and chloro-
phyll a_ determinations are included in IV-B. Results of the limiting
nutrient study are presented in IV-C.
-------
STO--ET CODE 040?
A. PHYSICAL AND CHF.flCAL. CHARACTERISTICS
•/ S/7S )
( 6/17/7S )
( 11/17/75 )
°A»tviF TE°
f..o
-AN
Sco« = T
G£ ^'MAK
••<£ 1
".'E-T1-
JftNGt
(K-Ere
•i
:~>^)
NO
So»»
PAIViGE
= 3
MEDIAN
MAX
DEPTH
•^ANGE
("ETERSI N«
qooo
MANGE
= 3
HF.OUM
MAX
DEPTH
RANGE
(METERS)
TEMPEPATUPE (OFjfi CFNT)
O.-l.^ v OE^TH
yflX OF°THO«
14
3
9oH-
7.7-
12.7 11 .»
9.5 8.2
0.0-
7.6-
l.S
11.6
6
3
21.8- 24.4
13.4- 24.2
23.2
14.9
0.0-
4.6-
1.5
14.0
S
3
13.0- 13.6
12.8- 13.6
13.2
12.9
0.0-
0.0-
1.5
9.8
"ISSOLVEO OXYGEM C"5/D
O.-l.S M 'ItPTH
"AX DFPTH»«
CONDUCT I VI TV (IJMHO'")
O.-l.S M OEPT-I
"AX OFPTHoo
PH (STANnAKi.) UNITS)
n .-] .c, ^ oE^TH
MAX 'JFPTH*-*
TOTftL ALKALINITY <«G,
O.-l.c M f»EPTH
"AX OEPTH»<»
TOTAL P (WG/L>
O.-l.S M riEPTH
WAX DFPTH««
DISSOLVFD OPTHQ P (Mf
O.-l.S «^ nFPTH
MAX OFPTH»»
N02*.N03 (MT/L)
O.-l .^ <•< Ot^Th
"A> OFPTt-:««
AMMONIA (MG/L)
n.-l.s « OE^TH
MAX DEPTH**
KJELDAHL M (MG/L)
fi.-l.t; M nEPTH
MAX OFPTW«»
13
3
14
3
14
1
'L>
14
3
14
3
3/L)
14
3
14
3
14
3
14
3
IO.P-
7.')-
47S.-
491.-
8.3-
8.f'-
1 66.-
170.-
0.016-0
0.017-0
0.002-0
0.002-0
0.020-0
0 . 0 2 (i - 0
P.02')-0
0.020-0
0.400-1
0.300-0
11.1 10.6
7.* 7.2
SOS. 430.
447. 49T.
h.s i.S
1.1 1.0
178. 171.
177. 176.
.041 O.OPS
.036 0.033
.009 0.004
.003 0.003
. '( ? r, 0 . 0 P f ;
.';?•! 0.0?u
. ') 6 (1 u . 0 3 0
.020 0.0?l)
.000 0.600
.400 0.40(1
0.0-
706-
0.0-
7.6-
0.0-
7.6-
0.0-
7.6-
0.0-
7.6-
0.0-
7.6-
n.o-
7.6-
o.o-
7.6-
0.0-
7.6-
1 .5
11.6
l.S
18.6
l.S
1H.6
l.S
1-5.6
l.S
11.6
1.5
11.6
l.S
19.6
l.S
18.6
l.S
11.6
6
3
6
3
6
3
6
3
6
3
6
3
^
3
6
3
6
3
5.4- 7.6
0.3- 7.2
590.- 642.
498.- 640.
7.9- h.4
8.3- 8.5
173.- 176.
172.- 182.
0.025-0.038
0.026-0.038
0.01 1-0.027
0.003-0.020
0.020-0.030
0.0?0-0.020
0.030-0.050
0.040-0.110
0.500-1.000
0.400-0.500
6.8
7.0
615.
527.
8.3
8.4
174.
177.
0.02«
0.037
0.016
0.005
0.020
0.020
0.040
0.040
0.650
0.500
0.0-
4.6-
0.0-
4.6-
0.0-
4.6-
0.0-
4.6-
0.0-
4.6-
0.0-
4.6-
0.0-
4.6-
0.0-
4.6-
0.0-
4.6-
1.5
14.0
1.5
14.0
1.5
14.0
1.5
14.0
1.5
14.0
1.5
14.0
l.S
14.0
1.5
14.0
1.5
14.0
5
3
5
3
S
3
5
3
5
3
5
3
S
3
5
3
5
3
7.6- 8.8
8.0- 8.6
402.- 418.
406.- 417.
8.2- 8.3
8.2- ft.?
181.- 189.
181.- 187.
0.036=0.086
0.039-0.086
0.002-0.012
0.002-0.008
0.060-0.080
0.060-0.080
0.030-0.060
0.030-0.060
0.400-0.600
0.400-0.400
8.2
8.0
411.
411.
8.3
8.2
187.
187.
0.054
0.044
0.008
0.004
0.070
0.080
0.060
0.040
0.400
0.400
0.0-
0.0-
0.0-
0.0-
0.0-
0.0-
0.0-
0.0-
0.0-
0.0-
0.0-
0.0-
0.0-
0.0-
0.0-
0.0-
0.0-
0.0-
1.5
9.8
1.5
9.8
1.5
9.8
1.5
9.8
1.5
9.8
1.5
9.8
1.5
9.6
1.5
9.8
1.5
9.8
SECCHI OISC
1 .2- 1.7
1.3
1.7- 2.1
2.1
0.3- 0.3
0.3
o 'I = Ml. OF a
«•» Maxl'njp Ofnr-' SAMPLED AT EACH
i/«o s = NO. UF MTES SAMM.EO ON THIS DOTE
-------
B. Biological Characteristics:
1. Phytoplankton -
Sampling
Date
03/05/75
06/17/75
11/15/75
Dominant
Genera
1. Peri dim'urn
2. Ankistrodesmus
3. Chroomonas?
4. Cryptomonas
5. Me IpsIra
Other genera
Total
1. Centric diatom
2. Tetraedron
3. Melosira
4. Dactylococcopsis
5. Crucigem'a
Other genera
Total
1. Dactylococcopsis
2. Tetrastrum
3. Melosira
4. Nitzschia
5. Crucigem'a
Other genera
Total
Algal
Units
Per ml
540
295
147
98
98
198
1,376
804
739
565
544
261
1.239
4,152
1,518
875
875
669
437
3,188
7,562
-------
2. Chlorophyll a^ -
Sampling Station Chlorophyll a_
Date Number (yg/1)
03/05/75 01 4.0 (7.6, 8.8)*
02 16.4 (11.2, 16.9)*
03 7.5
06/17/75 01 7.5
02 3.8
03 4.6
11/16/75 01 3.3
02 37.0
03 3.2
*Additional samples taken for quality control checks.
-------
C. Limiting Nutrient Study:
1. Autoclaved, filtered, and nutrient spiked
a. 03/05/75
Spike (mg/1)
Control
0.05 P
0.05 P + 1.0 N
1.00 N
b. 11/17/75
Ortho P
Cone, (mg/1)
0.005
0.055
0.055
0.005
Spike (mg/1)
Control
0.05 P
0.05 P + 1.0 N
1.00 N
Ortho P
Cone, (mg/1)
0.020
0.070
0.070
0.020
Inorganic N
Cone, (mg/1)
0.064
0.064
1.064
1.064
Inorganic N
Cone, (mg/1)
0.220
0.220
1.220
1.220
Maximum Yield
(mg/1-dry wt.)
0.4
4.2
20.0
0.4
Maximum Yield
(mg/l-dry wt.)
1.5
9.0
18.8
1.2
-------
2, Discussion -
The control yields of the assay alga, Selenastrum capri-
cornutum*, indicate that the potential for primary productivity in
Lake Pleasant was moderately low during the spring sample collection
time (03/05/75) and high during fall sampling (11/17/75). In both
samples the increase in growth produced beyond that of the control
in response to the addition of phosphorus as well as the lack of
response to the addition of nitrogen, indicates phosphorus limitation.
Maximum yield was achieved by the simultaneous addition of both
phosphorus and nitrogen.
The mean inorganic nitrogen to orthophosphorus ratios (N/P) in
the lake data of 14/1 and 20/1 in the spring and fall, respectively,
suggest primary limitation by phosphorus during those sampling
periods. The N/P ratio of 4/1 during summer sampling suggest nitrogen
limitation at that time.
*For further information regarding the algal assay test procedure
and selection of test organisms, see U.S. EPA (1971).
-------
10
V. LITERATURE REVIEWED
Rathbun, Ned L. 1974. Personal Communication (lake morphometry),
Arizona Game and Fish Department, Phoenix, Arizona.
U.S. Environmental Protection Agency. 1971. Algal Assay
Procedure Bottle Test. National Eutrophication Research
Program, Corvallis, Oregon.
U.S. Environmental Protection Agency. 1975. National Eutrophi-
cation Survey Methods 1973-1976. Working Paper No. 175.
National Environmental Research Center, Las Vegas, Nevada,
and Pacific Northwest Environmental Research Laboratory,
Corvallis, Oregon.
-------
APPENDIX B
TRIBUTARY FLOW DATA
-------
11
VI. APPENDICES
APPENDIX A
CONVERSION FACTORS
-------
CONVERSION FACTORS
Hectares x 2.471 - acres
Kilometers x 0.621/1 = miles
Meters x 3.281 = feet
-4
Cubic meters x 8.107 x 10 = acre/feet
Square kilometers x 0.3861 = square miles
Cubic meters/sec x 35.315 = cubic feet/sec
Centimeters x 0.3937 = inches
*
Kilograms x 2.205 = pounds
Kilograms/square kilometer x 5.711 - Ibs/square mile
-------
TRIouTAKY FLOW INFORMATION FOR ARIZONA
LAKE COUt 0*07
LAKE HLEASANT
ll/26/7b
f
TOTAL DRAINAGE ARtA OF LAKEfSQ KM) 3?7o.fa
TRIdUTARY
0407A1
0407A2
SUB-DRAINAGE
AREAISU KM) JAN
3778.6
2926. 7
852.1
0.142
1.133
0.57
TUTAL
SUM OF
FEb
0.708
2.549
0.28
MAR
1.699
3.398
0.28
1
1
ARR
.416
.133
0.2d
DRAINAGE AREA OF LAKt =
SUB-DRAINAGL AnEAS =
MAY
1.133
0.425
0.28
3778.8
3778.8
NORMALISED FLO*5(CM5»)
JUN JUL AUG SEH
2.124 3.661
0.425 0.566
0.14 0.23
SUMMARY
1.133
U.42
TOTAL FLO*
TOTAL FLO*
2.407
1.699
0.42
IN =
OUT =
OCT NOV
0.142 0.028
0.0 0.0
0.20 0.14
22.60
17.47
OEC MEAN
0.028 1.462
S.663 1.S09
1.13 0.37
MEAN MONTHLY FLOWS AND DAILY FLOwS(CMb)
TRIBUTARY MONTH YEAR MEAN FLO* DAY
0407A1
FLOW DAY
0407A2
12
1
2
3
4
5
6
7
a
9
10
11
12
1
2
3
4
4
5
5
6
7
8
9
10
11
74
75
75
75
75
75
75
75
75
75
75
75
74
75
75
75
75
75
75
75
75
75
75
75
75
75
0.0
0.0
0.0
1.410
2.642
2.192
2.0U4
2.639
3.228
1.736
0.0
0.0
0.031
0.024
0.024
0.031
0.192
0.0
0.017
0.0
O.OOB
0.382
0.010
0.012
0.006
0.006
7
11
IS
17
12
10
14
8
4
10
20
13
7
11
IS
17
12
30
10
30
14
e
4
10
20
13
0.0
0.0
0.0
1.4lb
2.492
2.152
1.869
1.954
3.171
3.341
0.0
0.0
0.0
0.0
0.0
'J.O
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
30
30
7
11
15
If
12
30
10
30
14
b
4
10
20
13
FLO* DAY
3.002
2.067
FLO*
O.U3?
0.027
0.024
0.027
0.062
0.024
0.022
0.012
0.007
0.009
0.014
0.00t>
0.007
0.005
-------
TKltiUTAHY FLOW INFOKMATION FOH AkIZONA 11/36/76
LAKE CODE 0407 LAKE PLEASANT
MEAN MONTHLY FLO*S AND UAILY FLo«b
Tf-IbUTARY MONTrl YEAH MEAN FLO* DAY (-LO* DAY FLO* DAY FLU*
0407ZZ 12 74 0.014
1 It 0.038
2 75 0.042
3 75 0.057
4 75 0.11J
5 7b 0.057
6 75 0.057
7 75 0.283
8 75 0.05V
9 7S 0.057
10 75 0.028
11 75 0.038
-------
APPENDIX C
PHYSICAL AND CHEMICAL DATA
-------
vATL
00010
00300
DO
h k 0 "•
10
73/03/05
75/uo/i 1
75/11/17
or
OAY
09
J9
09
09
'J^
09
13
13
15
13
1 3
15
15
15
15
15
15
15
15
14
14
14
14
14
15
15
13
13
r~
30
30
30
30
30
3U
10
10
10
10
10
10
10
50
50
50
50
50
50
25
25
23
25
25
30
30
30
30
ttT
00 JU
on 05
0020
0030
0045
0060
0000
OOU^
OOlt
002S
0040
0050
0060
0000
0005
0015
0030
oot5
0061
0 0 U 0
0003
0015
oojn
01/46
0000
OOU5
0015
0032
Tfc.-MK
CtNT
11.
11.
11.
11.
9.
9.
11.
11.
11.
lu.
9.
9.
9.
10.
9.
9.
6.
7.
7.
22.
21.
18.
15.
13.
13.
13.
13.
12.
3
4
2
0
6
4
8
6
3
9
6
5
4
1
8
6
7
9
7
6
a
6
3
4
2
0
0
8
MG/L
10
10
8
lu
d
11
10
10
10
9
7
7
8
10
10
10
8
6
7
7
5
6
0
7
0
H
6
8
.4
. £
.0
.0
.2
.4
.8
.«
.4
.2
.0
.6
.6
.4
.4
.B
.8
.0
.6
.2
.4
.0
.1
. 0
.2
.0
.0
.0
00077 000-J4
TrtAiMs^ CNOUCfVr
<;tCCrtI HtLO
INChtS
6b
60
4*2
60
84
12
488
493
483
t99
490
»97
487
490
495
488
475
486
489
492
492
493
605
590
559
514
498
409
402
396
406
0»0701
33 51 25.0 112 16 15.0 3
LAH.t HLEAbANT
04013 AHI^ONA
Iu
7.80
7.50
8.30
8.35
8.25
8.20
B.20
00410
T AL*
CAC03
MG/L
166
171
166
169
170
168
160
166
168
169
169
169
169
1 77
177
176
176
173
176
174
173
177
Id2
172
18/
189
190
187
2111202
CLASS 00
00610 0062b
Nrl3-N TOT KJtL
TOTAL N
M&/L MG/L
0.020
0.020
0.020
0.030
0.020
0.04Q
0.020
0.020
0.020K
0.020K
0.0201V
0.020K
0.020K
0.030
0.020K
0.030
0.020
0.020K
0.020
0.050
0.040
0.040
0.180
0.040
0.060
0.060
0.060
0.040
1.000
0.300
0.400
0.-+00
0.400
0.700
0.300
0.400
0.400
0.400
0.300
0.800
0.300
0.400
0.400
0. JOO
0.300
0.300
0.700
0.500
O.bOO
0.500
0.400
0.500
O.oOO
0.400
0.<*UO
00630 00&71
N02iN03 PHOS-OIS
N-TOTAL OKTnO
MG/L MG/L f
0.020K
0.020
0.040
0.020
0.020K
0.020K
0.020K
0.020K
0.020K
0.020K
0.020K
0.020K
0.020K
0.020K
0.020K
0.020
0.020
0.020K
0.020K
0.020K
0.020K
0.020K
0.020
0.020K
0.080
O.OrtO
o.nuo
0.080
0.004
0.009
O.OOo
0.005
0.004
0.008
0.003
0.008
0.004
O.OOJ
0.003
0.003
0.002
0.004
0.003
0.004
0.003
0.002
0.003
0.026
0.027
0.027
0.040
O.OOb
0.007
O.OOo
0.006
0.004
K VALUE KNOWN TO BE LESS
THAN INDICATED
-------
SIOKtT KtT-'ic.vML UATc.
NATL EUT«Or>nICATIOiN SOrfvtY
EPA-LAS VtliAS
040701
33 bl <:b.O 112
LAKE PLEASANT
04013 ARIZONA
16 15.0 3
110491
lltPALtb 2111202
00t>4 FEET UEI-Th CLASS 00
32217 00031
ui.TE TIME US.*-"!1-! P-IOb-TOT CHLKPhfL INCOT LT
TO UAY FEtT M13/L P Uli/L PERCENT
75/03/05
75/06/17
75/11/17
09
09
09
09
09
09
15
lb
13
15
lb
15
15
15
15
15
15
15
15
14
14
14
14
14
15
lb
15
15
30
30
30
30
30
30
10
10
10
10
10
10
10
50
50
50
50
50
50
25
25
25
25
25
30
30
30
30
0000
0005
oo^n
0030
00<*5
OOb'l
0000
0005
0015
00^:5
0040
OObO
0060
0000
0005
0015
0030
0045
OObl
0000
0005
OOiS
0030
00
-------
rftT^icVAL
KO^nl
VEbAb
76/11/26
SURVEY
04070 OuuO
14 3b OOUb
14 33 0015
14 Jb 0023
7b/GVOb 10 30 0000
10 30 UUUb
10 30 0015
10 JO 002*
Ib Ob 0000
Ib Ob OOUb
Ib Ob OOlb
16 Ob OUOK
0.020K
0.060
00671
•-MOS-OIS
OKTnO
Mfa/L H
0.006
0.004
0.003
0.004
0.004
0.003
O.OOj
D.OOJ
O.OOh
O.OOt
O.OOj
0.003
0.020
O.Ole-
O.OOj
O.Oue
-------
?TOKr.T
VuGAS
y o 0 1 0
OATt
I-KO1"
Tu
75/03/05
75/U6/17
75/11/17
TlMt
ot-
UAY
11 25
11 23
11 2b
11 25
11 25
11 2b
14 10
14 10
14 10
14 10
15 10
15 10
15 10
ufc.K'Tn
FttT
U 0 0 f I
nous
0015
00«!5
0035
004^5
0000
0005
0015
003"
00 01)
0005
001%
a A ft*
TtMP
Ct.NT
11 ,H
11. ?
11.4
10.4
9.7
9.5
23.2
23.2
22. /
14.9
13. J
1-J.l)
12.9
00300
UO
Mb/L
lO.b
d.2
9.2
8.0
/ .(J
6.d
b.6
6.0
0.3
a. a
7.6
ti.il
(jQ()f7 00094
TKAMS^ CNOOCTW
StCCrtI HELD
iNCntS MICKOf^rtO
OO 491
492
486
498
<»91
14 t>l*r
61 V
611
527
10 418
412
417
0*1.0703
Jj 52 3<».0 112 16 25*0 3
04013
110491
0050 FEtT UE>TH
00400
Pl-i
su
8.4U
b.40
a.3o
b.05
H.OO
8.40
6.40
6.30
8.30
00410
T ALK
CAC03
Mlj/L
172
171
169
167
169
170
173
174
182
211
H CLAbS
00610
iMrt3-N
TOTAL
M6/L
0.020K
0.020*
0.020*
0.020*
OeQ20*
0.020*
0.040
0.030
0.030
0.110
0.050
0.060
0.060
1*!02
00
00625
ror Kjtt
N
Mfa/L
0.-500
0.500
a. ^00
0.400
0.400
0.400
O.euo
0.600
0.300
0.300
0.400
0.400
0.400
00630
NOP&N03
N-TOTAL.
MG/L
0.020*
O.U20*
0.020K
0.020K
0.020K
0.020*
0.020K
0.020*
0.020*
0.020K
0.070
0.070
0.080
00-371
KHOS-UlS
L)K (n(J
M
0.
U.
U.
0.
0.
TOT CHLKHHYL INCDT LT
A KffMNING
P Uli/L DFKCtNT
032 7.5
023
0^0
i'22
0^3
0^3
027 3.2
025
027
037
059 3.2
05f
044
K VALUE KNOWN TO BE LESS
THAN INDICATED
-------
APPENDIX D
TRIBUTARY AND WASTEWATER
TREATMENT PLANT DATA
-------
STORET RETRIEVAL UATE 76/11/30
NATL EUTROPHICATION
EPA- LAS VEGAS
0407A1
33 51 10.0 i!2 16 05.0 4
AuUA FRIA HIVEfi
0* 7.5 BALOY MTN
o/LAKt PLEASANI
8ELO rfAOOELL DAM 1.1 H N LK PLEASANT INN
11EPALES 211120*
0000 FEET DEHTh CLASS 00
OATE
FHO.M
TO
74/12/07
75/01/11
75/02/15
75/03/17
75/04/12
75/04/30
75/05/10
75/05/30
75/06/14
75/07/08
75/08/04
75/09/10
75/10/20
75/11/13
TIME i
OK
DAY 1
15 20
11 00
10 10
1C 00
09 20
11 10
14 30
10 40
14 30
14 15
12 15
09 20
10 28
11 10
FEET
00630
N02t>N03
N-TOTAL
MG/L
0.06*
0.008
0.048
0.006
0.005
0.010
0.005
0.020
U.010
0.010
0.005
0.010
0.110
0.035
00625
TOT KJEL
N
MG/L
0.750
0.600
1.000
1.600
0.900
2.400
0.600
0.500
0.750
0.850
0.650
0.900
0.200
0.600
00610
NH3-N
TOTAL
MG/L
0.020
0.016
0.008
0.015
0.025
0.030
0.020
O.UB7
0.165
0.055
0.055
0.015
0.17S
0.005K
00671
PHOS-UIS
ORTHO
MG/L V
0.045
0.020
0.040
0.010
0.02U
0.005*
0.010
0.045
0.055
0.050
0.015
0.015
0.080
0.075
00665
PHOS-TOT
MG/L P
0.080
0.070
0.100
0.030
0.070
0.040
0.030
0.050
0.070
0.080
0.060
0.070
0.120
0.090
K VALUE KNOWN TO BE LESS
THAN INDICATED
-------
APPENDIX E
PARAMETRIC RANKINGS OF LAKES
SAMPLED BY NES IN 1975
STATE OF ARIZONA
Mean or median values for six of the key parameters evaluated
in establishing the trophic conditions of Arizona lakes sampled
are presented to allow direct comparison of the ranking, by parameter,
of each lake relative to the others. Median total phosphorus, median
inorganic nitrogen and median dissolved orthophosphorus levels are
expressed in mg/1. Chlorophyll £ values are expressed in yg/1.
To maintain consistent rank order with the preceding parameters,
the mean Secchi disc depth, in inches, is subtracted from 500.
Similarly, minimum dissolved oxygen values are subtracted from 15
to create table entries.
-------
LAKE DATA TO BE USED IN RANKINGS
LAKE
CODE LAKE NAME
0401 BIG LAKE
0402 FOOLS HOLLOW
0403 LAKE HAVASU
0404 LUNA LAKE
0405 LYMAN LAKE
0406 LAKE. HOHAVE
0407 LAKE PLEASANT
0408 LAKE POWELL
0409 RAINBOW LAKE
0410 ROOSEVELT LAKE
0411 SAN CARLOS. RESERVOIR
3201 LAKE HEAD
MEDIAN
TOTAL P
0.032
0*059
0.015
0.182
0.099
6.017
0.027
0.009
0.046
0.020
0.056
0.020
MEDIAN
INORG N
0.090
0.090
0.170
0.050
0.060
0.240
0.040
0.400
0.045
0.040
0.060
0.505
500-
MEAN SEC
386.000
466.600
420.231
396.250
484.667
369.667
449.154
239.000
440.750
429.917
474.500
453.600
MEAN
CHLORA
2.900
10.683
3.948
3.400
2.633
4.404
9.808
1.333
16.367
4.073
14.750
1.150
15-
MIN DO
9.000
14.800
10.800
12.200
9.000
8.600
14.900
12.200
12.000
14.000
14.600
8.000
MEDI,
OISS ORTl
0.007
0.014
0.005
0.131
0.056
0.010
0.004
0.010
0.009
0.008
0.009
0.007
-------
€E^i or LAKES WITH HSSKER VALUES CLUMBER OF LAKES KITH HIGHER VALUES)
LAKE
CODE LAKE ?*AME
0464 BIG LAKE
0402 FOOLS HOLLOW
0403 LAKE HAVASU
0404 LUNA LAKE
0405 LYMAN LAKE
0406 LAKE MOHAVE
6407 LAKE PLEASANT
0408 LAKE POWELL
0409 RAINBOW LAKE
0410 ROOSEVELT LAKE
0411 SAN CARLOS RESERVOIR
3201 LAKE HEAD
MEDIAN MEtfl
TOTAL P I NOR
45 C SS 4|
is i
91 i
0 (
9 (
82 <
55 (
100 (
36 (
68 (
27 (
68 (
2D
10)
0)
1)
9)
6)
11)
4)
7)
3)
7)
41
27
73
64
18
95
9
82
.95
55
0
:m
:6 X
£ £>i Ji
« 3)
C 8)
C 7)
( 2)
( 10)
C 1)
( 9)
( 10)
( 6)
( 0)
SGS-
MEAN SEC
18 i
64 i
73 <
0 «
91 (
36 (
100 (
45 <
S5 <
9 1
27 <
:^3 *,
£ e
; 7)
; @)
: o)
: ip)
; 4)
i ID
I 5)
I 6)
[ 1)
E 3)
MEAN
CHLCRA
73 { 8)
18 i
55 1
64 C
32 (
36 (
2? C
91 (
0 (
45 (
9 (
100 (
21
6)
71
9)
4)
3)
10)
0)
5)
1)
11)
15-
' HIM 00
77 ( 8)
9 (
64 {
41 (
77 (
91 (
0 <
41 (
55 (
27 <
18 (
100 1
1)
7)
4)
3)
10)
0)
4)
6)
3)
2)
11>
MEDIAN
DISS OHTHO
73 ( 8)
18 (
91 t
0 (
9 {
32 <
100 C
32 (
45 (
64 (
55 (
82 <
2)
10)
0)
1)
3)
11)
3)
5)
7)
6)
9)
------- |