U.S. ENVIRONMENTAL PROTECTION AGENCY
NATIONAL EUTROPHICATION SURVEY
WORKING PAPER SERIES
REPORT
ON
CONCHAS RESERVOIR
SAN MIGUEL COUNTY
NEW MEXICO
EPA REGION VI
WORKING PAPER No, 819
CORVALLIS ENVIRONMENTAL RESEARCH LABORATORY - CORVALLIS, OREGON
and
ENVIRONMENTAL MONITORING & SUPPORT LABORATORY - LAS VEGAS, NEVADA
-------
REPORT
ON
CONCHAS RESERVOIR
SAN MIGUEL COUNTY
NEW MEXICO
EPA REGION VI
WORKING PAPER No, 819
WITH THE COOPERATION OF THE
NEW MEXICO ENVIRONMENTAL IMPROVEMENT AGENCY
AND THE
NEW MEXICO NATIONAL GUARD
JULY, 1977
-------
REPORT ON CONCHAS RESERVOIR
SAN MIGUEL COUNTY, NEW MEXICO
EPA REGION VI
by
National Eutrophication Survey
Water and Land Quality Branch
Monitoring Operations Division
Environmental Monitoring & Support Laboratory
Las Vegas, Nevada
and
Special Studies Branch
Con/all is Environmental Research Laboratory
Corvallis, Oregon
Working Paper No. 819
OFFICE OF RESEARCH AND DEVELOPMENT
U.S. ENVIRONMENTAL PROTECTION AGENCY
July 1977
-------
CONTENTS
Page
Foreword i i
List of New Mexico Study Lakes iv
Lake and Drainage Area Map v
Sections
I. Conclusions 1
II. Lake and Drainage Basin Characteristics 4
III. Lake Water Quality Summary 6
IV. Nutrient Loadings 12
V. Literature Reviewed 17
VI. Appendices 18
-------
ii
FOREWORD
The National Eutroph1cat1on Survey was Initiated 1n 1972 1n
response to an Administration commitment to Investigate the nation-
wide threat of accelerated eutrophlcation to freshwater lakes and
reservoirs.
OBJECTIVES
The Survey was designed to develop, 1n 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 nonpolnt source pollution abatement in lake water-
sheds.
ANALYTIC APPROACH
The mathematical and statistical procedures selected for the
Survey's eutropMcatlon 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 eutrophicatlon 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 1s formatted to provide state
environmental agencies with specific Information for basin
planning [§303(e)], water quality criteria/standards review
[§303(c)L clean lakes [§314(a,b)], and water quality monitoring
[§106 and §305(b)] activities mandated by the Federal Water
Pollution Control Act Amendments of 1972.
-------
iii
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, multivariate evaluations for the relationships
between land use, nutrient export, and trophic condition, by lake
class or use, are being developed to assist in 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 New Mexico Environmental
Improvement Agency for professional involvement, to the New Mexico
National Guard for conducting the tributary sampling phase of the
Survey, and to those New Mexico wastewater treatment plant operators
who provided effluent samples and flow data.
The staff of the Surveillance Section, Water Quality Division,
New Mexico Environmental Improvement Agency provided invaluable lake
documentation and counsel during the Survey, reviewed the preliminary
reports and provided critiques most useful in the preparation of
this Working Paper Series.
Brigadier General Franklin E. Miles, the Adjutant General of
New Mexico, and Project Officer Colonel Marvin D. Bohannon, who
directed the volunteer efforts of the New Mexico National Guardsmen,
are also gratefully acknowledged for their assistance to the Survey.
-------
IV
NATIONAL EUTROPHICATION SURVEY
STUDY LAKES
STATE OF NEW MEXICO
LAKE NAME
Alamogordo Reservoir
(Sumner Lake)
Bluewater Lake
Conchas Reservoir
Eagle Nest Lake
Elephant Butte Reservoir
El Vado Reservoir
Lake McMillan
Ute Reservoir
COUNTY
De Baca, Guadalupe
Valencia, McKinley
San Miguel
Col fax
Sierra
Rio Arriba
Eddy
Quay
-------
CONCHAS RESERVOIR
$$ tributary Sampling Site
X L.iko S.iiuplinq SUc
i£ MKm.
™ is Mi.
bcaln
-------
REPORT ON CONCHAS RESERVOIR, NEW MEXICO
STORE! NO. 3503
I. CONCLUSIONS
A. Trophic Condition:*
Based upon Survey data, Conchas Reservoir is considered
mesotrophic with a tendency towards a eutrophic condition
during summertime. Chlorophyll a^ values in the lake were
typical of those observed in a mesotrophic water body; with
ranges from 0.9 yg/1 to 8.9 yg/1, and a mean of 3.3 yg/1.
Secchi disc visibility was low and potential for primary
production as measured by algal assay control yields was
generally moderate. Of the nine New Mexico lakes sampled
in 1975 (including Navajo Reservoir), eight had higher median
total phosphorus levels (0.020 mg/1), seven had higher median
inorganic nitrogen values (0.040 mg/1) and six had higher
median orthophosphorus levels (0.004 mg/1) than Conchas
Reservoir.
Survey limnologists did not report any problem algal
blooms or macrophyte growths during their visits to the lake.
The New Mexico Environmental Improvement Agency (1974) reports
the lake has good water quality but that during low water
years high productivity and nutrient levels in the lake could
result in undesirable algal growths.
*See Appendix E.
-------
B. Rate-Limiting Nutrient:
Algal assay results indicate Conchas Reservoir was limited
by available phosphorus levels during the 1975 sampling year.
The lake data suggest primary limitation by nitrogen during spring
and summer sampling and phosphorus limitation in autumn.
C. Nutrient Controllability:
1. Point sources -
There were no known point sources impacting Conchas
Reservoir during the sampling year.
The estimated annual phosphorus loading of 0.29 g P/m /yr
was greater than Vollenweider's (1975) proposed "oligotrophic"
level but less than his "eutrophic" loading. However, actual
annual loading to the reservoir may be substantially higher,
as a number of the tributaries draining into Conchas Lake were
dry at the times when water samples were collected and no
information on nutrient contributions to the lake budget from
these tributaries is presently available. Other sources (New
Mexico Environmental Improvement Agency, 1974; New Mexico Water
Quality Control Commission, 1975) report that this lake faces
possible enrichment problems as a result of rapid shoreline
development and heavy recreational use. In light of the
existing tendency towards nuisance algal growths during low
water years with only nonpoint sources of enrichment, the lake
-------
should be carefully monitored around newly developing areas
for any signs of water quality deterioration.
2. Nonpoint sources -
Nonpoint sources were estimated to have contributed
all of the nutrient contributions to Conchas Reservoir during
the sampling year. The New Mexico Water Quality Control
Commission (1975) reports that nutrient enrichment in this
lake is generally considered to result from natural leaching
of nutrients from the arid Upper Sonoran watershed.
-------
II. LAKE AND DRAINAGE BASIN CHARACTERISTICS
Lake and drainage basin characteristics are itemized below.
Lake morphometry data were provided by Martin and Hanson (1966)
and Tony Drypolcher (personal communication). Tributary flow data
were provided by the New Mexico District Office of the U.S. Geological
Survey (USGS). Outlet drainage area includes the lake surface area.
Mean hydraulic retention time was obtained by dividing the lake
volume by mean flow of the outlet. Precipitation values are estimated
by methods as outlined in National Eutrophication Survey (NES)
Working Paper No. 175. A table of metric/English conversions is
included as Appendix A.
A. Lake Morphometry:
1. Surface area: 38.83 km2.
2. Mean depth: 11.8 meters.
3. Maximum depth: 43.0 meters.
4. Volume: 456.638 x 106 m3.
5. Mean hydraulic retention time: 1106 days(3.0 yrs)
-------
B. Tributary and Outlet:
(See Appendix B for flow data)
1. Tributaries -
Drainage Mean Flow
Name
area (km2) (m3/sec)
A-2 Canadian River 15,578.8 3.84
C-l Cuervo Creek 655.3 0.11
D-l Conchas River 1,354.6 0.40
E-l Trementina Creek 168.3 0.05
F-l Unnamed Stream 5.4 <0.01
Minor tributaries and
immediate drainage - 1,388.3 0.36
Total 19,150.7 4.76
2. Outlet - A-l Canadian River 19,189.3 4.78
C. Precipitation:
1. Year of sampling: 27.8 cm.
2. Mean annual: 33.2 cm.
-------
III. LAKE WATER QUALITY SUMMARY
Conchas Reservoir 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 four stations on the lake 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 19.8 meters at Station
01, 15.2 meters at Station 02, 18.6 meters at Station 03, and
13.7 meters at Station 04. 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 III-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 III-B. Results of the
limiting nutrient study are presented in III-C.
-------
ST3 = £T c l~c 35T3
B A 4 t •• fT C i
TE'.'JF.3AT'J-E' frpfHO»
DISSOLVED OXYGEN
o.-i.5 u OE»TH
VAX OEPTH«»
CONDUCTIVITY (Ijw
O.-l.S M DEPTH
«AX DEPTH*'
PH (STAf-iOAwG UNI
0.-l.c M OEPTH
WAX DEPTH*"
TOTAL ALKALINITY
n.-i.s M OEPTH
MAX DFPTH«»
TOTAL P < "<",/(. )
O.-l.S M DEPTH
MAX DEPTH«»
DISSOLVED Ox'THO
0.-1.5 M DEPTH
MAX OF_PTH««
N02*N03 (MG/L)
o.-i.s » OEPTH
VAX DEPTH*"
AMMONIA (MG/L)
0.-1.5 M OEPTH
MAX OFPTHo*
KJELDAHL N (MG/L
O.-l.S M DEPTH
MAX OEPTWO<>
t
C^;T>
A
4
<*"G/L>
8
4
HO^l
8
4
TS)
8
4
("G/D
8
4
a
4
P (MG/L)
8
4
8
4
9
4
>
8
4
-i *o*
- " ' . '*-.
12.3- 13.-
1".5- 1^.1
8.4- 9.2
7.?- 8.5
672.- 730.
656.- 6^5.
a. 3- 8.4
8.3- 8.4
160.- 168.
161.- 165.
1.011-0.018
0.015-0.187
0.004-0.017
0.003-0.019
0.020-0.050
0.020-0.040
0.020-0.030
0.040-0.060
0.200-0.400
0.300-0.600
/ 1/7--
= 4
v - T T i (v,
13.1
11.3
8. a
7.4
69n.
66P.
8.3
P. j
164.
16?.
0.0)3
0.044
0.011
o.onb
0.020
0.030
0.0?5
0.045
0.3SO
o.^qp
1
«4*
"EPT-
-A^•GP
'"hTr
n.O-
1?.5-
0.0-
1?.5-
0.0-
12.5-
n.o-
12.5-
0.0-
1?.5-
0.0-
12.5-
0.0-
12.5-
0.0-
12.5-
0.0-
1?.5-
0.0-
12.5-
Pnr'sICfiL A^'J Cr-PwICAL CnAhiA
( 4/21/75
1 S°0° = 4
'->S) '.w "iNoE "tDI'N
l.S
19.8
1.5
19. S
1.5
19.6
l.S
19.8
1.5
19.8
l.S
19.8
1.5
19. H
l.S
19. a
1.5
19.8
1.5
19. H
4
8
4
8
4
u
4
e
4
8
4
8
4
P.
4
M
4
8
4
21.9-
17.3-
6.6-
0.6-
24.1
18.4
7.6
1.2
967. -1044.
685.-
8.2-
7.7-
145.-
131.-
0.021-0
0.032-0
0.004-0
0.008-0
0.020-0
0.020-0
0.020-0
0.020-0
0.200-0
0.200-0
948.
8.4
8.4
153.
171.
.040
.044
.012
.021
.020
.100
.030
.140
.300
.500
23.4
17.9
7.0
0.9
1017.
866.
8.3
7.9
150.
152.
0.024
0.042
0.004
0.010
0.020
0.020
0.020
0.110
0.300
0.350
CTtrtlSTICS
)
MAX
DEPTM
3ANGE!
("ETERSJ NO
0.0-
13.1-
0.0-
13.1-
0.0-
13.1-
0.0-
13.1-
0.0-
13.1-
0.0-
13.1-
0.0-
13.1-
0.0-
13.1-
0.0-
13.1-
0.0-
13.1-
1.5
17.4
1.5
17.4
1.5
17.4
1.5
17.4
1.5
17.4
1.5
17.4
1.5
17.4
l.S
17.4
1.5
17.4
1.5
17.4
a
4
8
4
7
4
8
4
8
4
8
4
8
4
8
4
8
4
fi
4
( \0/ 2/75
Sooe = 4
3ANGE MEDIAN
19.7- 20.0
19.1- 19.4
5.8- 7.2
5.6- 7.0
717.- 770.
712.- 752.
8.2- 8.3
8.2- 8.3
146.- 153.
149.- 152.
0.017-0.022
0.0?0-0.037
0.002-0.003
0.002-0.003
0.020-0.030
0.020-0.030
0.020-0.030
0.020-0.030
0.200-0.400
0.300-0.600
19.8
19.3
6.6
6.3
750.
751.
8.3
8.3
150.
150.
0.018
0.032
0.002
0.003
0.020
0.020
0.020
0.025
0.400
0.400
)
MAX
DEPTH
RANGE
(METERS)
0.0- 1.5
11.0- 16.8
0.0- 1.5
11.0- 16.8
0.0- 1.5
11.0- 16.8
0.0- 1.5
11.0- 16.8
0.0- 1.5
11.0- 16.8
0.0- 1.5
11.0- 16.8
0.0- 1.5
11.0- 16. li
0.0- 1.5
11.0- 16.8
0.0- 1.5
11.0- 16.8
0.0- 1.5
11.0- 16.8
SECCHI DISC
0.9- 1.5
1.2
1.1- 1.5
1.3
0.8- 1.5
1.1
» N = NO. OF SAML>LtS
«•» MAXIMUM DEPTH SAMPLED AT EACH SITE
»»» s = NO. OF SITES SAMPLED ON THIS DATE
-------
8
B. Biological Characteristics:
1. Phytoplankton -
Sampling
Date
05/01/75
08/21/75
10/02/75
Dominant
Genera
1. Chroomonas ?
2. Ankistrodesmus
3. Oocystis
4. Asterionella
Other genera
Total
1.
2.
3.
4.
5.
Chroomonas ?
Oocystis
Ankistrodesmus
Oscillatoria
Cryptomonas
Other genera
Total
1. Chroomonas ?
2. Cryptomonas
3. Trachelomonas
4. Scenedesmus
5. Ankistrodesmus
Other genera
Total
Algal
Units
per ml
915
335
134
45
1,429
402
183
110
73
37
72
877
118
59
29
29
29
30
294
-------
2. Chlorophyll
Sampling Station Chlorophyll a_
Date Number (yg/1)
05/01/75 01 1.3
02 0.9
03 1.4
04 2.5
08/21/75 01 3.9
02 5.0
03 4.1
04 8.9
10/02/75 01 2.7
02 3.0
03 1.8
04 3.8
-------
10
C. Limiting Nutrient Study:
1. Autoclaved, filtered, and nutrient spiked
Spike (mg/1)
Ortho P
Cone, (mg/1)
Inorganic N
Cone, (mg/1)
a. 05/01/75
Control
0.05 P
0.05 P + 1.0 N
1.00 N
Control
0.05 P
0.05 P + 1.0 N
1.00 N
b. 10/02/75
Control
0.05 P
0.05 P + 1.0 N
1.00 N
Stations 01,04
<0.005
<0.055
<0.055
<0.005
Stations 02,03
<0.005
<0.055
<0.055
<0.005
Stations 01-04
0.005
0.055
0.055
0.005
0.055
0.055
1.055
1.055
0.045
0.045
1.045
1.045
0.100
0.100
1.100
1.100
Maximum Yield
(mg/1-dry wt.)
0.4
3.2
14.4
0.2
0.1
3.5
16.4
0.2
0.3
6.3
20.8
0.3
-------
11
2. Discussion -
The control yields of the assay alga, Selenastrum capricornutum,
indicate that the potential for primary productivity in Conchas
Reservoir was moderately low during the sample collection times
(05/01/75, 10/02/75). In all assays, the increased growth of the
test alga over the control yield 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 nitrogen and phosphorus.
The mean inorganic nitrogen to orthophosphorus (N/P) ratios
in ihe lake data were approximately 6/1, 9/1 and 23/1 in the spring,
summer, and fall, respectively, suggesting primary limitation by
nitrogen in the spring and summer and phosphorus limitation in the
fall (a mean N/P ratio of 14/1 or greater generally reflects phos-
phorus limitation).
-------
12
IV. NUTRIENT LOADINGS
(See Appendix D for data)
For the determination of nutrient loadings, the New Mexico
National Guard collected monthly near-surface grab samples from
each of the tributary sites indicated on the map (page v), except
for the high runoff months of April and May when two samples were
collected. Sampling was begun in December 1974, and was completed
in November 1975.
Through an interagency agreement, stream flow estimates for
the year of sampling and a "normalized" or average year were pro-
vided by the New Mexico District Office of the USGS for the tribu-
tary sites nearest the lake.
In this report, nutrient loads for sampled tributaries were
determined by using a modification of a USGS computer program for
calculating stream loadings. Nutrient loads indicated for tribu-
taries are those measured minus known point source loads, if any.
Nutrient loadings for unsampled "minor tributaries and imme-
diate drainage" ("ZZ" of USGS) were estimated by using the mean
2
annual nutrient loads, in kg/km /year, of the Canadian River at
2
Station A-2 and multiplying the means by the ZZ area in km .
-------
13
A. Waste Sources:
1. Known municipal - None
2. Known industrial - None
B. Annual Total Phosphorus Loading - Average Year:
1. Inputs -
% of
Source kg P/yr total
a. Tributaries (nonpoint load) -
A-2 Canadian River 9,245 80.7
C-l Cuervo Creek ?
D-l Conchas River 95 0.8
E-l Trementina Creek ? —
F-l Unnamed Stream ? —
b. Minor tributaries and immediate
drainage (nonpoint load) - 1,390 12.2
c. Known municipal STP's - None
d. Septic tanks* - 40 0.4
e. Known industrial - None
f. Direct precipitation** - 680 5.9
Total 11,450 100.0%
2. Outputs - A-l Canadian River 690
3. Net annual P accumulation - 10,760
*Estimate based on 126 lakeshore residences, 3 parks and 1 camp,
**Estimated (See NES Working Paper No. 175).
-------
14
C. Annual Total Nitrogen Loading - Average Year:
1. Inputs -
% of
Source kg N/yr total
a. Tributaries (nonpoint load) -
A-2 Canadian River 111,560 61.5
C-l Cuervo Creek ?
D-l Conchas River 16,690 9.2
E-l Trementina Creek ?
F-l Unnamed Stream ?
b. Minor tributaries and immediate
drainage (nonpoint load) - 9,720 5.4
c. Known municipal STP's - None
d. Septic tanks* - 1,520 0.8
e. Known industrial - None
f. Direct precipitation** - 41,920 23.1
Total 181,410 100.0%
2. Outputs - A-l Canadian River 624,795
3. Net annual N export*** - 443,385
*Estimate based on 126 lakeshore residences, 3 parks and 1 camp.
**Estimated (See NES Working Paper No. 175).
***Export probably due to unknown sources and/or sampling error.
-------
15
D. Mean Annual Nonpoint Nutrient Export by Subdrainage Area:
9 2
Tributary kg P/knr/yr kg N/km /yr
Canadian River 1 7
Conchas River <1 12
E. Mean Nutrient Concentrations in Ungaged Streams:
Mean Total P Mean Total N
Tributary (mg/1) (mg/1)
B-l Conchas Canal 0.019 0.683
E-l Trementina Creek 0.420 2.020
-------
16
F. Yearly Loadings:
In the following table, the existing phosphorus annual
loading is compared to the relationship proposed by Vollenweider
(1975). Essentially, his "eutrophic" loading is that at which
the receiving waters would become eutrophic or remain eutrophic;
his "oligotrophic" loading is that which would result in the
receiving water remaining oligotrophic or becoming oligotrophic
if morphometry permitted. A "mesotrophic" loading would be
considered one between "eutrophic" and "oligotrophic".
Note that Vollenweider's model may not apply to lakes with
short hydraulic retention times or in which light penetration is
severely restricted by high concentrations of suspended solids
in the surface waters.
Total Yearly
Phosphorus Loading
(g/m2/yr)
Estimated loading for Conchas Reservoir 0.29
Vollenweider's "eutrophic" loading 0.39
Vollenweider's "oligotrophic" loading 0.20
-------
17
V. LITERATURE REVIEWED
Drypolcher, Tony. 1975. Personal communication (lake morphometry).
New Mexico Environmental Improvement Agency, Santa Fe, New Mexico.
Martin, R. 0. R., and R. L. Hanson. 1966. Reservoirs in the United
States. Geological Survey Water Supply Paper 1838. United States
Department of Interior, Geological Survey, Washington, D.C.
New Mexico Environmental Improvement Agency. 1974. Draft report on
New Mexico Reservoirs prepared for 314A of the Federal Water Pol-
lution Control Act. Water Quality Division, Santa Fe, New Mexico.
New Mexico Water Quality Control Commission. 1975. Water Quality
in New Mexico. Santa Fe, New Mexico.
U.S. Environmental Protection Agency. 1975. National Eutrophica-
tion Survey Methods 1973-1976. Working Paper No. 175. National
Environmental Research Center, Las Vegas, Nevada, and Pacific
Northwest Environmental Research Laboratory, Corvallis, Oregon.
Vollenweider, R. A. 1975. Input-Output Models With Special
Reference to the Phosphorus Loading Concept in Limnology.
Schweiz. Z. Hydrol. 37:53-84.
-------
18
VI. APPENDICES
APPENDIX A
CONVERSION FACTORS
-------
CONVERSION FACTORS
Hectares x 2.171 = acres
Kilometers x 0.6214 = miles
Meters x 3.201 = feet
Cubic meters x 8.107 x 10 = acre/feet
Square kilometers x 0.3861 = square miles
Cubic rnoters/sec x 35.315 = cubic feet/sec
Centimeters x 0.3937 = inches
Kilograms x 2.205 - pounds
Kilograms/square kilometer x 5.711 - Ibs/squarc mile
-------
APPENDIX B
TRIBUTARY FLOW DATA
-------
TSIBUTAKY FLO* INFORMATION FOR NE* MEXICO
LAKE CODE 3603 CONChAS RESERVOIR
TOTAL ORAIfxAGE AREA OF LAKE(SO KM) 19189.3
12/16/76
SUB-DPA I "'AGE
TRIBUTARY AHEA(SJ KM)
JAN
FEB
MAk
APR
MAY
NORMALIZED FLOWS(CMS)
JUN JUL AU6
SEP
OCT
NOV
3503*1
3503A2
3503C1
3503D1
3503E1
3503F1
3503?Z
19189.3
15578. e
655.3
1354.6
168.3
5.4
1427.1
0.8S
0.76
o.ool
0.045
0.002
0.000
0.065
0.68
0.57
0.010
0.054
0.005
0.000
0.051
n.82
0.68
0.012
0.062
0.007
0.000
0.062
2.44
2.04
0.034
0.178
0.021
0.001
0.184
8.5
TRIBUTARY MONTH YEAR MEAN FLOta DAY
3503A1
3503A2
12
1
2
3
4
5
6
7
8
9
10
11
12
1
Z
3
4
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
0.156
0.016
0.0
0.051
0.088
0.016
0.051
0.0
0.096
0.054
0.212
0.085
0.340
0.736
1.019
0.680
0.934
0.963
2.294
2.577
1.538
2.124
0.453
0.340
7
4
1
1
S
4
<»
1?
23
11
4
24
7
1
1
5
4
9
\?
23
4
24
FLOW DAY
0.269
0.255
0.0
0.0
0.0
0.0
0.0
n.o
0.0
0.0
0.0
0.057
0.266
20
15
FLO* DAY
0.0
0.0
FLOW
1.218
1.019
0.453 20
0.821 15
1.756
0.595
0.311
0.765
0.0
2.577
0.218
-------
TRIBUTARY FLO* INFORMATION FO» NEW MEXICO
LAKE CCOt 3503
MEAN MONTHLY FtCWS AND DAILY FLO*S(C«S>
350351
3503C1
3503D1
3503E1
YEAO
12
1
2
3
&
5
6
7
e
9
10
11
12
1
2
3
4
5
6
7
8
9
10
11
12
1
2
3
4
5
6
7
8
9
10
11
12
1
2
3
4
5
6
7
a
9
in
ll
74
75
75
75
75
75
75
75
75
75
75
75
74
75
75
75
75
75
75
75
75
75
75
75
74
75
75
75
75
75
75
75
75
75
75
75
74
75
75
75
75
75
75
75
75
75
75
75
MEAN FLO* OAY
0.0
0.0
0.0
0.0
1.104
7.646
4.134
2.577
5.805
4.248
3.228
0.0
0.0
0.0
0.001
0.001
0.001
0.004
0.0
0.159
0.311
0.002
0.0
0.0
0.002
0.003
0.006
0.003
0.003
0.025
0.0
0.340
0.793
0.004
0.0
0.0
0.0
0.0
0.001
0.000
0.000
0.002
0.0
0.076
0.122
0.001
0.0
0.0
7
4
1
1
S
4
q
1?
23
13
4
24
7
4
1
1
5
4
12
23
4
24
7
4
1
«;
4
q
23
4
24
7
4
1
1
«;
4
0
12
23
4
24
20
15
FLO* DAY
o.o
o.o
n.o
o.o
o.o
8.948
4.361
2.605
6.909
3.681
4.502
0.0
0.0
0.0
0.0
0.0
0.0
0.0
FLO* DAY
0.0
8.495
FLOW
20
15
0.0
0.0
0.0
0.0
0.0
0.0
0.001
0.003
0.003
0.0 20
0.0 15
0.0
0.003
0.0
0.0
0.0
0.0
n.o
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
20
15
0.0
0.0
0.0
0.0
-------
LAKE COPE 350?
TRIBUTARY FLOto INFORMATION FOR NE* MEXICO
CONCHAS RESEMVOI*
12/16/7A
MEAN MONTHLY FLO*S AND DAILY FLO*S(C«S>
TRIBUTARY MONTH YEAR MEAN FLON DAY
3503F1
3503ZZ
12
1
2
3
4
5
6
7
8
9
10
11
12
1
2
3
4
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
FLO" DAY
FLOW DAY
FLO*.
0.0
0.0
n.o
0.0
0.0
0.0
0.0
0.001
0.003
0.0
0.0
0.0
0.002
0.003
0.006
0.003
0.003
0.026
0.0
0.368
0.821
0.004
0.0
0.0
7
4
1
1
q
4
12
23
4
24
0.0
0.0
0.0
0.0
0.0 20 0.0
0.0 15 0.0
0.0
0.0
0.0
0.0
-------
APPENDIX C
PHYSICAL AND CHEMICAL DATA
-------
STOPET RETRIEVAL OATE 76/13/16
NATL EUTROPrUC'flTIONi SURVEY
EPA-L&S
350301
35 24 0900 104 11 30.0 3
CONCHAS RESEHVOI3
35047 NtS MEXICO
11EPALES 760109 04001002
0069 FEET DEPTH CLASS 00
DATE
TO
75/05/01
75/08/21
75/10/02
00010
TIME DEPTH «ATEH
OF TEMP
DAY FEET
14
14
14
14
14
13
13
13
13
13
17
17
17
17
17
25
25
25
25
25
00
00
00
00
00
20
20
20
20
20
0000
0005
0015
0030
0065
0000
0005
0020
003S
0057
0000
0005
0015
0030
0055
CENT
13.3
13.2
12.4
11.5
10.5
23.5
22.8
22.1
20.2
17.6
19.8
19.9
19.7
19.5
19.3
00300
00
MG/L
8.6
8.8
8.2
8.2
7.6
6.8
6.8
5.2
1.8
0.8
7.0
6.6
6.8
6.4
6.8
00300
00
MG/L
8.6
8.8
8.2
8.2
7.6
6.8
6.8
5.2
1.8
0.8
7.0
6.6
6.8
6.4
6.8
00077
TfcANSP
SECCHI
INCHES
45
44
48
00094
CNDUCTVY
FIELD
MICROMHO
690
668
673
665
656
1044
1033
inn
983
937
757
754
750
751
00400
PH
su
8.40
8.30
8.20
8.40
8.40
8.20
8.30
8.20
7.90
7.80
8.30
8.30
8.30
8.25
8.25
00410
T ALK
CAC03
MG/L
160
162
161
161
162
150
150
151
156
171
152
153
152
149
149
00610
NH3-N
TOTAL
MG/L
0.020
0.020K
0.020
0.020
0.050
0.020K
0.020K
0.020K
0.060
0.140
0.020
0.020
0.020
0.020
0.020K
00625
TOT KJEL
N
MG/L
0.400
0.400
0.400
0.400
0.400
0.300
0.300
0.400
.0.400
0.500
0.400
0.400
0.400
0.400
0.600
00630
N02&N03
N-TOTAL
MG/L
0.020K
0.020K
0.020K
0.020K
0.030
0.020K
0.020*
0.020K
0.020K
0.020K
0.020K
0.020K
0.020K
0.020K
0.020K
00671
PHOS-OIS
ORTHO
MG/L P
0.004
0.004
0.004
0.003
0.003
0.004
0.005
0.003
0.007
0.021
0.003
0.002
0.002
0.00?
0.003
DATE
FROM
TO
75/05/01
75/08/21
75/10/02
TIME
OF
DAY
14 25
14 25
14 25
14 25
14 25
13 00
13 00
13 00
13 00
13 00
17 20
17 20
17 20
17 20
17 20
DEPTH
FEET
0000
0005
0015
0030
0065
0000
0005
0020
0035
0057
0000
0005
0015
0030
0055
00665
PHOS-TOT
MG/L P
0.012
0.015
0.018
0.013
0.015
0.022
0.024
0.022
0.026
0.040
0.018
0.017
0.019
0.026
0.035
32217 00031
CHLRPHYL INCDT LT
A RFMNING
UG/L PERCENT
1.3
3.9
2.7
K VALUE KNOWN TO BE LESS
THAN INDICATED
-------
*ATL EUTRCPHlCATION SURVEY
EPft-LAS VEGAS
35 27 47.0 104 12 33.0 3
CONCHAS RESERVOIR
35047 NE« fEXICO
/TYPA/AMbNT/LAKE
11EPALES 760109 04001002
0054 FEET DEPTH CLASS 00
DATE
FPQM
TO
75/05/01
75/08/21
75/10/02
00010
TIME DEPTH irfATEP
OF TEMP
DAY FEET
14
14
14
14
14
13
13
13
13
16
16
16
16
55
55
55
55
55
40
40
40
40
35
35
35
35
0000
0005
0015
0030
0050
0000
0005
0020
0043
0000
0005
0015
0036
CENT
13.8
13.3
12.9
12.5
11.6
24.1
23.7
23.3
18.4
20.0
19.8
19.6
19.3
00300 00077 00094
DO TRANSP CNOUCTVY
SECCHI FIELD
MG/L INCHES MICROMHO
9.2
8.4
8.2
8.2
7.2
7.4
7.2
5.8
1.2
6.6
5.8
6.0
5.6
61 730
730
730
727
685
60 981
967
924
685
42 720
717
723
712
00400 00410
PH T ALK
CAC03
SU
8.40
8.30
8.40
8.10
8.30
8.20
8.35
8.20
7.95
8.30
8.20
8.20
8.25
MG/L
166
163
167
164
165
147
149
145
131
146
147
149
ISO
00610 00625 00630 00671
NH3-N TOT KJEL N02&N03 PHOS-DIS
TOTAL N N-TOTAL ORTHO
MG/L
0.030
0.030
0.030
0.040
0.060
0.020K
0.030
0.030
0.090
0.030
0.030
0.030
0.030
MG/L
0.300
0.400
0.400
0.400
0.300
0.300
0.300
0.300
0.400
0.300
0.400
0.400
0.400
M6/L
0.020K
0.020K
0.020K
0.020K
0.040
0.020K
0.020K
0.020K
0.100
0.030
0.030
0.030
0.030
MG/L P
0.011
0.012
0.011
0.019
0.019
0.007
0.004
0.006
0.006
0.002
0.002
0.00?K
0.003
DATE
FROM
TO
75/05/01
75/08/21
75/10/02
00665 32217 00031
TIME DEPTH PHOS-TOT CHLRPHYL INCDT LT
OF A RFMNING
DAY FEET
14
14
14
14
14
13
13
13
13
16
16
16
16
55
55
55
55
55
40
40
40
40
35
35
35
35
0000
0005
0015
0030
0050
0000
0005
0020
0043
0000
0005
0015
0036
MG/L P
0.011
0.013
0.015
0.019
0.036
0.023
0.024
0.025
0.044
0.020
0.019
0.018
0.020
UG/L PERCENT
0.9
5.0
3.0
K VALUE KNOWN TO BE LESS
THAN INDICATED
-------
STO«ET RETRIEVAL DATE 76/12/16
NATL EUTRCPMICATION SURVEY
EPA-LAS VEGAS
350303
35 35 26.0 104 11 43,0 3
CONCHAS RESERVOIR
35047 NEW MEXICO
/TYPA/AMBNT/LAKE
11EPALES 760109 0*001002
0065 FEET DEPTH CLASS 00
DATE
TO
75/05/01
75/08/21
75/10/02
TIME C
OF
00010
)E»T(- HATER
TEMP
DAY FEET
15
15
IS
15
15
13
13
13
13
13
16
16
16
16
16
50
50
SO
50
50
15
15
15
15
15
55
55
55
55
55
0000
0005
0015
0030
0061
0000
0005
0015
0026
0053
0000
0005
0015
0030
0050
CENT
13
13
12
12
11
23
23
23
21
17
19
19
19
19
19
.1
.0
.3
.0
.1
.5
.4
.1
.4
.3
.7
.8
.6
.7
.4
00300
00
MG/L
9
8
8
9
7
6
6
6
2
0
6
6
6
6
5
.2
.6
.8
.0
.2
.6
.8
.4
.6
.6
.4
.4
.0
.0
.8
00300
00
MG/L
9.2
8.6
8.8
9.0
7.2
6.6
6.8
6.4
2.6
0.6
6.4
6.4
6.0
6.0
5.8
00077
TRANSP
-------
SURVEY
tPA-|_aS VEGAS
35 33 1000 104 1£ 37.0
CONCHAS RESERVOIR
35047 NEfe MEXICO
/TYPA/AMBNT/LAKE
11EPALES 760109 04001008
0044 FEET DEPTH CLASS 00
DATE
FROM
TO
75/05/01
75/08/21
75/10/02
00010
TIME DEPTH »ATER
OF TEMP
DAY FEET
16
16
16
16
12
12
12
12
12
16
16
16
16
16
20
20
20
20
30
30
30
30
30
00
00
00
00
00
0000
0005
0015
0041
0000
0005
0015
0030
0045
0000
0005
0015
0030
0044
CENT
12
12
12
12
22
21
21
19
18
19
19
19
19
19
.4
.3
.3
.1
.3
.9
.6
.4
.3
.7
.7
.7
.5
.1
00300
DO
MG/L
8.8
8.8
8.6
8.5
7.6
7.4
6.2
2.0
1.0
7.2
7.2
7.2
7.2
7.0
00077
THANSP
«;ECCHI
INCHES
35
44
30
00094
CNDUCTVY
FIELD
MICROMHO
672
672
672
678
1014
1007
1000
934
948
769
770
765
757
752
00400
PM
SU
8.40
8.40
8.20
8.30
8.30
8.40
8.30
7.95
8.40
8.30
8.35
8.35
8.30
8.30
00410
T ALK
CAC03
MG/L
162
164
163
161
146
145
146
150
156
149
149
143
147
149
00610
NH3-N
TOTAL
MG/L
0.030
0.020
0.020K
0.040
0.020K
0.020K
0.020K
0.030
0.020K
0.020K
0.020K
0.020K
0.020K
0.020K
00625
TOT KJEL
N
MG/L
0.300
0.200K
0.200K
0.600
0.300
0.300
0.300
0.300
0.300
0.200
0.200
0.400
0.300
0.300
00630
N02&N03
N-TOTAL
MG/L
0.050
0.020K
0.020K
0.030
0.020K
0.020K
0.020K
0.030
0.020K
0.020K
0.020K
0.020K
0.020K
0.020K
00671
PHOS-OIS
ORTHO
MG/L P
0.013
0.005
0.004
0.006
0.01?
0.004
0.005
0.006
0.00V
0.002
0.00 elf
0.003
O.OOir
o.oo-
DATE
FROM
TO
75/05/01
75/08/21
75/10/02
00665 32217 00031
TIME DEPTH PHOS-TOT CHLRPHYL INCDT LT
OF A REMNING
DAY FEET
16
16
16
16
12
12
12
12
12
16
16
16
16
16
20
20
20
20
30
30
30
30
30
00
00
00
00
00
0000
0005
0015
0041
0000
0005
0015
0030
0045
0000
0005
0015
0030
0044
MG/L P
0
0
0
0
0
0
0
0
0
0
0
0
0
0
.016
.018
.034
.187
.040
.032
.027
.031
.032
.019
.022
.022
.020
.037
UG/L PERCENT
2.5
8.9
3.8
K VALUE KNOWN TO BE LESS
THAN INDICATED
-------
APPENDIX 0
TRIBUTARY AND WASTEWATER
TREATMENT PLANT DATA
-------
STOPET RETRIEVAL
NflTL EUTROPHJC
EPA- LAS VEGAS
76/12/16
DATE TIME DEPTH N028.N03
FROM OF
TO DAY FEET
74/12/07
75/01/0*
75/02/01
75/03/01
75/04/05
75/04/20
75/05/04
75/05/15
75/06/09
75/07/12
75/08/23
75/09/13
75/10/04
75/11/24
10
09
10
10
10
09
09
09
11
09
07
10
10
14
00
40
00
05
10
15
15
35
25
45
55
05
15
30
3503&1
35 2* 10oO 104 11 20.0 4
CflWADIAN RIVER
35 7.5 CONCHAS DAM
0/CONCHAS RESE8VOIH 101291
QNK 50 FT N END ORT RO .6 M N KT 139 JCT
HEPALES 2111204
0000 FEET DEPTH CLASS 00
0630
8.N03
OTAL
G/L
0.024
0.024
0.024
0.020
0.010
0.020
0.025
0.015
0.025
0.0?5
0.005
0.005
0.020
0.022
00625
TOT KJEL
N
MG/L
0.700
1.250
0.700
0.250
1.400
0.600
1.000
0.600
0.400
1.550
0.925
2.200
0.800
0.400
00610
MH3-N
TOTAL
MG/L
0.075
0.056
0.064
0.040
0.067
0.075
0.108
0.065
0.075
0.065
0.195
0.160
0.090
0.050
00671
PhOS-DIS
ORTMO
MG/L P
0.005K
0.005K
0.005
0.005
0.005K
0.005K
0.005
0.005K
0.005K
0.005
0.005
0.065
0.005
0.005K
00665
PHOS-TOT
MG/L P
0.010
0.020
0.015
0.020
0.030
0.010K
0.020
0.020
0.010K
0.010
0.065
0.040
0.020
K VALUE KNOWN TO BE LESS
THAN INDICATED
-------
STORET RETRIEVAL QATE 76/13/16
NATL EUTROPrtlCATICN SURVEY
EPS- tA5 VEGAS
DATE TIME DEPTH N026.N03
FPOM OF
TO DAY FEET
74/12/07
75/02/01
75/03/01
75/04/05
75/04/20
75/05/04
75/05/15
75/06/09
75/07/12
75/08/23
75/10/04
14
13
12
13
14
14
14
13
12
14
25
00
30
00
20
20
10
50
20
00
3503A2
25 39 20.0 10* 25 35.0 4
CANADIAN RIVER
35 SAN MIGUEL CO MP
T/CONCHAS RESERVOIR 101291
RT 65 BROG S MI SSE OF SABINOSO
11EPALES 211120*
0000 FEET DEPTH CLASS 00
0630
6.N03
OTAL
G/L
0.008
0.008
0.005
0.005
0.005
0.010
0.005
0.010
0.025
0.005
0.010
006?5
TOT KJEL
N
MG/L
1.500
0.300
0.650
0.700
0.850
0.450
0.375
1.100
2.200
0.600
0.500
00610
NM3-N
TOTAL
MG/L
0.030
0.008K
0.025
0.020
0.020
0.020
0.010
0.015
0.025
0.010
0.010
00671
PHOS-DIS
03THO
MG/L P
0.005K
0.005K
0.010
0.005K
0.010
0.010
0.005K
0.005K
0.015
0.010
0.010
00665
PHOS-TOT
MG/L P
0.020
0.025
0.055
0.060
0.090
0.090
0.080
0.090
0.160
0.160
0.090
K VALUE KNOWN TO BE LESS
THAN INDICATED
-------
STOPET RETRIEVAL DATE 76/12/16
NATL EUT^OPnlCATION SURVEY
EPA- l_AS VEGAS
DATE TIME DEPTH
FROM OF
TO DAY FEET
74/12/07
75/01/04
75/02/01
75/03/01
75/04/05
75/04/20
75/05/04
75/05/15
75/06/09
75/07/12
75/08/23
75/09/13
75/10/04
10
09
09
10
10
09
09
09
11
09
09
09
10
25
30
50
00
00
00
00
45
00
00
45
45
00
3503B1
35 22 50.0 10* 10 58.0
CONCHAS CANAL
35 7.5 CONCHAS 0AM
0/CONCHAS RESERVOIR
flNK E OF TUNNEL ON RD .7 MJ
11EPALES 2111204
0000 FEET DEPTH CLASS 00
RT 129 JCT
0630
J>N03
OTAL
>G/L
0.032
0.040
0.032
0.035
0.025
0.005
0.005
0.005
0.005
0.020
0.005
0.025
0.010
00625
TOT KjEL
N
MG/L
0.900
1.330
1.000
0.300
0.550
0.350
0.300
0.250
0.300
1.150
0.850
0.650
0.700
00610
NH3-N
TOTAL
MG/L
0.025
0.040
0.016
0.020
0.030
0.015
0.015
0.010
0.020
0.010
0.010
0.030
0.015
00671
PHOS-DIS
ORTHO
MG/L P
0.005K
0.010
0.005K
0.005
0.005
0.005K
0.005K
0.005K
0.005
0.005
0.005K
0.005
0.010
00665
OHOS-TOT
MG/L P
0.010
0.010
0.010
0.010
0.030
0.010K
0.010K
0.010
0.010
0.020
0.030
0.027
0.040
K VALUE KNOWN TO BE LESS
THAN INDICATED
-------
EUTROPHICATION
EPA- LAS VEGAS
00630
DATE TIME DEPTH N03s>N03
FROM OF N-TOTAL
TO DAY FEET MG/L
3S03CI
35 18 00.0 104 18 45.0 4
CUERVO CREEK
35 SAN MIGUEL co MP
T/CONCHAS RESEHVOIR 101391
*T 139 9ROG 1* Ml SE OF VARIADERO
11EPALES 3111304
0000 FEET DEPTH CLASS 00
00625
TOT KJEL
N
MG/L
00610
NH3-N
TOTAL
MG/L
00671
PHOS-OIS
ORTHO
MG/L P
00665
PHOS-TOT
MG/L P
75/07/13 10 30
0.840
0.030
0.100
-------
STO»ET RETRIEVAL DATE 76/13/16
NATL tUTROPnICATION SUPvEY
- LAS VEGAS
DATE TIME DEPTH N025.N03
FROM OF
TO DAY FEET
74/12/07 12 00
75/01/04 11 00
75/03/01 11 00
75/04/20 12 00
75/05/04 12 00
75/08/23 12 00
350301
35 23 30.0 104 20 15.0 4
CONCHAS RIVE*
35 SAN MIGUEL co MP
T/CO^CHAS RESERVOIR 101291
LOW WTR FORD ON RNCH RO 6 M N HWY 104 JT
11EPALES 2111204
0000 FEET DEPTH CLASS 00
0630
5.N03
OTAL
fi/L
0.003
0.008
0.005
0.005
0.005
0.010
00625
TOT KJEL
N
MG/L
1.100
1.300
0.100
0.500
0.550
1.250
00610
NH3-N
TOTAL
MG/L
0.025
0.028
0.020
0.010
0.015
0.020
00671
PHOS-DIS
ORTHO
MG/L P
0.010
0.005
0.005
0.005K
0.005K
0.040
00665
OHOS-TOT
MG/L P
0.010
0.010K
0.010K
0.010
0.010K
K VALUE KNOWN TO BE LESS
THAN INDICATED
-------
STORE7 RETRIEVAL
NATL EUTRCPHICAT10*
EPA- LAS VEG4S
7S/X2/16
00630
DATE TIME DEPT" N02&N03
FROM OF N-TOTAL
TO DAY FEET KG/L
3503E1
35 24 SC.O i,:>4. 23 4!J.O *
TREkEMTINfi CRE^X
35 S&N MIGUEL CO HP
T/CONCHAS RKSERVOIR 10129J
BNK T HI SE OF TREVENTINA
11EPALES 211120*
0000 FEET DEPTH CLASS 00
00&2S
TOT KJEL
N
«G/L
00610
NM3-N
TOTAL
MG/L
00671
PHOS-DIS
ORThO
MG/L P
00665
PHOS-TOT
MG/L P
75/07/12 11 20
0.240
1.780
0.042
0.012
0.420
-------
APPENDIX E
PARAMETRIC RANKINGS OF LAKES
SAMPLED BY NES IN 1975
STATE OF NEW MEXICO
Mean or median values for six of the key parameters evaluated
in establishing the trophic conditions of New Mexico lakes sampled
are presented to allow direct comparison of the ranking, by parameter;
of each lake relative to the others. Median total phosphorusD
median inorganic nitrogen and median dissolved orthophosphorus
levels are expressed in mg/1. Chlorophyll a_ 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
0812 NAVAJO RESERVOIR
3501 ALAMOGORGO
3502 BLUE WATER LAKE
3503 CONCHAS RESERVOIR
3504 EAGLE NEST LAKE
3505 ELEPHANT BUTTE RESERVOIR
3506 EL VADO RESERVOIR
3507 LAKE MACMILLAN
3509 UTE RESERVOIR
MEDIAN
TOTAL P
0.025
0.025
0.036
0.020
0.181
0.083
0.034
0.097
0.021
MEDIAN
INORG N
0.130
0.050
0.140
0.040
0.070
0.110
0.140
0.045
0.040
500-
MEAN SEC
420.92.8
469.667
480.125
451.833
455.750
475.750
466.444
489.778
448.750
MEAN
CHLORA
2.164
5.867
3.867
3.275
13.357
6.758
2.189
14.133
3.242
15- MEDIA*
MIN DO DISS ORTHC
11.200
10.600
11.400
14.400
14.400
14.200
12.600
10.100
13.800
0.009
0.003
0.01? '
0.004
0.132
0.052
0.014
0,00?
0.004
-------
PERCENT OF LAKES WITH HIGHER VALUES (NUMBER OF LAKES WITH HIGHER VALUES)
LAKE MEDIAN MEDIAN 500- MEAN 15- MEDIAN
CODE LAKE NAME TOTAL P I.NORG N MEAN SEC CHLORA MIN DO DISS ORTHO P
0812 NAVAJO RESERVOIR 63 (5) 25 ( 2) 100 ( 8) 100 (8) 75 ( 6) 56 ( 4)
3501 ALAMOGORDO 75 < 6) 63 C 5) 38 (3) 38 < 3) 88 ( 7) 100 ( 8)
3502 BLUE WATER LAKE 38 (3) 6(0) 13 (1) 50 ( 4) 63 ( 5) 38 (^ 3)
3503 CONCHAS RESERVOIR 100 ( 8) 94 (7) 75 ( 6) 63 ( 5) 6 ( 0) ai ( 6)
3504 EAGLE NEST LAKE 0(0) 50 ( 4) 63 ( 5) 13 ( 1) 6(0) 0(0)
3505 ELEPHANT BUTTE RESERVOIR 25 (2) sa ( 3) 25 ( 2> 25 (2) 25 ( 2) 13 ( i>
3506 EL VADO RESERVOIR 50 ( 4) 6(0) 50 ( 4) 88 (7) 50 ( 4) 25 ( 2)
3507 LAKE MACMILLAN 13 ( 1) 75 ( 6) 0 ( 0) 0 ( 0) 100 (8) 56 ( 4)
3509 UTE RESERVOIR 88 (7) 94 ( 7) 88 (7) 75 ( 6) 38 (3) 81 ( 6)
------- |