Appendix A Santa Margarita River Watershed Setup Model

Appendix A
Santa Margarita River Watershed

Setup Model

Appendix A
Santa Margarita River Watershed
Setup Model

A.1 WARMF Overview

WARMF stands for Watershed Analysis Risk Management Framework, which is a
decision support system (DSS), designed for a watershed approach and TMDL
calculation. WARMF contains engineering, data, knowledge, consensus, and TMDL
modules. The consensus and TMDL modules provide road maps to engage
stakeholders in building consensus on a watershed management or TMDL plan. The
engineering and data modules furnish scientific information to each step of the road
map in a graphical and tabular format understandable to stakeholders. This section
discusses default WARMF Model inputs and site-specific data that were imported
into the WARMF Model to create the specific WARMF application to the Santa
Margarita River Watershed Model (SMRWM).

A.2 WARMF Model Inputs

The following analyses and data were incorporated into the WARMF Model:

„ Watershed delineation
„ Land use
„ Precipitation
„ Atmospheric deposition

Each of these items is critical to the application of WARMF to the Santa Margarita
River Watershed. The source of each dataset is discussed in the following subsection.

A.2.1 Watershed Delineation

The SMRWM Model was delineated into 254 sub-catchments, 251 river segments, and
three reservoirs. Digital elevation models were processed to determine the locations
of river segments and their drainage areas. The area, width, aspect, and slope of
catchments and length and slope of river segments have been calculated. The three
lakes modeled are Skinner Lake, Vail Lake, and O'Neill Lake. Because these
reservoirs are operated for water supply and not for flood control, traditional
reservoir modeling techniques will not be utilized. Information regarding reservoir
controls is presented in Appendix B. East Side Reservoir (Diamond Valley Lake) and
smaller impoundments will be included as hydraulic returns or tributaries as
necessary.

A.2.2 Land Use

Existing and future land use was derived from three sources: San Diego County,
EMWD, and data used in the EPA Better Assessment Science Integrating Point and
Nonpoint Sources (BASINS) model. Data from San Diego is reflective of 2000 land

A A-1

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Appendix A
Santa Margarita River Watershed

WARMF Model

use and data from EMWD represents 1999 data. The BASINS dataset is reflective of
land use patterns from the mid 1970s to mid 1980s (Anderson 1976). For future land
use, San Diego's and EMWD's data is reflective of year 2020 land uses. Figures A-1
and A-2 show existing and future land use for the SMR watershed. The land use
category specified by each land use source is shown on these figures. The percentage
in front of each category represents the amount of this land use category by agency.

Figures A-1 and A-2 show the differences in how entities categorize land use data.
For the purposes of the SMRWM, a common set of land use codes was derived based
on the definitions available for each land use category. These definitions are
contained in Appendix C. Table A-1 shows the selected categories for the SMR
watershed and the percentage of each land use type in the watershed for current and
future land use projections.

Table A-1 Land Use Types for SMRWM and Percentages in Watershed

Land Use Category Percent of Watershed for Percent of Watershed for
Current Land Use (%) Future Land Use (%)
10.0
Commercial/Industrial 8.5 0.6
15.2
Transportation, Communication, Utilities 0.7 7.4
4.1
Very Low Density Residential 0.6 7.1
49.4
Low Density Residential 2.3 0.8
0.1
Medium Density Residential 2.1 0.8
2.8
High Density Residential 0.2 0.1
0.1
Non-Irrigated Open Space 69.0 1.9

Irrigated Open Space 0.5

Non-Irrigated Cropland 2.1

Irrigated Cropland 8.0

Orchards & Vineyards 3.3

Dairy/Livestock 0.2

Other Agricultural 0.6

Water 1.9

A.2.3 Meteorology

Meteorological data includes daily precipitation, minimum temperature, maximum
temperature, cloud cover, dew point temperature, air pressure, and wind speed. The
model is extremely sensitive to the first three. The other four are used primarily for
performing the heat balance in lakes, but dew point is also used to calculate
evapotranspiration.

Data from seven weather stations was imported and linked to specific sub-
catchments. Those stations are Anza, Camp Pendleton, Oak Grove Ranger Station,
Oceanside Marina, Sun City, Temecula, Palomar Range and Vista. The daily
precipitation and daily minimum, average, and maximum air temperature were
derived from the National Climatic Data Center (NCDC) Summary of the Day
database for Cooperative Stations. The other four parameters were obtained from the

A A-2

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Appendix A
Santa Margarita River Watershed

WARMF Model

NCDC Global Summary of the Day and Surface Airways databases, but data from
those databases were only available for the Camp Pendleton station.

A.2.4 Atmospheric Deposition

Two atmospheric deposition data sources were evaluated for incorporation into the
SMRWM: the National Atmospheric Deposition Program (NADP) and Clean Air
Status Trends Network (CASTNET). The NADP measures rain concentrations of the
major cations and anions in a national network. The CASTNET includes data and
model estimates of atmospheric concentrations and dry deposition of the major
cations and anions. The nearest NADP station to the SMR watershed is Tanbark Flat
in the San Gabriel Mountains on the north side of the Los Angeles basin. The nearest
CASTNET station is at Joshua Tree National Park in the Mojave Desert.

The Tanbark Flat station is located in Los Angeles County, California at elevation
853 meters (m) (2,798 feet [ft]) and has been operating from January 12, 1982. This site
is most appropriate for use in the SMR WARMF model as it has the influence of an
urban setting. Because of its higher elevation, it may not be the most conservative
estimate of an urban setting however. Alternatives to the Tanbark Flat station include
the site at Joshua Tree and at Palomar Range. The period of record for the Joshua tree
site is from September 2000 until present. The Palomar Range site has an elevation of
4,450 feet and period of record of 1983-1988. The short period of record for both of
these alternative stations and the absence of phosphorus data at these stations, further
supports the Tanbark Flat station as the most appropriate for inclusion into the SMR
WARMF model at this time.

A.3 Historical Data within the Santa Margarita
Watershed

Historical data within the SMR watershed was used for the SMRWM calibration. The
U.S. Geological Survey (USGS) has collected historical flow data on the watershed
and the SMR Study Partners have collected water quality data. The remainder of this
section describes the locations of these data sets and a brief data summary.

A.3.1 Water Quality and Flow Data Locations

Figures A-3 and A-4 show the locations of historic flow and water quality stations
within the SMR watershed. Table A-2 provides a station key for the historic flow
stations and also presents the period of record for each gage. Table A-3 provides a
station key for the historic water quality stations and also presents which entity
collected the historic data.

A A-3

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Appendix A
Santa Margarita River Watershed

WARMF Model

Table A-2 USGS Gages in the Santa Margarita River Watershed

Site Period of Record
Number
Site Name From To

11042400 TEMECULA C NR AGUANGA CA 8/1/1957 PRESENT

11042490 WILSON C AB VAIL LK NR RADEC CA 10/1/1989 9/30/1994

11042520 TEMECULA C A NIGGER CYN NR TEMECULA CA 2/1/1923 9/30/1948

11042600 TEMECULA C BL VAIL DAM CA 10/1/1977 9/30/1978

11042631 PECHANGA C NR TEMECULA CA 10/1/1987 PRESENT

11042700 MURRIETA C A TENAJA RD NR MURRIETA CA 10/1/1997 PRESENT

11042800 WARM SPRINGS C NR MURRIETA CA 10/1/1987 PRESENT

11042900 SANTA GERTRUDIS C NR TEMECULA CA 10/1/1987 PRESENT

11043000 MURRIETA C A TEMECULA CA 10/1/1930 PRESENT

11044000 SANTA MARGARITA R NR TEMECULA CA 2/1/1923 PRESENT

11044250 RAINBOW C NR FALLBROOK CA 11/1/1989 PRESENT

11044300 SANTA MARGARITA R A FPUD SUMP NR FALLBROOK CA 10/1/1989 PRESENT

11044350 SANDIA C NR FALLBROOK CA 10/1/1989 PRESENT

11044500 SANTA MARGARITA R NR FALLBROOK,CALIF. 10/1/1924 9/30/1980

11044600 SANTA MARGARITA R TRIB NR FALLBROOK CA 10/1/1961 9/30/1965

11044800 DE LUZ C NR DE LUZ CA 10/1/1992 PRESENT

11044900 DE LUZ C NR FALLBROOK CA 10/1/1951 9/30/1990

11045000 SANTA MARGARITA R NR DE LUZ STA CA 10/1/1924 9/30/1926

11045050 SANTA MARGARITA R A USMC DIV DAM NR YSIDORA CA 2/26/1999 9/30/2001

11045300 FALLBROOK C NR FALLBROOK CA 10/1/1993 PRESENT

11045600 ONEILL LAKE OUTLET CH NR FALLBROOK CA 10/1/1998 PRESENT

11045700 ONEILL LK SPILL CH NR FALLBROOK CA 10/1/1998 PRESENT

11046000 SANTA MARGARITA R A YSIDORA CA 3/1/1923 PRESENT

11046025 PLANT 2 DISCHARGE TO POND 2 CA 10/1/1993 PRESENT

A.3.2 Water Quality and Flow Data Summary

For modeling calibration, it is important to have coincident flow data and water
quality data. Within the current SMRWM, several USGS flow gages and water
quality sampling stations share the same locations. Although these sites have water
quality data and flow data, they are not necessarily coincident during the proposed
modeling period (1989-2001). During the calibration process, stations with relevant
water quality data and coincident flow data was selected.

A major focus of the SMR Study modeling is to evaluate from a watershed
perspective, nitrogen and phosphorus concentrations and sources in the SMR. For
summary purposes, time series plots of locations with significant amounts of water
quality data were created as shown in Figures A-5 and A-6. These figures show total
nitrogen and total phosphorus data. In these figures, stations are presented from
upstream to downstream (station MC01 is Murrieta Creek near Temecula and station
SMR01 is the Santa Margarita River at the estuary). Data is collected near the estuary
is not as extensive as data collected near Temecula. Available data suggests that
concentrations of nitrogen and phosphorus generally increase from upstream to
downstream. The average concentration of total nitrogen and total phosphorus were
calculated for the water quality stations in Figures A-5 and A-6. These calculations

A A-4

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Appendix A
Santa Margarita River Watershed

WARMF Model

also suggest that concentrations of nitrogen and phosphorus increase from upstream
to downstream in the SMR watershed. Average concentrations of total nitrogen from
upstream to downstream range from 1.4 mg/L to 4.0 mg/L. For total phosphorus,
average concentrations range from 0.2 mg/L to 0.9 mg/L from upstream to
downstream. Maximum concentration of total nitrogen and total phosphorus were
observed to be 23 mg/L and 2.8 mg/L, respectively.

A.3.3 Water Quality Data Quality

Entities that collected water quality data in the watershed are presented in Table A-3.
These data are assumed to be of adequate quality for the current use in the WARMF
Model. The majority of this data has been collected as part of permit requirements
and thus data quality and assurance was taken into account during collection and
analysis process. No formal review of data quality assurance programs for the data
provided by study partners was conducted.

A A-5

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Table A-3 Historic Water Quality Stations in the Santa Margarita River Watershed

NEW_ID STATION NAME CA WATER RES CA
DL01 DE LUZ C NR DE LUZ CA CONTROL BRD
DL02 DELUZ CREEK AT MCDOWELL
DL03 DELUZ CREEK AT DOS RIO RD X
MC01 MURRIETA AB TEMECULA C X
MC02 "C" STREET STORM DRAIN OUTLET @MURRIETA CRK -TE
MC03 RANCHO WAY STORM DRAIN OUTLET @MURRIETA CRK -TE X
MC04 EMPIRE CRK CHAN OUTLET @MURRIETA CRK -TEMECULA X
MC05 VIA MONTEZUMA STORM DRAIN OUTLET -TEMECULA X
MC06 TVRWF X
MC07 AVENIDA ALVARADO STORM DRAIN OUTLET @ MURRIETA
MC08 DOWNSTREAM OF SRWRF X
MC09 SRWRF
MC10 UPSTREAM OF SRWRF X
MC11 I-215 FB -MURRIETA X
MC12 MURRIETA LINE F-3 OUTLET NEAR KALMIA & WASHINGT X
MC13 CAL OAKS CHANNEL- MURRIETA LINE F
MC14 HOOVER RANCH POND -MURRIETA, CLINTONKEITHRD
MC15 WILDOMAR NPDES CHANNEL OUTLET BELOW CENTRAL AV
PC01 PECHANGA CREEK
PC02 PALA POND
SC01 SANDIA C NR FALLBROOK CA
SC02 SANDIA CREEK AT BUENOS CAMPOS
SG01 LATERAL.A OF STA.GERT.CHAN -TEMECULA
SMR01 SANTA MARGARITA RIVER AT HWY 101
SMR02 SANTA MARGARITA AT BRACKISH
SMR03 SANTA MARGARITA R AT YSIDORA
SMR04 SANTA MARGARITA R A BASILONE RD
FC01 LAKE ONEILL SOUTH END
SMR05 SANTA MARGARITA RIVER AT CAMP PENDLETON DIVERSION DAM
FC02 FALLBROOK C NR FALLBROOK CA
FC03 SMR AT DELUZ AT "FORD"
SMR06 SANTA MARGARITA RIVER AT DE LUZ ROAD
SMR07 NAVAL WEAPONS STN AT FALLBROOK CREEK
SMR08 SANTA MARGARITA R NR FALLBROOK
SMR09 SANTA MARGARITA RIVER UPSTREAM FROM RAINBOW C
RC01 RAINBOW C NR FALLBROOK CA
SMR10 SANTA MARGARITA RIVER AT WILLOW GLEN
SMR11 MWD CROSSING
SMR12 SANTA MARGARITA R A USGS GAGE 957
TC01 TEMECULA C AB MURRIETA C
TC02 TEMECULA CREEK AT OLD HWY 395
TC03 REDHAWK CHANNEL D/S OF OVERLAND DR
TC04 TEMECULA CREEK AT FLOOD CHANNEL
VL01 VAIL LAKE

A

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Appendix A
Santa Margarita River Watershed

WARMF Model

AMPP EMWD RCWD DWR METRO WATER RIVERSIDE
X X DISTRICT COUNTY
X X X
X X
X X X
X X X
X X X
X X
X X
X X X
X X X
X X
X X X
X X X
X X X
X X
X X X
X X
X X X
X X
X
X
X

X

A-6

$ Alberhill $ $ US HWY 74 $

Romoland Homeland Hemet

$ Winchester M

Elsinore $ Sedco Hills STATE HWY 79 Aguanga
STATE HWY 215
$ $ $

Lakeland Village $ Wildomar
I 15

Murrieta $
E HWY 74

COUNTY HWY R 3
$ Murrieta Hot Springs

Temecula $ STATE HWY 71

$ Fallbrook Pechanga Mission
Pa$la

Bons$all STATE HWY 76

I 15

San Luis Rey Valley Cen$ter
Jesmond D$ene
$
San Marcos
Oc$eanside Vis$ta M

A Carlsb$ad

$ LEGEND

Idyllwild Indian Reservations BIA 22.46% MILITARY TRAINING
4.12% MILITARY USE
Mountain Center $ EMWD 0.17% MOBILE HOME PARKS
Ramona 1999 0.43% MULTI-FAMILY RESIDENTIAL
0.02% NEIGHBORHOOD SHOPPING CENTERS
Cahuilla 1.37% Commercial 0.02% OFFICE-low rise
15.19% OPEN SPACE RESERVES PRESERVES
0.17% Dairy/Livestock 4.31% ORCHARDS AND VINEYARDS
0.03% OTHER HEALTH CARE
STATE HWY 74 0.47% High Density Residential 0.00% OTHER PUBLIC SERVICES
0.05% OTHER RETAIL TRADE AND STRIP C
0.51% Industrial 0.00% OTHER SCHOOLS
0.01% PARKS - ACTIVE
1.14% Irrigated Cropland 0.00% POST OFFICES
0.01% RELIGIOUS FACILITIES
10.37% Low Density Residential 0.00% SCHOOL DISTRICT OFFICES
0.57% SINGLE FAMILY RESIDENTIAL
5.17% Medium Density Residential 2.14% SPACED RURAL RESIDENTIAL
0.04% STORE-FRONT COMMERCIAL
0.24% Mobile Homes/Trailer Parks 41.80% VACANT NOT GRADED
2.50% WAREHOUSING & PUBLIC STORAGE
9.63% Non-Irrigated Cropland 0.03% WEAPONS FACILITES

10.67% Open Space EPA BASINS

5.23% Orchards & Vineyards 0.48% BARE EXPOSED ROCK
0.07% COMMERCIAL AND SERVICES
2.54% Other Agriculture/Ranches 0.03% CONFINED FEEDING OPS
15.52 % CROPLAND AND PASTURE
2.07% Public Infrastructure 0.26% DECIDUOUS FOREST LAND
3.19% EVERGREEN FOREST LAND
US HWY 371 0.74% Public Institutions 2.92% HERBACEOUS RANGELAND
0.07% INDUSTRIAL
2.08% Recreation 0.24% MIXED FOREST LAND
8.86% MIXED RANGELAND
39.06% Vacant 0.02% MXD URBAN OR BUILT-UP
1.86% ORCH,GROV,VNYRD,NURS,ORN
8.11% Water 0.20% OTHER AGRICULTURAL LAND
0.08% OTHER URBAN OR BUILT-UP
San Diego County 0.04% RESERVOIRS
2000 1.37% RESIDENTIAL
0.03% SANDY AREA (NON-BEACH)
0.00% AIRSTRIPS 63.36% SHRUB & BRUSH RANGELAND
0.01% STRIP MINES
0.01% BEACH - ACTIVE 0.01% TRANS, COMM, UTIL
1.36% TRANSITIONAL AREAS
0.01% CEMETERY

0.00% CENTRE CITY PARKING LOTS

0.12% COMMUNICATIONS AND UTILITIES

0.05% ELEMENTARY SCHOOLS

0.01% EXTRACTIVE INDUSTRY

4.01% FIELD CROPS

0.01% FIRE/POLICE STATIONS

0.29% FREEWAYS

0.00% GOV'T OFFICE/CIVIC CENTERS

0.01% HOSPITALS-GENERAL

0.00% HOTEL/MOTEL (LO-RISE)

0.73% INTENSIVE AGRICULTURE

STATE HWY 79 0.15% LAKES RESERVOIR

0.00% LIBRARIES

0.23% LIGHT INDUSTRY-GENERAL

0.08% MARINAS

Warner Springs $ 0.32% MILITARY AIRPORTS

COUNTY HWY 2 0.03% MILITARY BARRACKS

N

STATE HWY 79

Mesa Gra$nde 5 0 5 10 Miles

Figure A-1
Existing Land Use
Santa Margarita River Watershed

$ Alberhill $ $ US HWY 74 $

Romoland Homeland Hemet

$ Winchester Mountain

Elsinore $ Sedco Hills STATE HWY 79 Aguanga
STATE HWY 215
$ $ $

Lakeland Village $ Wildomar

I 15

Murrieta$
ATE HWY 74

COUNTY HWY R 3

US H
$ Murrieta Hot Springs

Temecula$ STATE HWY 71

$ Fallbrook Pechanga Mission

Pa$la

C HWY Bons$all STATE HWY 76
I 15

San Luis Rey Vis$ta Valley Cen$ter Mesa Gra
Jesmond D$ene
$ San Mar$cos
Oc$eanside

Carlsb$ad

A

LEGEND

$STATE HWY 74 Federal Land 0.44% MULTI-FAMILY RESIDENTIAL
0.02% NEIGHBORHOOD SHOPPING CENTERS
Idyllwild Indian Reservations BIA 0.02% OFFICE-low rise
7.20% OPEN SPACE RESERVES PRESERVES
n Center $ EMWD 0.56% ORCHARDS AND VINEYARDS
"Future" Unknown Year 0.03% OTHER HEALTH CARE
Ramona 0.00% OTHER PUBLIC SERVICES
5.5% Commercial 0.08% OTHER RETAIL TRADE AND STRIP C
Cahuilla 1.1% High Density Residential 0.00% OTHER SCHOOLS
1.87% Industrial 0.01% PARKS - ACTIVE
0.37% Irrigated Cropland 0.00% POST OFFICES
33.41% Low Density Residential 0.01% RELIGIOUS FACILITIES
14.27% Medium Density Residential 0.00% SCHOOL DISTRICT OFFICES
0.04% Mobile Homes/Trailer Parks 0.84% SINGLE FAMILY RESIDENTIAL
0.54% Non-Irrigated Cropland 57.52% SPACED RURAL RESIDENTIAL
20.35% Open Space 0.04% STORE-FRONT COMMERCIAL
7.38% Orchards & Vineyards 0.01% WAREHOUSING & PUBLIC STORAGE
0.23% Other Agriculture/Ranches 2.50% WEAPONS FACILITES
1.86% Public Infrastructure 0.60% PUBLIC/SEMI-PUBLIC
1.36% Public Institutions 0.68% INDIAN RESERVATIONS
3.44% Recreation
8.13% Water

HWY 371 San Diego County
STATE HWY 79 2020
EPA BASINS
0.00% AIRSTRIPS
0.48% BARE EXPOSED ROCK
0.01% BEACH - ACTIVE
0.07% COMMERCIAL AND SERVICES
0.00% CEMETERY
0.00% CENTRE CITY PARKING LOTS 0.03% CONFINED FEEDING OPS
15.52 % CROPLAND AND PASTURE
0.15% COMMUNICATIONS AND UTILITIES
0.26% DECIDUOUS FOREST LAND
0.06% ELEMENTARY SCHOOLS
3.19% EVERGREEN FOREST LAND
1.02% FIELD CROPS
2.92% HERBACEOUS RANGELAND
0.02% FIRE/POLICE STATIONS
0.07% INDUSTRIAL
0.29% FREEWAYS
0.24% MIXED FOREST LAND
0.00% GOV'T OFFICE/CIVIC CENTERS
8.86% MIXED RANGELAND
0.01% HOSPITALS-GENERAL
0.02% MXD URBAN OR BUILT-UP
0.00% HOTEL/MOTEL (LO-RISE)
1.86% ORCH,GROV,VNYRD,NURS,ORN
0.19% INTENSIVE AGRICULTURE
0.20% OTHER AGRICULTURAL LAND
0.15% LAKES RESERVOIR
0.08% OTHER URBAN OR BUILT-UP
0.00% LIBRARIES
0.04% RESERVOIRS
0.25% LIGHT INDUSTRY-GENERAL
1.37% RESIDENTIAL
0.08% MARINAS
STATE HWY 79 0.03% SANDY AREA (NON-BEACH)
0.32% MILITARY AIRPORTS
63.36% SHRUB & BRUSH RANGELAND
0.03% MILITARY BARRACKS
0.01% STRIP MINES
22.46% MILITARY TRAINING
0.01% TRANS, COMM, UTIL
4.12% MILITARY USE
Warner Springs $ 1.36% TRANSITIONAL AREAS
0.17% MOBILE HOME PARKS
COUNTY HWY 2
N

a$nde

5 0 5 10 15 Miles

Figure A-2
Future Land Use
Santa Margarita River Watershed

Alberhill

# Winchester

STATE HWY 74Elsi#nore # Sedco Hills Warm Springs Creek
#
Sandia Canyon
Lakeland Village
STATE HWY 215
Wildomar #
STATE HWY 79

RawsonCanyon
STATE HWI 15 Tucalo

Pe$T11042700# Murrieta Hot Springs Lake Skinne
MurrietaCreek
# Murrieta Santa Gertrudis Creek
De Luz Creek
T$ $T11042800 11042900

110S4a4nt3a M0a0rgar1i1ta11R00iv4e4r34000000T$$T#TeT$me1cchu1aln0ag4a2C6re3e1k 1104252
$T11044250 STATE HWY 71

11044800 $T110441610#00443#50T$T$

11044500

11101W401o5o41d050C574a0n04y0o9n$T0$T0$T#$T#$T111110014405546050030000 #Fallbrook I 15 # Pala
11046000

T$ 11046025 # Bonsall

KARI LA

Pacific # San Luis Rey
Ocean
# Valley Cen
40
# Oceanside # Vista T$ Legen
A 4 8 Miles #
Current USGS Gag
Scale Historic USGS Gag

# Cities Sa
Roads Re
Streams
Ca

# Mountain Center

lota Creek US HWY 371

er

Vail Wilson Creek Cahuilla Creek

20##L1a10k4e2T6e0m0ecuWT$lailsCor#1ene1kC0r4ee2k490 # Aguanga Tule Creek
11042400
Cot Chihuahua Creek

US HWY 79
STATE HWYk

tonwood Cr e e # Warner Springs

WY 76
nter Figure A-3
N USGS Gage Locations
nd
Santa Margarita River Watershed
ge Location
ge Locations c:/santa margarita/santamargarita/finalreportmaps_c.apr
anta Margarita Watershed 10/22/03 BA
eservoirs
amp Pendleton Boundary

# Winchester

#STATE HWY 74# Sedco Hills Warm Springs Creek

Elsinore Sandia Canyon

# STATE HWY 215

Lakeland Village STATE HWY 79

RawWildoma#r U% MC15

MC14 U%
k
Pe

Murrieta Creek

DeLuz Creek

Roblar Creek
U%#IU%M1M5MMMCCCuC11r001r28iU%e3U%U%MtaU%MCC101U%9#SGM0u1rrieStaanHtaoGt Seprtrriundgiss Lake
Cree

MC06MC07U%U%U%U%U%MMC0C405
SU%aUn%StSaRMMUM%CaRSRr0g0Ma11Mr9i0tRaC1R0U%iM2vSM3eCrMC0RT021C1U%U%10#U%1U%TTePU%CU%mC0e02cn1uchlaanTPUg%CaCU%U%T0C0C42r0e3e k
STA

DL03U% U% SC02

U%DL02 U%SC01
U% DL01 SMR08 U%

WooSdMCSaRnMy0oR5nS0U%6MU%U%RU%0F7C02 FC03U% # Fallbrook I 15 # Pala

I5 U%FC01

4 U% SMR04

A # Bonsall

SMR01U% U%SUM%RS0M2 R03 # San Luis Rey

Oceanside # Vista

0 4 8 Miles Legen

Scale U% Water Quality Sam

# Cities Sa

Roads Re

Streams Ca

# Mountain Center

wson Canyon
Wilson Creek
Tucalota Creek US HWY 371

e Skinner

Vail Cahuilla Creek

ATE HWY 71 VL01 UL% ake W ilson Creek Tule Creek
Temecula Cre
Chihuahua Creek

US HWY 79
STATE HCot# Aguanga

tonwood C reek

ek # Warner Springs

STATE HWY 76
# Valley Center Figure A-4
Historic Water Quality
nd N Sampling Locations

mpling Locations Santa Margarita River Watershed
anta Margarita Watershed
eservoirs c:/santa margarita/santamargarita/finalreportmaps_c.apr
amp Pendleton Boundary 4/25/03 BA

25

20

Total Nitrogen (mg/L) 15

10

5

0 5/15/1992 9/27/1993 2/9/1995 6/23/199
1/1/1991

A

MC01 Total Nitrogen (mg/L)
SMR17 Total Nitrogen (mg/L)
SMR06 Total Nitrogen (mg/L)
SMR02 Total Nitrogen (mg/L)
SMR01 Total Nitrogen (mg/L)

96 11/5/1997 3/20/1999 8/1/2000 12/14/2001

Figure A-5
Historical Total Nitrogen Concentrations

in Santa Margarita River Watershed

Total Phosphorus (mg/L) 6

MC01
SMR 1
5 SMR06
SMR02
SMR01

4

3

2

1

0 5/15/1992 9/27/1993 2/9/1995 6/23/199
1/1/1991

A

Total Phosphorus (mg/L)
17 Total Phosphorus (mg/L)

6 Total Phosphorus (mg/L)
2 Total Phosphorus (mg/L)
1 Total Phosphorus (mg/L)

96 11/5/1997 3/20/1999 8/1/2000 12/14/2001

Figure A-6
Historical Total Phosphorus Concentrations

in Santa Margarita River Watershed