san luis rey river watershed management guideline prepared by the san luis rey watershed council...
TRANSCRIPT
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San Luis Rey RiverWatershed
Management Guideline
Prepared by the
San Luis Rey Watershed Council
October, 2001
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San Luis Rey Watershed CouncilAcknowledgements:
• Mission Resource Conservation District• Upper San Luis Rey Resource Conservation District• University of California Cooperative Extension • U.S. Environmental Protection Agency, Region 9• California Coastal Conservancy• Fallbrook Public Utilities District• USDA, Natural Resources Conservation Service
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Preface: The San Luis Rey River Watershed Management Guideline 2000 - Identifies General Considerations for the Watershed: Land Use Issues
Status of the Watershed
Recommendations for research and data collection
Recommendations for future management Educational Considerations
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San Luis Rey Watershed
Located in the Northwest Corner of San Diego County
558 Square Miles
Drains to the Pacific Ocean
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San Luis Rey WatershedBase Map
Riverside CountySan Diego County
N
CampPendleton
Oceanside
Map assembled by: Thomas ShareUSDA Natural Resources Conservation ServiceDavis, CA.
Vista
10 10 200
Data Sources:NRCS, WPS, Madalene M. Ransom, using ArcInfoSANDAG, San Diego Association of Governments
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San Luis Rey WatershedManagement Project
Major Concerns• Water Quality• Invasive Plant Species• Wildlife Habitat Condition• Floodplain Management• Sand Mining• Other Watershed Issues
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San Luis ReyManagement Project
Key Elements of the Program• Hired a Watershed Coordinator• Compiled and Reviewed Existing Information • Established a Watershed Council (1997)• Meetings Held Monthly• Prioritized Issues• Developed Watershed Management Guidelines• Beginning Implementation of Guidelines
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• Started in 1997• Focused on Development of the Watershed
Management Guideline • Council Meetings are the Fourth Monday each
Month at 1:00 p.m. - and are Open to the Public.• Meeting Location:
• Fallbrook Public Utilities District Building990 Mission Rd. Fallbrook, CA
San Luis ReyWatershed Council
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Watershed History
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• 1791- Mission San Luis Rey established in Oceanside
• 1850 - California became the 31st state• 1875 - First Reservations established:
• La Jolla and Pala Reservations - 1875• Rincon Reservation - 1881• San Pasqual and Pauma Reservations - 1891
• 1891 - Mission Indian Relief Act signed
Watershed History
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Watershed History
• 1895 - Escondido Canal completed• 1922 - Henshaw Dam completed • 1920’s - Citrus orchards and avocados irrigated
from locally developed water supplies• 1940’s - Irrigated agricultural enterprises
expanded
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Current Status of the San Luis Rey WatershedCurrent population: Approximately 150,000
Land area: 558 Square miles
Average rainfall: 11” to 40” (Ocean to Mountains)
Land use estimates: Undeveloped: 50%Agricultural: 37%Residential: 5%Parks/Recreation: 5%Water: 2%Commercial/Office <1%Military: <1%
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Generalized Land Use Map
Land UsesPublic Services / Hospital
Parks / Recreation
Agriculture
Undeveloped
Residential
Industrial / Transportation
Commercial / Office
Military
Data Source:SANDAG, San Diego Association of Governments
N
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Current Status of the San Luis Rey Watershed
San Luis Rey Watershed: 558 sq. miles
Land ownership: Private: 48%Special District: 14%Indian Reservation: 14%National Forest: 12%State: 5%Military: 5%Local Government: 2%
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Generalized Ownership Map
OwnershipCityCountyStateFreewaysMilitary
Indian ReservationNational ForestBLMPrivateSpecial District / Schools / Misc. Federal
N
Data Source:SANDAG, San Diego Association of Governments
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Projected Population Growth
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Projected Population Growth
• Areas With Greatest Projected Growth:• Fallbrook• Valley Center• Bonsall• Pala/Pauma Valley
• Areas With Less Projected Growth:• Oceanside• Vista
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Agricultural Uses
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Agricultural Uses
• High Cash Value Crops• Citrus Orchards• Avocados• Truck Crops• Flowers• Nurseries
• Land and Water is Expensive• Intensive irrigation• Steep Slopes• Marginal Soils
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Watershed Council’s Role
• Minimize the Impact of Agriculture on Water Quality in the San Luis Rey Watershed
• Use the publication titled - “Management Options for Nonpoint Source Pollution”
• Recommends solutions for minimizing ground and surface water problems resulting from agricultural operations.
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Heavy Industrial Uses
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Heavy Industrial Uses
Current Uses Within the Watershed:
• Proposed Gregory Canyon Landfill• Concerns: Location is poor, with respect to the aquifer of
the San Luis Rey River.
• Watershed Council’s Role: If constructed, the Watershed Council will
monitor river for watershed health.
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Heavy Industrial Uses
Current Uses Within the Watershed:• Rosemary’s Mountain Quarry:
• Concerns: • Inadequate environmental review• Water Quality Problems• Air Quality Problems
• Watershed Council’s Role:
If constructed, the Watershed Council will monitor for watershed health.
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Heavy Industrial Uses
Current Uses Within the Watershed:
• Sand Mining Operations• Recognized need for sand mining• One of the few good sand sources in
San Diego County • Concerns:• Beach sand replenishment Impacted• Need for a detailed study of sand mining
impacts on the San Luis Rey River• Increased erosion and scouring of riverbed,
especially during flood events
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Fire Management
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Fire Management
The Watershed Council will:
• Assist with coordination of agencies involved in
fire management in the watershed. • Conduct research on flame resistant plants
available and suitable for the watershed.• Provide maps showing fire susceptibility in the
San Luis Rey Watershed on the Watershed Council website
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Fire Susceptibility Map
ModerateHighVery High
Fire Fuel Rank
N
Map assembled by: Madalene M. RansomUSDA Natural Resources Conservation ServiceDavis, CA.
Data Source:CA Department of Forestry and Fire Protection
Sierra South Region Office
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Fire Management
The Watershed Council will assist in or provide information on:
• Causes of Wildfire• Methods of Reducing Wildfire Incidence• Development of a Fire Management Plan• Public Outreach:
• Website• Handout Materials• Presentations to community groups
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Wildlife Management
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Wildlife Management Major Issues:
• Wildlife Habitat Management and Protection• Reduction in suitable habitat • Wildlife species decline• Several species listed as threatened or
endangered
• Multiple Species Conservation Program• Provide sufficient habitat• Provide corridors and linkages• Provide mitigation easements for private
landowners
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Invasive Plant Species Management
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Invasive Plant Species Management
Exotic, Invasive Plant Species Found in the San Luis Rey River Watershed:• Arundo• Tamarisk• Pampas grass• Castor bean
Problems:• Cause Erosion and Flood Problems • Out-Competes Native Species in Riparian
Habitat
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Invasive Plant Species Programs
Eradication Efforts:• GIS mapping of invasive plant species.• Developed a Weed Management Area (WMA) to
help fund eradication efforts.• Use WMA to mitigate Native Habitat loss.• USDA Environmental Incentives Program
(EQUIP) education program:• Landowner/Manager Awareness Program• Field Visits and Community Presentations
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Flood Management
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Flood Management Historical Conditions:
Major Floods: Highest Flows (Oceanside)• 1916 95,600 cubic feet /
second• 1980 (Flow data missing)• 1993 25,700 cubic feet /
second
Current Conditions:• Much more development now present in
Watershed than in 1916.• Potential still exists for great floods.• Large portions of the Watershed are not
mapped for 100-year floodplain.
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Water Quality and Quantity
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Water Quality and Quantity
Protection of Beneficial Uses• Status:
• State Water Resources Control Board Water Quality Assessment:
• River listed as having “intermediate” water quality.• 1996 Assessment - Recreational uses in lower watershed are
threatened by coliform contamination.• The San Luis Rey River and the 1998 303(d) List:
• No Total Maximum Daily Loads (TMDL) established yet.• But - the coastal shoreline is listed as having a high coliform
count from unidentified point and nonpoint sources.• County and City of Oceanside Now Required to
Perform Water Quality Monitoring in Watershed.
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Water Quality and Quantity
Runoff Concerns From Land Uses:• Unpaved roads and Burn areas can be sources of:
• High levels of erosion• Accompanying sediment
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Water Quality and Quantity Agriculture:
• Runoff from Dairies and Grazing land, if improperly managed, may contribute:
• Nutrients• Fecal coliforms• Seepage or runoff contaminated with the above into ground
and/or surface water bodies.
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Run off from urban streets may contain:• Bacteria• Oil / Phenols• Nitrogen / Phospates• Suspended solids• First Hour of moderate to heavy storm - Contributes more
pollution than most city sewer systems during same time period.
Water Quality and Quantity
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Water Quality and QuantityConclusion:
Water Quality Beneficial Uses are not currently significantly impaired.
Possible exception - Fecal Coliform Bacteria
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Water Quality and QuantityGuideline to Address This Issue:
All land uses potentially contributing contamination to the San Luis Rey River Watershed can implement conservation practices to reduce pollution.
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Recreational and Open Space Management
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Recreational and Open Space Management
There are many plans and jurisdictions that will influence open space management now
and in the future.
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Recreational and Open Space Management
There is considerable public land ownership in the Watershed
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Recreational and Open Space Management
• Recreational Uses• Parks• Camping• Fishing• Swimming
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Recommendations On Parks:• Support Recreational Activities at Current
Public Locations.• Promote use of Best Management Practices
(BMP’s) to reduce water quality problems.
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Fishing Opportunities:
• Provide greater fishing opportunities by building:
•Docks•Piers•Other Facilities
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Educational Opportunities
Develop Educational Materials and Workshops for Adults and Youth:
Adult Programs:• Watershed Owners Manual • Invasive Plant Identification and Removal• Integrated Pest Management• Water Quality for Homeowners
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Educational Opportunities
Youth Programs:
• History of San Luis Rey River Watershed• Agricultural Literacy
• Information and Hands-on Experience inAgricultural Production
• Water Quality Programs• Water Sampling and Analysis
• Ambient Stream Bioassesment
• Watershed Management
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Wetland Restoration and Enhancement
Goals:• Provide new or restored wetland habitat.• Increase wetland species diversity.• Allow for better water filtration.• Improve water quality.• Assist landowners with restoration projects.
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Recommendations for Wetland Enhancement Projects
• Restore Wetlands near sand mining operations in the eastern watershed.
• Restore Other riparian areas in the San Luis Rey River and its tributaries.
• Eliminate Invasive species throughout the Watershed.
• Pursue Partnerships and grant funding to accomplish these goals.
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Recommendations for Wetland Enhancement Projects
Restore riparian areas and wetlands in San Luis Rey River and its tributaries:
• Ostrich Farm Creek, near Bonsall• San Luis Rey River, near the coast• Wilderness Gardens Preserve
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In Conclusion
Additional Issues that will need to be addressed:
• Future Transportation Impacts on Watershed - more Roads and Traffic?
• Impacts of Increasing Urbanization - more Homes?
• Casino / Recreational Development on Tribal Lands?
• Endangered Species Habitat Protection - Fair Compensation for landowners?
• Need to Review and Update the Watershed Management Guideline on a regular basis.