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San Luis Rey River Watershed Management Guideline. Prepared by the San Luis Rey Watershed Council October, 2001. San Luis Rey Watershed Council Acknowledgements:. Mission Resource Conservation District Upper San Luis Rey Resource Conservation District

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san luis rey river watershed management guideline

San Luis Rey RiverWatershed Management Guideline

Prepared by the

San Luis Rey Watershed Council

October, 2001

san luis rey watershed council acknowledgements
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
preface
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
san luis rey watershed
San Luis Rey Watershed

Located in the Northwest Corner of San Diego County

  • 558 Square Miles
  • Drains to the Pacific Ocean
slide5

San Luis Rey Watershed

Base Map

N

Riverside County

San Diego County

Camp

Pendleton

Vista

Oceanside

0

10

10

20

Map assembled by: Thomas Share

USDA Natural Resources Conservation Service

Davis, CA.

Data Sources:

NRCS, WPS, Madalene M. Ransom, using ArcInfo

SANDAG, San Diego Association of Governments

san luis rey watershed management project
San Luis Rey WatershedManagement Project

Major Concerns

  • Water Quality
  • Invasive Plant Species
  • Wildlife Habitat Condition
  • Floodplain Management
  • Sand Mining
  • Other Watershed Issues
san luis rey management project
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
san luis rey watershed council
San Luis ReyWatershed Council
  • 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
watershed history10
Watershed History
  • 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 history11
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
current status of the san luis rey watershed
Current Status of the San Luis Rey Watershed

Current 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%

slide13

Land Uses

Residential

Industrial / Transportation

Commercial / Office

Military

Public Services / Hospital

Parks / Recreation

Agriculture

Undeveloped

Generalized Land Use Map

N

Data Source:

SANDAG, San Diego Association of Governments

current status of the san luis rey watershed14
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%

slide15

Generalized Ownership Map

N

Ownership

City

County

State

Freeways

Military

Indian Reservation

National Forest

BLM

Private

Special District / Schools / Misc. Federal

Data Source:

SANDAG, San Diego Association of Governments

projected population growth17
Projected Population Growth
  • Areas With Greatest Projected Growth:
    • Fallbrook
    • Valley Center
    • Bonsall
    • Pala/Pauma Valley
  • Areas With Less Projected Growth:
    • Oceanside
    • Vista
agricultural uses19
Agricultural Uses
  • High Cash Value Crops
    • Citrus Orchards
    • Avocados
    • Truck Crops
    • Flowers
    • Nurseries
  • Land and Water is Expensive
    • Intensive irrigation
    • Steep Slopes
    • Marginal Soils
watershed council s role
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.
heavy industrial uses22
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.

heavy industrial uses23
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.

heavy industrial uses24
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
fire management26
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
slide27

Fire Fuel Rank

Moderate

High

Very High

Fire Susceptibility Map

N

Map assembled by: Madalene M. Ransom

USDA Natural Resources Conservation Service

Davis, CA.

Data Source:

CA Department of Forestry and Fire Protection

Sierra South Region Office

fire management28
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
wildlife management30
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
invasive plant species management32
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
invasive plant species programs
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
flood management35
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.
water quality and quantity37
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.
water quality and quantity38
Water Quality and Quantity

Runoff Concerns From Land Uses:

  • Unpaved roads and Burn areas can be sources of:
    • High levels of erosion
    • Accompanying sediment
water quality and quantity39
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.
water quality and quantity40
Water Quality and Quantity

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 quantity41
Water Quality and Quantity

Conclusion:

Water Quality Beneficial Uses are not currently significantly impaired.

Possible exception - Fecal Coliform Bacteria

water quality and quantity42
Water Quality and Quantity

Guideline to Address This Issue:

All land uses potentially contributing contamination to the San Luis Rey River Watershed can implement conservation practices to reduce pollution.

recreational and open space management44
Recreational and Open Space Management

There are many plans and jurisdictions that will influence open space management now and in the future.

recreational and open space management45
Recreational and Open Space Management

There is considerable public land ownership in the Watershed

recreational and open space management46
Recreational and Open Space Management
  • Recreational Uses
    • Parks
    • Camping
    • Fishing
    • Swimming
slide47
Recommendations On Parks:
  • Support Recreational Activities at Current Public Locations.
  • Promote use of Best Management Practices (BMP’s) to reduce water quality problems.
fishing opportunities
Fishing Opportunities:
  • Provide greater fishing opportunities by building:
  • Docks
  • Piers
  • Other Facilities
educational opportunities
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
educational opportunities50
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
wetland restoration and enhancement
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.
recommendations for wetland enhancement projects
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.
recommendations for wetland enhancement projects53
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
in conclusion
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.