Agua Hedionda Watershed Management Plan Copyright © 2005 Kenneth & Gabrielle Adelman. All rights reserved.

Agua Hedionda Watershed 30 square miles of land area 30 square miles of land area Cities of Carlsbad, Vista, Oceanside, and San Marcos, and unincorporated County of San Diego Cities of Carlsbad, Vista, Oceanside, and San Marcos, and unincorporated County of San Diego 37 linear miles of streams most of which are still natural or earthen bottomed channels 37 linear miles of streams most of which are still natural or earthen bottomed channels Watershed terminates at the Agua Hedionda Lagoon, an important cultural, economic and environmental resource that provides critical habitat for migratory and resident birds and fish. The lagoon serves as nursery habitat for commercially and recreationally significant coastal and resident species. Watershed terminates at the Agua Hedionda Lagoon, an important cultural, economic and environmental resource that provides critical habitat for migratory and resident birds and fish. The lagoon serves as nursery habitat for commercially and recreationally significant coastal and resident species.

Priority Watershed Issues Land Use Conversion creates more impervious cover and pollutants Land Use Conversion creates more impervious cover and pollutants Water Quality Impairment due to sedimentation, bacteria, total dissolved solids (TDS) and nutrients Water Quality Impairment due to sedimentation, bacteria, total dissolved solids (TDS) and nutrients Stream Bank Erosion Stream Bank Erosion Loss of Wetlands and Riparian Buffers Loss of Wetlands and Riparian Buffers Loss of Native Habitat Loss of Native Habitat

Scientific Basis of WMP Stakeholder input: Stakeholder input: Watershed Planning Group (WPG)  local and state governments, federal agencies, environmental organizations, and local citizens established goals and objectives and oversaw process Watershed Planning Group (WPG)  local and state governments, federal agencies, environmental organizations, and local citizens established goals and objectives and oversaw process Technical Advisory Committee (TAC) – staff from local governments helped establish assumptions for future land use conditions, comment on draft findings, screen candidate Best Management Practices (BMPs) and Low Impact Development (LID) scenarios, and provided input on candidate sites for stream restoration, BMP retrofits, and land acquisition. Technical Advisory Committee (TAC) – staff from local governments helped establish assumptions for future land use conditions, comment on draft findings, screen candidate Best Management Practices (BMPs) and Low Impact Development (LID) scenarios, and provided input on candidate sites for stream restoration, BMP retrofits, and land acquisition. Technical Analysis: Technical Analysis: Field reconnaissance and stream characterization Field reconnaissance and stream characterization Geomorphic analysis Geomorphic analysis Data review and analysis Data review and analysis Predictive watershed modeling to assess the current (2007) and future (2030) conditions in the watershed with and without management Predictive watershed modeling to assess the current (2007) and future (2030) conditions in the watershed with and without management

Management Plan Recommendations New Development Site Management (Low Impact Development techniques for the watershed, buffer policy, water conservation) New Development Site Management (Low Impact Development techniques for the watershed, buffer policy, water conservation) Preservation (Acquisition) Preservation (Acquisition) Riparian Buffer and Wetlands Restoration Riparian Buffer and Wetlands Restoration Stream Restoration Stream Restoration Stormwater BMP Retrofit Projects Stormwater BMP Retrofit Projects Monitoring Monitoring Citizen Stewardship/Public Outreach Citizen Stewardship/Public Outreach Funding and Sustained Support Funding and Sustained Support

Responsibility for Plan Implementation is Broad ACTION IMPLENTATION RESPONSIBILITY LocalJurisdictionsSewer/WaterAgenciesWildlifeAgenciesNGOsProjectProponentUniversitiesWatershedCouncil New Development Site Management ●● Preservation(Acquisition)●●●●● Riparian Buffer and Wetland Restoration ●●●●● Stream Restoration ●●●● Stormwater BMP Retrofit Projects ●● Monitoring●●●●● Stewardship/PublicOutreach●●● Funding and Sustained Support ●●●

Benefits of Implementing Agua Hedionda WMP Provides a comprehensive, geographically focused, scientifically-based plan for preserving, restoring, and enhancing watershed functions and minimizing future degradation. Provides a comprehensive, geographically focused, scientifically-based plan for preserving, restoring, and enhancing watershed functions and minimizing future degradation. Provides a roadmap to support existing Programs (MHCP/MSCP, Stormwater Permit, TMDLs, offset development impacts) Provides a roadmap to support existing Programs (MHCP/MSCP, Stormwater Permit, TMDLs, offset development impacts) Important element for obtaining future funding Important element for obtaining future funding SD Integrated Regional Water Management (IRWM)-$91M SD Integrated Regional Water Management (IRWM)-$91M Stormwater Management (Prop 84) - $82M Stormwater Management (Prop 84) - $82M Flood Control (Prop. 1e and 84) - $50+M Flood Control (Prop. 1e and 84) - $50+M Urban Stream Restoration (Prop 84) - $18M Urban Stream Restoration (Prop 84) - $18M Future Water Bonds - $$$ Future Water Bonds - $$$

What’s Next? Adopt Watershed Management Plan Adopt Watershed Management Plan Establish Watershed Council to direct implementation, obtain grants and manage projects Establish Watershed Council to direct implementation, obtain grants and manage projects Local jurisdictions – MOA, MOU, JPA, LOA Local jurisdictions – MOA, MOU, JPA, LOA Stakeholder Advisory Board – Agencies, NGO’s, Interested Public Stakeholder Advisory Board – Agencies, NGO’s, Interested Public Dedicate partial staff time to support Watershed Council and resources to fund Watershed Coordinator Dedicate partial staff time to support Watershed Council and resources to fund Watershed Coordinator Examples – San Diego River Conservancy, Escondido Creek Watershed Alliance, San Deiguito River Parkway JPA, Buena Vista Lagoon JPA Examples – San Diego River Conservancy, Escondido Creek Watershed Alliance, San Deiguito River Parkway JPA, Buena Vista Lagoon JPA