One Water One Watershed Plan Update 2018 Moving forward together Santa Ana River Watershed OWOW PLAN UPDATE 201 8 : MOVING FORWARD TOG ETHER SAWPA COMMISSION APPROVAL CERTIFICATION SAWPA NOVEMBER 2018 OWOW PLAN UPDATE 201 8 : MOVING FORWARD TOG ETHER INTENTIONALLY LEFT BLANK SAWPA NOVEMBER 2018 OWOW PLAN UPDATE 201 8 : MOVING FORWARD TOG ETHER OWOW STEERING COMMITTEE APPROVAL CERTIFICATION SAWPA NOVEMBER 2018 OWOW PLAN UPDATE 201 8 : MOVING FORWARD TOG ETHER INTENTIONALLY LEFT BLANK SAWPA NOVEMBER 2018 OWOW PLAN UPDATE 201 8 : MOVING FORWARD TOG ETHER TABLE OF CONTENTS ACRONYMS AND ABBREVIATIONS................................................................. ACR-1 EXECUTIVE SUMMARY .................................................................................... ES-1 1. INTRODUCTION TO ONE WATER, ONE WATERSHED .................................... 1 1.1. Overview ................................................................................................................................................ 1 1.2. History of Santa Ana River Watershed Planning...................................................................... 3 1.2.1. OWOW Plan: Moving Toward Sustainability.............................................................. 4 1.2.2. OWOW 2.0 Plan: Moving into Implementation ........................................................ 6 1.2.3. OWOW Plan Update 2018: MOVING FORWARD TOGETHER .............................. 9 1.3. Integrated Local Water Planning ................................................................................................ 12 2. CRAFTING THE OWOW PLAN UPDATE 2018 ............................................... 17 2.1. Stakeholder Involvement and Outreach ................................................................................... 17 2.1.1. The OWOW Community ................................................................................................. 17 2.1.2. The Message of OWOW ................................................................................................. 18 2.1.3. Pillar Workgroups ............................................................................................................. 19 2.1.4. Engaged Stakeholders ..................................................................................................... 19 2.1.5. Public Meetings, Conferences, and Presentations ................................................. 27 2.1.6. Email Blasts and Social Media ....................................................................................... 27 2.1.7. SAWPA Website ................................................................................................................ 28 2.2. Governance Structure ..................................................................................................................... 28 2.2.1. Pillar Workgroups ............................................................................................................. 29 2.2.2. OWOW Steering Committee ......................................................................................... 35 2.2.3. SAWPA Commission ........................................................................................................ 37 2.2.4. Evaluation of the Governance Structure .................................................................... 42 2.2.5. Planning Updates and Adoption ................................................................................ 44 2.3. Collaboration, Coordination, and Integration ........................................................................ 45 2.3.1. SAWPA as Watershed Coordinator ............................................................................. 47 2.3.2. Overview of Governing Laws, Judgments, and Agreements .............................. 48 2.3.3. Collaborative Efforts with Areas Adjacent to or Overlapping the Watershed ........................................................................................................................... 48 OWOW VISION, GOALS, AND OBJECTIVES ................................................. 51 3.1. Vision .................................................................................................................................................... 51 3.1.1. Shared Understandings ................................................................................................... 51 3.1.2. Principles .............................................................................................................................. 52 3.2. Goals and Objectives ...................................................................................................................... 53 3.3. Assessing Progress toward the Goals ........................................................................................ 53 3.4. Planning Targets ............................................................................................................................... 54 4. WATERSHED SETTING .............................................................................. 59 4.1. Physical Setting ................................................................................................................................. 59 SAWPA I NOVEMBER 2018 OWOW PLAN UPDATE 201 8 : MOVING FORWARD TOG ETHER 4.1.1. Climate .................................................................................................................................. 61 4.1.2. Hydrology and Geomorphology .................................................................................. 63 4.1.3. Groundwater ....................................................................................................................... 65 4.1.4. Surface Water Quality ...................................................................................................... 77 4.1.5. Open Space, Habitat, and Native Species ................................................................ 78 4.1.6. Natural Hazards ................................................................................................................. 83 4.2. Social Setting ..................................................................................................................................... 84 4.2.1. Disadvantaged Communities ........................................................................................ 87 4.2.2. Tribal Communities .......................................................................................................... 89 4.2.3. Land Use .............................................................................................................................. 89 4.3. Water Management Setting ......................................................................................................... 90 4.3.1. Water Infrastructure in the Santa Ana River Watershed ...................................... 91 4.3.2. Water Supply ...................................................................................................................... 96 4.3.3. Water Quality ................................................................................................................... 102 4.3.4. Flood Control.................................................................................................................... 120 4.3.5. Conservation and Reducing Regional Dependence on Delta Supply ............ 121 4.4. Envisioning the Future .................................................................................................................. 122 5. RECOMMENDED MANAGEMENT AND POLICY STRATEGIES ...................... 123 5.1. Water Resources Optimization .................................................................................................. 124 5.1.1. Links to the OWOW Goals ........................................................................................... 124 5.1.2. Recommended Management Strategies ................................................................ 124 5.1.3. Basis for Recommendations ........................................................................................ 126 5.1.4. Contributors – Water Resources Optimization ..................................................... 134 5.2. Water Quality .................................................................................................................................. 135 5.2.1. Links to the OWOW Goals ........................................................................................... 135 5.2.2. Recommended Management Strategies ................................................................ 135 5.2.3. Basis for Recommendations ........................................................................................ 136 5.2.4. Contributors – Water Quality ...................................................................................... 142 5.3. Tribal Communities ....................................................................................................................... 143 5.3.1. Links to the OWOW Goals ........................................................................................... 143 5.3.2. Recommended Management Strategies ................................................................ 144 5.3.3. Recommended Policy Strategies ............................................................................... 147 5.3.4. Basis for Recommendations ........................................................................................ 149 5.3.5. Integration with Other Pillars .....................................................................................