Figure 2-5 Bulletin 118, Groundwater Basins in the Upper Santa Ana Region

331 Pages·2008·5.55 MB·English

by  Naser Bateni

Table of Contents
1 Introduction 1-1

1.1 Background 1-1
1.1.1 Overview of Plan Area 1-1
1.2 Integrated Regional Water Management Plan 1-5
1.2.1 Santa Ana Watershed Project Authority 1-6
1.3 Other Integrated Regional Water Management Activities in the Watershed 1-8
1.3.1 Santa Ana Watershed Project Authority IRWM Plan 1-8
1.3.2 Western Municipal Water District Integrated Regional Water
Management Plan, November 2006 (IRWM Plan) 1-9
1.3.3 The San Jacinto Watershed Component of the Santa Ana
Integrated Watershed Plan 1-10
1.3.4 The San Timoteo Watershed Management Authority IRWM
Program 1-10
1.4 Previous Related Work 1-13
1.4.1 State Water Resources Control Board Orders 1-13
1.5 Overview of Governing Laws, Judgments, and Agreements 1-15
1.5.1 Integrated Regional Planning Act 1-15
1.5.2 Groundwater Management Planning Act 1-15
1.5.3 Cooperative Agreement to Protect Water Quality and Encourage
the Conunctive Uses of Imported Water in the Santa Ana River
Basin 1-17
1.5.4 Seven Oaks Accord 1-17
1.5.5 Orange County Judgment 1-18
1.5.6 Western Judgment 1-19
1.5.7 Agreement Relating to the Diversion of Water from the Santa Ana
River System Among Western Municipal Water District of
Riverside County, San Bernardino Valley Municipal Water
District and City of Riverside 1-20
1.5.8 The Beaumont Basin Judgment 1-21
1.5.9 1961 Rialto Basin Judgment 1-21
1.5.10 Local Institutional Considerations 1-22
1.6 Purpose of the IRWM Plan 1-27
1.6.1 Uncertainty of Imported Water Alone to Meet Long-Term Needs 1-27
1.6.2 Threat of Liquefaction in the Pressure Zone 1-28
1.7 IRWM Plan Planning Process 1-31
1.7.1 Technical Advisory Group Member Agencies 1-31
1.7.2 Public Participation 1-31
1.7.3 Dispute Resolution Process 1-34
1.8 Water Agencies in the Region 1-35
1.8.1 Valley District 1-37
1.8.2 San Bernardino Valley Water Conservation District 1-39
1.8.3 City of Redlands 1-40
1.8.4 West Valley Water District 1-40
1.8.5 East Valley Water District 1-41
1.8.6 San Bernardino Municipal Water Department 1-41
1.8.7 Yucaipa Valley Water District 1-41
1.8.8 City of Riverside 1-42
1.8.9 Water Resources Institute/California State University,
San Bernardino 1-42
1.8.10 San Bernardino County Flood Control District 1-43
1.8.11 San Gorgonio Pass Water Agency 1-44
1.8.12 City of Big Bear Lake Department of Water and Power 1-44
1.8.13 Fontana Union Water Company 1-45
1.8.14 San Timoteo Watershed Management Authority 1-45
1.8.15 Bear Valley Mutual Water Company 1-46
1.8.16 Beaumont Cherry Valley Water District 1-46
1.8.17 Big Bear Municipal Water District 1-46
1.8.18 City of Colton Public Utilities Department 1-47
1.8.19 City of Loma Linda 1-47
1.8.20 City of Rialto 1-47
1.8.21 Fontana Water Company 1-48
1.8.22 Marygold Mutual Water Company 1-48
1.8.23 Muscoy Mutual Water Company 1-48
1.8.24 Regents of the University of California 1-49
1.8.25 Riverside Highland Water Company 1-49
1.8.26 Other Water Purveyors in the Region 1-49
1.9 Contents of the IRWM Plan 1-51

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2 Description of the Integrated Regional Water Management Plan
Area 2-1

2.1 Location 2-1
2.1.1 General IRWM Plan Region 2-1
2.2 Climate 2-4
2.3 Population 2-5
2.3.1 Historic Population and Housing Growth in the Plan Area 2-5
2.3.2 Future Population Growth in the Region and Valley District
Service Area 2-5
2.4 Land Use and Agricultural Lands Stewardship 2-8
2.5 Economic Condition and Social and Cultural Composition of the Region 2-11
2.5.1 Composition of Population and Tribe 2-11
2.6 Major Water-Related Infrastructure in Region 2-16
2.6.1 State Water Project Facilities 2-16
2.6.2 State Water Contractors Facilities 2-16
2.6.3 Regional Water Supply Infrastructure 2-19
2.6.4 Regional Flood Control Infrastructure 2-19
2.7 Surface Hydrology 2-20
2.7.1 Natural Runoff 2-20
2.7.2 Imported Water 2-22
2.7.3 Wastewater 2-22
2.7.4 Surface Water Quality 2-23
2.8 Geologic Setting and Groundwater Systems 2-28
2.8.1 Groundwater Basins in the Upper Sana Ana Region 2-28
2.9 Groundwater Management in the Region 2-58
2.9.1 Recharge Area Programs 2-58
2.9.2 SAR Natural Recharge 2-64
2.9.3 Groundwater Discharge from SBBA 2-65
2.9.4 Groundwater Storage 2-66
2.9.5 Groundwater Quality 2-68
2.10 Ecological and Environmental Resources 2-75
2.10.1 San Bernardino National Forest Land and Resource Management
Plan 2-75
2.10.2 U.S. Bureau of Land Management (BLM) Area of Critical
Environmental Concern 2-75
2.10.3 U.S. Army Corps of Engineers Woolly-Star Preserve Area 2-76
2.10.4 Western Riverside County Multi-Species Habitat Conservation
Plan 2-76
2.10.5 SAR Corridor 2-76

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3 Water Budget for Integrated Regional Water Management Plan
Region 3-1

3.1 Review of Previously Published Water Budgets 3-2
3.2 Data Sources 3-3
3.2.1 Applied Water Demands 3-4
3.2.2 Water Supplies 3-8
3.2.3 Water Budget Summary 3-20

4 Develop Integrated Regional Water Management Plan 4-1

4.1 Introduction 4-1
4.2 Water Management Objectives, Strategies, and Projects (California Water
Code §§ 79562.5 and 79564) 4-3
4.2.1 Improve Water Supply Reliability 4-4
4.2.1.1 Water Conservation Strategies and Projects 4-6
4.2.1.2 Water Recycling Strategies and Projects 4-17
4.2.1.3 Groundwater Management Strategies and Projects 4-24
4.2.1.4 Surface Water Management Strategies and Projects 4-61
4.2.1.5 Imported Supplies 4-67
4.2.1.6 Performance Evaluation of Water Supply
Reliability Strategies 4-70
4.2.1.7 Disaster Preparedness Strategies and Projects 4-77
4.2.2 Protect and Enhance Water Quality Objective 4-89
4.2.2.1 Total Dissolved Solids and Nitrogen
Management Strategy 4-90
4.2.2.2 Remediation of Groundwater Contamination Strategy 4-93
4.2.2.3 Improving Groundwater Quality by Recharge of the Basins
with Good Quality Water 4-95
4.2.2.4 Surface Water Quality Improvement Strategy 4-98
4.2.2.5 Groundwater and Surface Water Quality
Monitoring Strategy 4-99
4.2.3 Ecosystem Restoration and Environmental Improvement Objective 4-101
4.2.3.1 Habitat Protection, Restoration, and
Enhancement Strategy 4-102
4.2.3.2 Land Use Planning Strategy 4-108

5 Integrated Regional Water Management Plan Implementation 5-1
5.1 Integration of Water Management Strategies 5-1
5.1.1 Integration of Surface Water and Groundwater Resources
Strategies 5-2
5.1.2 Integration of Stormwater Management, Flood Management,
Water Supply Reliability, and Surface and Groundwater Quality 5-3
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5.1.3 Integration of Water Supply Reliability and Water Quality
Strategies 5-3
5.1.4 Integration Of Imported Water And Local Water Supplies
Strategies 5-4
5.2 Project Identified for IRWM Plan Implementation 5-5
5.2.1 Project Prioritization and Screening Process 5-5
5.2.2 Economic and Technical Feasibility of the Projects 5-12
5.3 Implementation Considerations 5-13
5.3.1 Institutional Structures Needed for Plan Implementation 5-13
5.3.2 Project Implementation 5-13
5.3.3 Periodic Review and Update of the IRWM Plan 5-13
5.3.4 Statewide Priority and Issues of State Significance 5-14
5.4 Capital Improvement Funding 5-16
5.4.1 Federal Funding 5-16
5.4.2 State Grant Funding 5-16
5.4.3 Local Agency Funding 5-17
5.5 Obstacles to Implementation 5-18
5.6 Impacts and Benefits of the Upper Santa Integration Regional Water
Management plan 5-19
5.6.1 IRWM Plan Benefits 5-19
5.6.2 IRWM Plan Impacts 5-20
6 Data Management and Monitoring, Technical Analyses, and Plan
Performance 6-1
6.1 Part I: Data Management and Technical Analyses for Plan Prepartaion 6-2
6.1.1 Use of Available Information to Develop the IRWM Plan 6-2
6.1.2 Existing Information and Reports 6-2
6.1.3 Data Management and Monitoring 6-3
6.1.4 Technical Analyses to Develop the IRWM Plan and Projects 6-3
6.2 Part II: Monitoring, Data Management, Plan Performance, and Adaptive
Process During Plan Implementation 6-6
6.2.1 Data Collection and Monitoring 6-6
6.2.2 Data Gaps/Additional Monitoring Requirements 6-7
6.2.3 Management of the Data 6-8
6.2.4 Adaptive Management and Plan Performance for the Upper Santa
Ana IRWM Plan 6-8
7 Glossary of Terms 7-1
8 References 8-1
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Appendix A: Relevant Judgments, Agreements, and Accords
Appendix B: Monitoring Plan
Appendix C: Modeling
Appendix D: Public Involvement Documentation
Appendix E: Project Descriptions
Appendix F: Vulnerability to Catastrophic Interruption of Water
Supply
Appendix G: Task 15 - State Water Project Peak Day Demands for
Customers of the San Bernardino Valley Municipal Water District

Table of Figures
Figure 1-1 Santa Ana River Watershed 1-3
Figure 1-2 Upper Santa Ana River Watershed 1-4
Figure 1-3 Water Agencies in the Region 1-36
Figure 1-4 Service Area of Technical Advisory Group Member Agencies 1-38
Figure 2-1 Communities in the Upper Santa Ana Region 2-2
Figure 2-2 Land Use 2-9
Figure 2-3 Economically Disadvantage Communities 2-12
Figure 2-4 Major Water-Related Infrastructure 2-16
Figure 2-5 Bulletin 118, Groundwater Basins in the Upper Santa Ana Region 2-29
Figure 2-6 Groundwater Basins and Faults in the Region 2-32
Figure 2-7 Rialto-Colton Subbasin and Faults 2-35
Figure 2-8 Water-Bearing Units in the Rialto-Colton Subbasin 2-36
Figure 2-9 Spreading Basins in the Rialto-Colton Subbasins 2-37
Figure 2-10 San Bernardino Basin Area 2-43
Figure 2-11 Representative Geologic Sections - SBBA 2-47
Figure 2-12 Water-Bearing and Confining Members - SBBA 2-50
Figure 2-13 SBBA Pressure Zone 2-51
Figure 2-14 SBBA Groundwater Contours 2-54
Figure 2-15 SBBA Groundwater Flows 2-57
Figure 2-16 Location of Spreading Grounds in the Region 2-62
Figure 2-17 Contaminant Plumes in SBBA 2-72
Figure 3-1 Water Demands within the Region 3-5
Figure 3-2 Water Budget Summary - SBBA 3-9
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Figure 3-3 IRWMP Region – Water Budget Summary 3-21
Figure 3-4 Water Supply Summary 3-23
Figure 4-1 Objectives and Strategies 4-2
Figure 4-2 Best Management Practices 4-8
Figure 4-3 Statewide Annual Water Savings from Implementation of Selected
BMPs 4-9
Figure 4-4 Annual Estimated Water Savings from BMPs 4-11
Figure 4-5 BMP Cost per Acre-Foot 4-12
Figure 4-6 BMP Benefit and Cost/Benefit 4-13
Figure 4-7 Tilted Basin 4-27
Figure 4-8 Developing Groundwater Management Operational Strategies 4-29
Figure 4-9 Groundwater Modeling Assumptions 4-32
Figure 4-10 Hydrologic Budget Summary 4-34
Figure 4-11 Overview of Process for Managing the San Bernardino Basin Area 4-38
Figure 4-12 Process for Managing the San Bernardino Basin Area 4-40
Figure 4-13 Historical TDS for East Branch at Silverwood Lake and
Basin Objectives - Beaumont Basin 4-54
Figure 4-14 Historical TDS for East Branch at Silverwood Lake and
Basin Objectives - Bunker Hill 4-55
Figure 4-15 Historical TDS for East Branch at Silverwood Lake and
Basin Objectives - San Timoteo 4-56
Figure 4-16 Historical TDS for East Branch at Silverwood Lake and
Basin Objectives - Yucaipa 4-57
Figure 4-17Proposed Facilities for the Use of Santa Ana River Water 4-63
Figure 4-18 Santa Ana River Annual Flow and SWP Availability 4-71
Figure 4-19 Cumulative Annual Changes in Groundwater Storage for Baseline
Conjunctive Use Scenario 4-73
Figure 5-1 Integrated Regional Water Management Planning 5-2
Figure 5-2 Planning Process for Project Screening and Ranking 5-6
Figure 5-3 Project Locations 5-13
Figure 5-4 Implementation Schedule 5-18

List of Tables
Table 1-1 SWP Dry Year Delivery from the Delta as Percent of SWP Table A
Entitlements 1-25
Table 2-1 Riverside and San Bernardino County Population, 1990 and 2000 2-5
Table 2-2 SCAG County Population Projections, 2010-2025 2-6
Table 2-3. Population of Plan Area and Valley District
Service Area, 2000-2025 2-7
Table 2-4 Median Annual Household Income for Water Purveyor
Service Areas 2-15
Table 2-5. Upper SAR Median, Maximum, and Minimum Annual Flow 2-21
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Table 2-6. Tributary Flow Contribution to the SAR (100-Year Flood Event
Discharge in cfs) 2-21
Table 2-7. Treated Wastewater Discharged Directly to the SAR above Riverside
Narrows 2-23
Table 2-8. SAR Basin Surface Water Quality Objectives* 2-26
Table 2-9. Average Historic Surface Water Quality for Locations on the SAR
(1990-2001) 2-27
Table 2-10 Groundwater Basins in Upper Santa Ana Region 2-29
Table 2-11. Recharge Facilities 2-61
Table 2-12. Summary of Groundwater Storage Capacities and Basin Surface Area 2-66
Table 2-13. Prevalence of Contaminants in SBBA Wells 2-69
Table 2-14. Prevalence of Contaminants in Rialto–Colton Subbasin Wells 2-72
Table 2-15. Prevalence of Contaminants in Riverside Subbasin Wells 2-73
Table 2-16. Prevalence of Contaminants in Yucaipa Subbasin Wells 2-74
Table 2-17. Prevalence of Contaminants in San Timoteo Subbasin Wells 2-74
Table 3-1 Data Utilized in the Water Budget 3-2
Table 3-2 Future Applied Water Demands in the Region (Acre-Feet per
year) 3-4
Table 3-3 Projected SBBA Local Surface Water Diversions and Groundwater
Extractions 3-8
Table 3-4 Projected Extractions in the Colton Basin Area (Acre-Feet per Year) 3-11
Table 3-5 Projected Extractions in the Riverside North Basin (Acre-Feet per
Year) 3-12
Table 3-6 Projected Extractions in the Yucaipa Basin (Acre-Feet per Year) 3-13
Table 3-7 Projected Extractions of Other Groundwater and Surface Water
Supplies (Acre-Feet per Year) 3-14
Table 3-8 Projected Deliveries of State Water Project (Acre-Feet per Year) 3-17
Table 3-9 Available State Water Supplies Based on Table A Amounts (AFY) 3-17
Table 3-10 Projected Use of Recycled Water (Acre-Feet per Year) 3-18
Table 3-11 Water Budget Summary for Valley District and San Bernardino
Mountains (Acre-Feet per Year) for an Average Year 3-19
Table 3-12 Water Budget Summary for San Gorgonio Pass Water Agency Area 3-20
Table 3-13 Region-Wide Water Budget Summary for Average Year 3-20
Table 3-14 Region-Wide Water Budget Summary for Multi-Year Drought 3-20
Table 3-15 Region-Wide Water Budget Summary for a Single-Dry Year 3-21
Table 4-1 Upper Santa Ana River Water Agencies Implementation of BMPs 4-10
Table 4-2 Upper Santa Ana River Water Agencies Recycling Water Programs 4-23
Table 4-3 Summary of Potential Additional Yield for the SBBA 4-36
Table 4-4 Facilities Needed to Implement Various Conjunctive Use Program
Scenarios 4-37
Table 4-5 Future Peak Day SWP Demand for SBVMWD 4-76
Table 4-6 Valley District Facilities Used to Deliver Water to Retail Agencies 4-80
Table 4-7 System Interties between Retail Agencies 4-83
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Table 4-8 PCM Model of Precipitation 4-87
Table 5-1 Projects by Ranking 5-9
Table 5-2 Upper Santa Ana IRWMP Prioritization and Cost 5-11
Table 6-1 Example of Project Performance Indicator to
Assess Project Success 6-11
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