Table of Contents
Section
Page
2.1 HISTORY OF AGENCIES IN SANTA ANA CANYON MANAGEMENT AREA ........2-1
2.2 GOVERNANCE AND MANAGEMENT STRUCTURE.............................................2-1
2.3 LEGAL AUTHORITY...............................................................................................2-1
2.4 BUDGET ................................................................................................................. 2-2
3.1 SANTA ANA CANYON MANAGEMENT AREA ......................................................3-1
3.1.1
Jurisdictional Boundaries .................................................................................3-3
3.1.2
Existing Land Use Designations ......................................................................3-3
3.2 GROUNDWATER CONDITIONS............................................................................3-4
3.2.1
Groundwater Elevation ....................................................................................3-4
3.2.2
Groundwater Beneficial Uses and Regional Pumping Patterns........................3-5
3.2.3
Groundwater Storage Data ..............................................................................3-7
3.2.4
Groundwater Quality Conditions ......................................................................3-7
3.2.5
Land Subsidence .............................................................................................3-7
3.2.6
Groundwater and Surface Water Interactions and Groundwater Dependent Ecosystems ..................................................................................................... 3-7
4.1 BUDGET COMPONENTS ......................................................................................4-1
4.1.1
Subsurface Inflow/Outflow ...............................................................................4-2
4.1.2
Infiltrated Santa Ana River Base Flow..............................................................4-2
4.1.3
Evapotranspiration ...........................................................................................4-2
4.1.4
Groundwater Production ..................................................................................4-2
4.2 CHANGES IN GROUNDWATER STORAGE..........................................................4-2
4.3 WATER YEAR TYPE ..............................................................................................4-3
4.4 ESTIMATE OF SUSTAINABLE YIELD ...................................................................4-3
4.5 CURRENT, HISTORICAL, AND PROJECTED WATER BUDGET..........................4-3
5.1 OVERVIEW ............................................................................................................5-1
BASIN 8-1 ALTERNATIVE 2022 UPDATE
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Appendix F - 240
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