Draft 2025 Urban Water Management Plan

Table of Contents

Section

Page

SECTION 1.

EXECUTIVE SUMMARY ..............................................................................1-1

SECTION 2.

AGENCY INFORMATION ............................................................................2-1

2.1 HISTORY OF AGENCIES IN LA HABRA GROUNDWATER BASIN.......................2-1

2.2 GOVERNANCE AND MANAGEMENT STRUCTURE.............................................2-2

2.3 LEGAL AUTHORITY...............................................................................................2-2

2.4 BUDGET ................................................................................................................. 2-2

SECTION 3.

MANAGEMENT AREA DESCRIPTION ........................................................3-1

3.1 LA HABRA GROUNDWATER BASIN SERVICE AREA ..........................................3-1

3.1.1

Jurisdictional Boundaries .................................................................................3-1

3.1.2

Existing Land Use Designations ......................................................................3-3

3.2 GROUNDWATER CONDITIONS............................................................................3-3

3.2.1

Groundwater Elevation ....................................................................................3-3

3.2.2

Regional Pumping Patterns .............................................................................3-3

3.2.3

Long-Term Groundwater Elevation Hydrograph...............................................3-5

3.2.4

Groundwater Storage Data ............................................................................3-10

3.2.5

Groundwater Quality Conditions ....................................................................3-10

3.2.6

Land Subsidence ...........................................................................................3-11

3.2.7

Groundwater and Surface Water Interactions and Groundwater Dependent Ecosystems ................................................................................................... 3-12

SECTION 4.

WATER BUDGET.........................................................................................4-1

4.1 BUDGET COMPONENTS ......................................................................................4-1

4.2 CHANGES IN GROUNDWATER STORAGE..........................................................4-1

4.3 WATER YEAR TYPE ..............................................................................................4-1

4.4 ESTIMATE OF SUSTAINABLE YIELD ...................................................................4-1

4.5 ESTIMATED WATER BUDGET..............................................................................4-2

SECTION 5.

WATER RESOURCE MONITORING PROGRAMS......................................5-1

5.1 OVERVIEW ............................................................................................................5-1

2017 BASIN 8-1 ALTERNATIVE

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Appendix F - 10

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