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2015 URBAN WATER MANAGEMENT PLAN - Santa · PDF file2015 URBAN WATER MANAGEMENT PLAN . 2015 URBAN WATER MANAGEMENT PLAN . City of Santa Ana . Prepared for: ... 5.2.3 City of Santa

Nov 09, 2018

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  • 2015

    URBAN WATER MANAGEMENT PLAN

    FINAL DRAFT

    April 2016

    ,

  • 2015 URBAN WATER MANAGEMENT PLAN

    2015 URBAN WATER MANAGEMENT PLAN City of Santa Ana

    Prepared for:

    City of Santa Ana

    Public Works Agency

    Water Resources Division

    20 Civic Center Plaza

    Santa Ana, CA 92701

    Prepared by:

    Arcadis U.S., Inc.

    445 South Figueroa Street

    Suite 3650

    Los Angeles

    California 90071

    Tel 213 486 9884

    Fax 213 486 9894

    Our Ref.:

    4109039.0000

    Date:

    April 2016

    FINAL DRAFT

    arcadis.com

  • 2015 URBAN WATER MANAGEMENT PLAN

    CONTENTS Acronyms and Abbreviations ....................................................................................................................... vii

    1 Introduction .......................................................................................................................................... 1-1

    1.1 Urban Water Management Plan Requirements ........................................................................... 1-1

    1.2 Agency Overview ......................................................................................................................... 1-3

    1.3 Service Area and Facilities .......................................................................................................... 1-6

    1.3.1 City of Santa Ana Service Area ........................................................................................ 1-6

    1.3.2 City of Santa Ana Water Facilities .................................................................................... 1-7

    2 Demands .............................................................................................................................................. 2-1

    2.1 Overview ...................................................................................................................................... 2-1

    2.2 Factors Affecting Demand ........................................................................................................... 2-1

    2.2.1 Climate Characteristics .................................................................................................... 2-2

    2.2.2 Demographics .................................................................................................................. 2-2

    2.2.3 Land Use .......................................................................................................................... 2-2

    2.3 Water Use by Customer Type ..................................................................................................... 2-3

    2.3.1 Overview ........................................................................................................................... 2-3

    2.3.2 Non-Residential ................................................................................................................ 2-4

    2.3.3 Sales to Other Agencies ................................................................................................... 2-4

    2.3.4 Non-Revenue Water ......................................................................................................... 2-4

    2.3.4.1 AWWA Water Audit Methodology ........................................................................... 2-4

    2.4 Demand Projections..................................................................................................................... 2-6

    2.4.1 Demand Projection Methodology ..................................................................................... 2-7

    2.4.2 Agency Refinement .......................................................................................................... 2-7

    2.4.3 25 Year Projections .......................................................................................................... 2-7

    2.4.4 Total Water Demand Projections ..................................................................................... 2-9

    2.4.5 Water Use for Lower Income Households ....................................................................... 2-9

    2.5 SBx7-7 Requirements ................................................................................................................2-10

    2.5.1 Baseline Water Use ........................................................................................................2-11

    2.5.1.1 Ten to 15-Year Baseline Period (Baseline GPCD) ...............................................2-11

    2.5.1.2 Five-Year Baseline Period (Target Confirmation) ................................................2-12

    arcadis.com i

  • 2015 URBAN WATER MANAGEMENT PLAN

    2.5.1.3 Service Area Population .......................................................................................2-12

    2.5.2 SBx7-7 Water Use Targets ............................................................................................2-12

    2.5.2.1 SBx7-7 Target Methods ........................................................................................2-12

    2.5.2.2 2015 and 2020 Targets ........................................................................................2-13

    2.5.3 Regional Alliance ............................................................................................................2-14

    3 Water Sources and Supply Reliability .................................................................................................. 3-1

    3.1 Overview ...................................................................................................................................... 3-1

    3.2 Imported Water ............................................................................................................................ 3-2

    3.2.1 Colorado River Supplies ................................................................................................... 3-2

    3.2.2 State Water Project Supplies ........................................................................................... 3-4

    3.2.3 Storage ............................................................................................................................. 3-8

    3.3 Groundwater ................................................................................................................................ 3-8

    3.3.1 Basin Characteristics ........................................................................................................ 3-8

    3.3.2 Basin Production Percentage .........................................................................................3-10

    3.3.2.1 2015 OCWD Groundwater Management Plan .....................................................3-10

    3.3.2.2 OCWD Engineers Report ....................................................................................3-11

    3.3.3 Groundwater Recharge Facilities ...................................................................................3-12

    3.3.4 Metropolitan Groundwater Replenishment Program ......................................................3-12

    3.3.5 Metropolitan Conjunctive Use Program .........................................................................3-13

    3.3.6 Groundwater Historical Extraction ..................................................................................3-13

    3.3.7 Overdraft Conditions.......................................................................................................3-13

    3.4 Summary of Existing and Planned Sources of Water ................................................................3-14

    3.5 Recycled Water ..........................................................................................................................3-16

    3.6 Supply Reliability........................................................................................................................3-16

    3.6.1 Overview .........................................................................................................................3-16

    3.6.2 Factors Impacting Reliability ..........................................................................................3-16

    3.6.2.1 Environment ..........................................................................................................3-16

    3.6.2.2 Legal .....................................................................................................................3-16

    3.6.2.3 Water Quality ........................................................................................................3-17

    3.6.2.3.1 Imported Water ...........................................................................................3-17

    3.6.2.3.2 Groundwater ...............................................................................................3-17

    arcadis.com ii

  • 2015 URBAN WATER MANAGEMENT PLAN

    3.6.2.4 Climate Change ....................................................................................................3-19

    3.6.3 Normal-Year Reliability Comparison ..............................................................................3-19

    3.6.4 Single-Dry Year Reliability Comparison .........................................................................3-19

    3.6.5 Multiple-Dry Year Period Reliability Comparison ...........................................................3-20

    3.7 Supply and Demand Assessment ..............................................................................................3-20

    4 Demand Management Measures..

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