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

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

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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

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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..