Executive Summary: Contents

Foreword

Chapter ES1. Introduction

Bulletin 160-98 Hydrologic Regions

Changes Since the Last California Water Plan Update

Changes in Response to Bulletin 160-93 Public Comments

Changes in Future Demand/Shortage Forecasts

Public Comments on Draft

Works in Progress and Uncertainties

Presentation of Data in Bulletin 160-98

Chapter ES2. Current Events in California Water Management

Legislation

Proposition 204

Proposition 218

MTBE

Safe Drinking Water Act

Reclamation, Recycling, and Water Conservation Act of 1996

Water Desalination Act of 1996

Bay-Delta Accord and CALFED

Colorado River

Recent ESA Listings

January 1997 Central Valley Floods

CVPIA Implementation

SWP Monterey Agreement Contract Amendments

Environmental Restoration Activities

Implementation of Urban Water Conservation MOU

Implementation of Agricultural Efficient Water Management Practices MOU

Klamath River Fishery Issues

Truckee-Carson River System

City of Los Angeles' Water Supply from Owens Valley

Mono Basin

Salton Sea

Chapter ES3. Water Supplies

Definition of Bulletin 160 Water Supplies

Applied Water Methodology

Normalized Data

Water Supply Scenarios

Surface Water Supplies

Groundwater Supplies

Water Marketing

Water Recycling and Desalting Supplies

Water Supply Summary by Hydrologic Region

Chapter ES4. Urban, Agricultural, and Environmental Water Use

Population Growth

Factors Affecting Urban Per Capita Water Use

Urban Water Use Forecasting

Summary of Urban Water Use

Crop Water Use

Quantifying Base Year Irrigated Acreage

Forecasting Future Irrigated Acreage

Summary of Agricultural Water Use

Wild and Scenic River Flows

Instream Flows

BayDelta Outflow

Wetlands

Summary of Environmental Water Use

Chapter ES5. Balancing Supply and Demand

Water Supply

Water Demand

Water Shortages

Major Steps in Planning Process

Shortage Management

Using Applied Water Budgets to Calculate New Water Needs

Implementing Future Water Management Options

Bulletin 160-98 Findings
 

Appendix ES5A. Regional Water Budgets with Existing Facilities and Programs

Appendix ES5B. Regional Water Budgets with Options Likely to be Implemented

Abbreviations and Acronyms

Tables

Table ES2-2. Large Structural Fishery Restoration Projects

Table ES2-3. Proposition 204 Funding Breakdown

Table ES3-1. California Water Supplies with Existing Facilities and Programs

Table ES3-2. 1995 and 2020 Level Overdraft by Hydrologic Region

Table ES3-3. Recently Completed Long-Term Water Marketing Agreements

Table ES3-4. 2020 Level Total Water Recycling and New Water Supply

Table ES3-5. California Average Year Water Supplies by Hydrologic Region

Table ES3-6. California Drought Year Water Supplies by Hydrologic Region

Table ES4-1. California Population by Hydrologic Region

Table ES4-2. Effects of Conservation on Per Capita Water Use by Hydrologic Region

Table ES4-3. Applied Urban Water Use by Hydrologic Region

Table ES4-4. California Crop and Irrigated Acreage by Hydrologic Region, 1995 Level

Table ES4-5. California Crop and Irrigated Acreage by Hydrologic Region, 2020 Level

Table ES4-6. Applied Agricultural Water Use by Hydrologic Region

Table ES4-7. Wild and Scenic River Flows by Hydrologic Region

Table ES4-8. Instream Flow Requirements by Hydrologic Region

Table ES4-9. Wetlands Water Use by Hydrologic Region

Table ES4-10. Applied Environmental Water Use by Hydrologic Region

Table ES4-11. California Average Year Water Use by Hydrologic Region

Table ES4-12. California Drought Year Water Use by Hydrologic Region

Table ES5-1. California Water Budget with Existing Facilities and Programs

Table ES5-2. Summary of Options Likely to be Implemented by 2020, by Option Type

Table ES5-3. California Water Budget with Options Likely to be Implemented

Table ES5A-1. North Coast Region Water Budget with Existing Facilities and Programs

Table ES5A-2. San Francisco Bay Region Water Budget with Existing Facilities and Programs

Table ES5A-3. Central Coast Region Water Budget with Existing Facilities and Programs

Table ES5A-4. South Coast Region Water Budget with Existing Facilities and Programs

Table ES5A-5. Sacramento River Region Water Budget with Existing Facilities and Programs

Table ES5A-6. San Joaquin River Region Water Budget with Existing Facilities and Programs

Table ES5A-7. Tulare Lake Region Water Budget with Existing Facilities and Programs

Table ES5A-8. North Lahontan Region Water Budget with Existing Facilities and Programs

Table ES5A-9. South Lahontan Region Water Budget with Existing Facilities and Programs

Table ES5A-10. Colorado River Region Water Budget with Existing Facilities and Programs

Table ES5B-1. North Coast Region Water Budget with Options

Table ES5B-2. San Francisco Bay Region Water Budget with Options

Table ES5B-3. Central Coast Region Water Budget with Options

Table ES5B-4. South Coast Region Water Budget with Options

Table ES5B-5. Sacramento River Region Water Budget with Options

Table ES5B-6. San Joaquin River Region Water Budget with Options

Table ES5B-7. Tulare Lake Region Water Budget with Options

Table ES5B-8. North Lahontan Region Water Budget with Options

Table ES5B-9. South Lahontan Region Water Budget with Options

Table ES5B-10. Colorado River Region Water Budget with Options

Sidebars

California's Hydrologic Regions

American River Flood Protection

Sacramento River Flood Control Project

CVPIA's Dedicated Water

Key Water Supply and Water Use Definitions

Procedures for Normalizing Water Supply and Water Use Data

Initial Screening Criteria

Options Category Evaluation