California Water Fix/BDCP/Delta Conveyance

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California's Future

Public Policy Institute of California (PPIC) | January 18th, 2018

Summary

Water management in California has always been challenging. The state’s variable climate is marked by long droughts and severe floods, with stark regional differences i

Water management in California has always been challenging. The state’s variable climate is marked by long droughts and severe floods, with stark regional differences in water availability and demand. California has adapted by building a vast network of storage and conveyance facilities to deliver water from the wetter parts of the state to population and farming centers in the Bay Area, the San Joaquin Valley, and Southern California. The Sacramento–San Joaquin Delta is a fragile link in the state’s water supply network, and a plan to address supply reliability, known as California WaterFix, faces many hurdles. California’s extensive network of dams is aging. Agricultural demand is becoming less flexible, as farmers are increasing tree crops (especially nuts), which must be watered every year. Conflicts are growing between human water use and water needed to support fish and other wildlife. And the latest cycle of droughts and floods provides a glimpse of an uncertain future under climate change. California’s water management challenges are complex, but they can be addressed. Solutions will involve difficult and sometimes costly trade-offs, as well as contentious legal and political changes.

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CalSim 3 Results for 2070 Climate Change and Sea Level Projections and Sensitivity Analysis

California Department of Water Resources (DWR) | January 17th, 2024

Summary

This Technical Memorandum (TM) summarizes the key findings from a sensitivity analysis performed to analyze operations of the proposed Delta Conveyance Project (DCP) and

This Technical Memorandum (TM) summarizes the key findings from a sensitivity analysis performed to analyze operations of the proposed Delta Conveyance Project (DCP) and potential project water supply benefits under a range of potential scenarios for 2070 conditions. These scenarios consider climate change, sea level rise (SLR), and various water management responses. In addition, this sensitivity analysis also helps to identify whether proposed project operations and potential project impacts detailed in the Final DCP Environmental Impact Report (EIR) would remain similar or differ under a different climate change and SLR scenario under 2070 conditions, a more distant future.

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Climate Change and the Delta: A Synthesis (Public Review Draft)

Delta Stewardship Council (Delta Council) | March 23rd, 2018

Summary

The Delta Reform Act of 2009 (Water Code Section 85066) requires that the Delta Stewardship Council adopt a Delta Plan (the Plan) to achieve the coequal goals of providin

The Delta Reform Act of 2009 (Water Code Section 85066) requires that the Delta Stewardship Council adopt a Delta Plan (the Plan) to achieve the coequal goals of providing a more reliable water supply for California and protecting, restoring, and enhancing the Delta ecosystem (Water Code Section 85000). In the time since the Plan was adopted in 2013, a significant shift in State planning for Delta ecosystem protection, restoration, and enhancement has occurred, prompting review of the Delta Plan to examine whether its strategies are still suited to achieve the ecological goals of the Delta Reform Act. As such, the Delta Stewardship Council (Council) is developing an amendment of the Plan’s Chapter 4, Protect, Restore, and Enhance the Delta Ecosystem. Council staff are reviewing the best-available science to inform amendment of Chapter 4 of the Delta Plan. To support this effort, Council staff have developed three science synthesis papers. This paper focuses on the effects of climate change in the Delta and is accompanied by two other papers focused on the Delta ecosystem (terrestrial and aquatic resources) and restoration. Climate change is of interest for the Chapter 4 amendment given recent rapid advancements in research on climate change and its effects on the Delta ecosystem that have occurred since the Delta Plan was adopted in 2013 (Dettinger et al. 2016). Climate change has the potential to significantly affect the Delta ecosystem by raising air and water temperatures, changing the timing and volume of flows into and through the Delta, increasing tidal inundation with sea-level rise (SLR), and increasing salinity intrusion into the Delta. Climate change is recognized as a global stressor in Chapter 4 of the 2013 Delta Plan, but the effects of climate change on Delta ecosystems are discussed only briefly and with limited consideration of management strategies that address the issue. Chapter 4 of the Delta Plan identifies five key stressors to the Delta ecosystem and core strategies for addressing each. Climate change has interrelated effects on all five core strategy areas: Delta flows, habitat, water quality, non-native 28 species, and hatcheries and harvest management. The Delta Reform Act specifies consideration of “the future impact of climate change and sea-level rise” (Water Code Section 85066), and identifies a restoration timeline horizon of 2100 (Water Code Section 85302). More generally, Executive Order B-30-15, signed by Governor Brown in April 2015, requires that State agencies incorporate climate change into planning and investment decisions, and that they prioritize natural infrastructure and actions for climate preparedness.

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Comments on the Delta Conveyance Project Draft Environmental Impact Statement

Delta Stewardship Council (Delta Council) | March 15th, 2023

Summary

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Conveyance - Delta (Resource Management Strategy)

California Department of Water Resources (DWR) | July 29th, 2016

Summary

The Sacramento-San Joaquin Delta (Delta) is the confluence point of the Sacramento and San Joaquin rivers as water is naturally conveyed westward from upstream water basi

The Sacramento-San Joaquin Delta (Delta) is the confluence point of the Sacramento and San Joaquin rivers as water is naturally conveyed westward from upstream water basins to the bays connected to the Pacific Ocean (Figure 1). In its natural state, the Delta was a vast marsh and floodplain dissected by meandering channels and sloughs. Even in today’s highly altered environment, the Delta remains a critical ecosystem and dynamic habitat that is home to hundreds of aquatic and terrestrial species, including many species endemic to the area and a number that are designated as threatened or endangered by the federal Endangered Species Act (ESA) and California Endangered Species Act (CESA). The Delta is also a centerpiece of California’s water system. The conveyance of water through the Delta supplies water for more than 25 million Californians. The water conveyed through the Delta also supports farms and ranches stretching from the north Delta to California-Mexico border, which collectively produce nearly half of the nation’s domestically grown fresh produce and supports a $27 billion agricultural industry. In addition to being a key agricultural region itself and recreational destination, the Delta supports extensive infrastructure of statewide importance, such as aqueducts, natural gas pipelines, electricity transmission lines, railroads, shipping channels, and highways.

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Dealing with the Delta: Envisioning Futures, Finding Solutions (Research Brief)

Public Policy Institute of California (PPIC) | February 15th, 2007

Summary

This research brief summarizes a report by Jay Lund, Ellen Hanak, William Fleenor, Richard Howitt, Jeffrey Mount, and Peter Moyle, Envisioning Futures for the Sacramento�

This research brief summarizes a report by Jay Lund, Ellen Hanak, William Fleenor, Richard Howitt, Jeffrey Mount, and Peter Moyle, Envisioning Futures for the Sacramento–San Joaquin Delta.

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Delta Conveyance Environmental Review Notice of Preparation Overview

California Department of Water Resources (DWR) | January 15th, 2020

Summary

The Department of Water Resources (DWR) is pursuing an environmental review process to evaluate a single tunnel option to modernize Delta conveyance under the California

The Department of Water Resources (DWR) is pursuing an environmental review process to evaluate a single tunnel option to modernize Delta conveyance under the California Environmental Quality Act (CEQA). The first step in this process is release of a Notice of Preparation (NOP). The NOP informs agencies and the public about the preparation of the Environmental Impact Report (EIR) and solicits input on the scope and content of the EIR, including information needs, potential project effects and mitigation measures, and possible alternatives to the proposed project. Modernizing Delta conveyance is part of the state’s Water Resilience Portfolio, which describes the framework to address California’s water challenges and support long-term water resilience and ecosystem health.

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Delta Conveyance Project Draft Environmental Impact Report Explained

California Department of Water Resources (DWR) | July 27th, 2022

Summary

The Delta Conveyance Project Draft Environmental Impact Report Explained is a companion to the Delta Conveyance Project’s Draft Environmental Impact Report (EIR) to hel

The Delta Conveyance Project Draft Environmental Impact Report Explained is a companion to the Delta Conveyance Project’s Draft Environmental Impact Report (EIR) to help members of the public better understand the proposed Delta Conveyance Project and the requirements for the Department of Water Resources (DWR) in preparing an EIR under the California Environmental Quality Act (CEQA). Although not required by CEQA, this document is intended to acquaint readers with the proposed Delta Conveyance Project and alternatives analyzed in the Draft EIR and provide a short summary of impacts to key resource areas. This document is separate from and not intended to be a substitute or surrogate for the comprehensive summary of the Draft EIR that is being circulated with the Draft EIR. Readers are encouraged to review the Draft EIR Executive Summary and full Draft EIR and provide comments during the public review period.

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