Delta Science Plan (2016 update)

Delta Stewardship Council (Delta Council) | May 9th, 2016

The Delta of the Sacramento and San Joaquin rivers is the hub of California’s extensive water supply system and critical to the State’s economy. However, emerging sca

The Delta of the Sacramento and San Joaquin rivers is the hub of California’s extensive water supply system and critical to the State’s economy. However, emerging scarcities of water in the Delta watersheds, which are expected to intensify with global warming, threaten California’s ability to sustain further economic development and population growth.  At the same time, patterns of water and land use have resulted in severe declines in the abundances of many valuable native species. Protecting and restoring these species while maintaining a reliable water supply and building California’s economic future is an absolute priority. The economic and environmental stakes in the Delta are enormous. Over 27 million people rely on Delta water and the ecosystem has been degraded to the point where over 60 native species are listed as threatened or endangered. The Delta and its water supply infrastructure are also highly vulnerable to earthquakes, floods, and droughts. Proposed actions under the Bay Delta Conservation Plan to reduce risks to the people, ecosystems and economy of California are likely to cost many billions of dollars. Achieving the co-goals of the Delta Plan will depend upon acquiring and communicating a new shared body of scientific knowledge to catalyze cultural change. The Delta Science Plan is intended to be that catalyst. The Delta Science Plan provides direction for achieving an integrated, collaborative and transparent science of the Delta to enhance policy and management decisions. The Plan is transformative and uses principles that have proven successful in other Big Science programs – embracing emerging technologies and fostering open science communities. The science plan uses collaboration to build trust and acquire a shared body of scientific knowledge. It proposes new mechanisms for synthesis and communication that will enhance decision-making and reduce conflicts that hinder policy decisions. Vigorous and sustained investment in the Delta Science Plan will ensure that the responsible agencies have the knowledge, trust and collaboration necessary to achieve the coequal goals.

Delta Science Plan (2019)

Delta Stewardship Council (Delta Council) | May 23rd, 2019

A coordinated, science-based approach is essential for managing the Sacramento-San Joaquin Delta (Delta) to achieve the vision of One Delta, One Science and further the

A coordinated, science-based approach is essential for managing the Sacramento-San Joaquin Delta (Delta) to achieve the vision of One Delta, One Science and further the coequal goals in a manner that enhances and protects the Delta as an evolving place. As members of the 18 federal and state agencies composing the Delta Plan Interagency Implementation Committee (DPIIC), we recognize that we must avoid a siloed, single-interest approach to management and science issues in the Delta. Such an approach hampers effective management and efficient resource use to address complex issues including increasing risks from climate change related effects such as sea level rise, prolonged dry periods, and floods. Our focus must be twofold: a more integrated effort among federal and state agencies and stakeholders to advance Delta-relevant scientific knowledge and using that knowledge to inform decisions that address these complex natural resource management issues. The Delta Science Plan is a call to action for a more collaborative Delta science community that contributes to improving decision-making in the Delta. This document provides direction for collectively prioritizing research questions, setting goals, developing shared protocols for how science is conducted, and verifying and communicating scientific results with an eye towards usability for decision-makers and the public. This direction is only possible if the Delta science community, including members of DPIIC, work together to implement and conduct work consistent with the actions identified in the document and to speak with one voice to marshal support for scientific efforts. The members of DPIIC are committed to promoting and investing in coordinated and collaborative efforts that generate scientific knowledge to support both the Delta Plan and the objectives identified in the 2009 Delta Reform Act. This commitment has been expressed through DPIIC’s endorsement and acceptance of the Interim Science Action Agenda (2014), the High-Impact Science Actions (2015), and the Science Action Agenda (2017); documents that identify and prioritize collaborative science efforts. In endorsing the Delta Science Plan, we accept the document as a shared guide to build the collaborative science community and support efforts to work together in carrying out integrated actions that achieve the vision of One Delta, One Science.

Delta Vision Strategic Plan

State of California | October 17th, 2008

When it was created by Governor Schwarzenegger’s Executive Order S-17-06 in 2006, the charge of the Delta Vision Blue Ribbon Task Force (Task Force) was nothing less th

When it was created by Governor Schwarzenegger’s Executive Order S-17-06 in 2006, the charge of the Delta Vision Blue Ribbon Task Force (Task Force) was nothing less than to create a vision to repair the ecological damage to the Sacramento-San Joaquin River Delta (Delta), and then prepare a strategic plan which would sustain the Delta in future decades while ensuring a reliable water supply for the two-thirds of California’s population who depend in whole or in part on water from the Delta.

Delta Vision Strategic Plan -- from Phil Isenberg, 1939-2023

State of California | October 17th, 2008

When it was created by Governor Schwarzenegger’s Executive Order S-17-06 in 2006, the charge of the Delta Vision Blue Ribbon Task Force (Task Force) was nothing less th

When it was created by Governor Schwarzenegger’s Executive Order S-17-06 in 2006, the charge of the Delta Vision Blue Ribbon Task Force (Task Force) was nothing less than to create a vision to repair the ecological damage to the Sacramento-San Joaquin River Delta (Delta), and then prepare a strategic plan which would sustain the Delta in future decades while ensuring a reliable water supply for the two-thirds of California’s population who depend in whole or in part on water from the Delta.

Department of Fish and Wildlife Scientific Integrity Policy

California Department of Fish and Wildlife (CDFW) | June 15th, 2017

In order to guide the scientific work by the Department and pursuant to Fish and Game Code Section 715(d), the Department adopts this scientific integrity policy, to ensu

In order to guide the scientific work by the Department and pursuant to Fish and Game Code Section 715(d), the Department adopts this scientific integrity policy, to ensure integrity and public confidence in our scientific work. This Scientific Integrity Policy (Policy) affirms the standards for high quality and ethical scientific inquiry within the Department. Given the vital role of science in the management of natural resources, the Department endeavors to maintain and strengthen its commitment to scientific information that is developed and used according to the highest professional standards. These efforts are essential to maintaining the confidence of the public and other stakeholders, and to enhance the reputation of the Department’s scientific programs, policies and staff. Furthermore, the Department is committed to providing an environment that encourages and supports the conduct, communication, and transparency of excellent science. In support of the above, this Policy is to be considered as the collective guiding principles for all scientific endeavors within the Department. The purposes of this Policy are: To foster the development and use of high quality scientific work that is used to inform policy and management within the Department as well as decisions of the Fish and Game Commission. To ensure that the public and decision makers have access to the scientific methodology and analyses behind the Department’s policy positions. This Policy is intended to provide overarching guidance through the standards and protocols listed below. Guidance documents may be added, changed or removed from the list by the Director (or designee), as needed to remain current and relevant.

Drought Attribution Studies and Water Resources Management

American Meteorological Society (AMS) | February 16th, 2023

Estuary-wide Data Repository for Delta Environmental Data to Understand a California Estuary Poster (2017)

San Francisco Estuary Institute (SFEI) | July 1st, 2017

The Sacramento-San Joaquin Delta (Delta) has some of the most pressing water supply and natural resource management issues facing California. The Delta Environmental Da

The Sacramento-San Joaquin Delta (Delta) has some of the most pressing water supply and natural resource management issues facing California. The Delta Environmental Data for the Understanding a California Estuary (DEDUCE), a collaborative project building upon the 2014 Environmental Data Summit vision, initiated a forum to integrate disparate data from multiple sources along with legacy data not uploaded to any of the State’s data-sharing systems. DEDUCE collected legacy toxic contaminant data from the Delta according to rigorous business rules, uploaded the data to the expanded estuary-wide data repository, and established design standards to exchange datasets with the California Environmental Data Exchange Network (CEDEN), a contributor to the US Environmental Protection Agency’s Water Quality Exchange (WQX). This data integration effort liberated accurate, accessible, and synthesized data for scientists and decision-makers as a foundation to inform management actions with the best available science

Estuary-Wide Data Repository for the Delta Environmental Data to Understand a California Estuary

San Francisco Estuary Institute (SFEI) | July 1st, 2017

The Sacramento-San Joaquin Delta (Delta) is the backdrop for some of the most pressing water supply and natural resource management issues facing California. To navigate

The Sacramento-San Joaquin Delta (Delta) is the backdrop for some of the most pressing water supply and natural resource management issues facing California. To navigate such matters comprehensively with transparency, and rigor, it is important to ensure broad dissemination of data. An Environmental Data Summit held in 2014 created a new era in information management and knowledge discoveries, and shed light on challenges associated with the use of disparate datasets. The Delta Environmental Data for the Understanding a California Estuary (DEDUCE), a collaborative project, builds upon the Data Summit vision and initiated a forum to integrate disparate data from multiple sources and legacy data that are currently not in any of the State’s data sharing systems. DEDUCE expanded the existing infrastructure to house water quality data from the Delta to address management questions by identifying and collecting high priority data according to rigorous business rules and mapping these data to a central system. This important step of harmonizing the data improves its interoperability and increases the access to and exchange of high-quality environmental data. DEDUCE facilitates the upload, aggregation and display of data in tools such as those created under the auspices of the California Water Quality Monitoring Council, including EcoAtlas and My Water Quality Portals, and CD3: Contaminant Data Display and Download tool for accessing and visualizing data comparable to State standards. DEDUCE achieved collecting and uploading the legacy and toxic contaminant data, and established design standards to exchange future datasets from the initial data storage or database to California Environmental Data Exchange Network (CEDEN). This data integration effort created accurate, accessible, and synthesized data for scientists and decision-makers as a foundation to inform management actions with the best available science.

Exit here: Strategies for dealing with aging dams and reservoirs

Aquatic Sciences (Springer) | October 22nd, 2019

Aging infrastructure is prevalent throughout the world, but water control management structures, specifically dams, are of growing concern. Dams and their corresponding r

Aging infrastructure is prevalent throughout the world, but water control management structures, specifically dams, are of growing concern. Dams and their corresponding reservoirs have inherent, but separate, lifespans. The proportion of dams around the world that continue operation beyond their intended lifespans is growing at an alarming rate. Society will not only have to navigate the tradeoffs associated with the deterioration of services provided by reservoirs and dams, but also impending structural failures. Society is nearing a critical pinch point where we will have to decide how to deal with dams and reservoirs at scales that range from a single system to multiple systems in large watersheds. No comprehensive strategy exists to inform both the range of actions that can be applied to such infrastructure and how such actions would influence biophysical, socioeconomic, and geopolitical tradeoffs. The development of proactive exit strategies is a critical first step in ensuring controlled transitions for aging dams and reservoirs. Herein, we present an overview of actions and considerations for aging dams and reservoirs, followed by an initial framework for exit strategy development to launch a further discussion on how society could deal with this aging infrastructure.

Fish-Habitat Relationships Along the Estuarine Gradient of the Sacramento-San Joaquin Delta, California: Implications for Habitat Restoration

Estuaries and Coasts (Springer) | June 6th, 2018

Estuaries are highly variable environments where fish are subjected to a diverse suite of habitat features (e.g., water quality gradients, physical structure) that filt

Estuaries are highly variable environments where fish are subjected to a diverse suite of habitat features (e.g., water quality gradients, physical structure) that filter local assemblages from a broader, regional species pool. Tidal, climatological, and oceanographic phenomena drive water quality gradients and, ultimately, expose individuals to other habitat features (e.g., stationary physical or biological elements, such as bathymetry or vegetation). Relationships between fish abundances, water quality gradients, and other habitat features in the Sacramento-San Joaquin Delta were examined as a case example to learn how habitat features serve as filters to structure local assemblages in large river-dominated estuaries. Fish communities were sampled in four tidal lakes along the estuarine gradient during summer-fall 2010 and 2011 and relationships with habitat features explored using ordination and generalized linear mixed models (GLMMs). Based on ordination results, landscape-level gradients in salinity, turbidity, and elevation were associated with distinct fish assemblages among tidal lakes. Native fishes were associated with increased salinity and turbidity, and decreased elevation. Within tidal lakes, GLMM results demonstrated that submersed aquatic vegetation density was the dominant driver of individual fish species densities. Both native and non-native species were associated with submersed aquatic vegetation, although native and non-native fish populations only minimally overlapped. These results help to provide a framework for predicting fish species assemblages in novel or changing habitats as they indicate that species assemblages are driven by a combination of location within the estuarine gradient and site-specific habitat features.