Sacramento–San Joaquin Delta – California Water Library

Page

Showing
351-361 of 1080

Per Page

Sort By

Delta Landscapes Executive Summary

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

Summary

The Sacramento-San Joaquin Delta supplies freshwater to a large portion of California’s cities and agriculture, supports an agricultural economy and culture, and is hom

The Sacramento-San Joaquin Delta supplies freshwater to a large portion of California’s cities and agriculture, supports an agricultural economy and culture, and is home to native wildlife found nowhere else in the world. This complex region is hampered by many environmental challenges, including an over-allocated water supply, invasive species, water quality problems, novel ecosystems that no longer support desired functions, aging infrastructure, and a complex management structure. Beyond these challenges, sea level rise, other impacts from climate change, and earthquakes pose significant risks to Delta ecosystems, agriculture and water supply. There is general consensus that ecosystem restoration and planning for future resilience needs to take place, within the context of the Delta’s unique culture and economy. Imagining a healthy Delta ecosystem in the future and taking bold, concrete steps toward that future requires an understanding and vision of what that healthy ecosystem could look like. For a place as extensive, unique, and modified as the Delta, critical knowledge can be acquired through the study of the past, investigating the Delta as it existed just prior to the substantial human modifications of the past two centuries. Though the Delta is irrevocably altered, its history is still relevant. Underlying geologic and hydrologic processes still influence the landscape. Native species adapted to live in the historical ecosystems, so restoring functional landscapes that reflect historical patterns can increase the success of restoration efforts. The Delta Landscapes project investigates the historical ecosystems of the Delta and how they have been modified in the current landscape in order to produce a holistic, aspirational approach to restoration of desired ecological functions. The project goes beyond immediate planning horizons and mandated protection of particular species to explore how restoration of large-scale processes of sediment and water could drive a broad suite of ecological benefits. Restoration or emulation of such processes requires large areas and long time scales. The Delta Landscapes project produced three reports, summarized here, that speak to the past, present, and potential future Delta. The final report, A Delta Renewed, provides a framework for how individual projects planned in the near-term can contribute to a coherent, long-term vision of improving ecosystem function across the Delta. The purpose of this planning framework is to foster more effective and economical restoration of desired functions in a smaller footprint, because each project is contributing to improving a larger system, than could be achieved by projects planned in isolation that each focus on more narrow, varied benefits. The project is purposefully conceived to address only ecological benefits, in the context of a working agricultural landscape with critical water-supply and cultural considerations. The reports can contribute to discussions where social and economic benefits are also evaluated in planning the future Delta landscape. A Delta Renewed User Guide was developed to help different audiences access the information in this report and apply it effectively. This research was conducted at the request of the California Department of Fish and Game (CDFG) and the Ecosystem Restoration Program (ERP).

View Document Download Now Email

Delta Landscapes: A Delta Renewed User Guide

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

Summary

A Delta Renewed User Guide aims to increase the accessibility of the technical findings in A Delta Renewed for easier application to restoration and conservation efforts

View Document Download Now Email

Delta Levee Investment Strategy: Final Report

Delta Stewardship Council (Delta Council) | August 4th, 2017

Summary

In the California Sacramento-San Joaquin Delta (Delta), levee failure could cause catastrophic flooding, potentially causing injury or loss of life, and possibly damaging

In the California Sacramento-San Joaquin Delta (Delta), levee failure could cause catastrophic flooding, potentially causing injury or loss of life, and possibly damaging property, water supply, infrastructure, and environmental resources of importance to the entire State of California (State). Though levee maintenance and improvements over the past three decades have reduced the frequency of levee failures, the State has no comprehensive method to prioritize its investments in Delta levees operations, maintenance, and improvement projects. The Delta Plan, adopted on May 16, 2013, recommends that the Delta Stewardship Council (Council), in consultation with the California Department of Water Resources (DWR), the Central Valley Flood Protection Board (CVFPB), the Delta Protection Commission (DPC), local agencies, and the California Water Commission, implement California Water Code (CWC) section 85306 by developing a Delta Levees Investment Strategy (DLIS) to identify funding priorities for State investments in Delta levees. The DLIS is an innovative approach for determining priorities for State funds for levee improvement in the Delta and Suisun Marsh. The DLIS, which considers the assets protected by levees, the threats to levees, and the multiple beneficiaries of levee investments, uses a risk analysis methodology to recommend priorities for State investments in levee operations, maintenance, and improvements. This methodology was developed in close coordination with State agency partners, local and regional flood management and emergency response planning agencies, and other interested parties. In total, the Council worked with 113 different stakeholders and conducted 10 public meetings, 60 stakeholder outreach meetings, and 60 interagency coordination meetings. The Council also discussed DLIS issues at 38 Council meetings and workshops, which provided opportunities for public comment. The DLIS team developed a Decision Support Tool (DST) to enable the Council and stakeholders to review and update the data and analysis that form the basis of the risk evaluation. The DST supports deliberations by summarizing information about baseline and future risks, aggregating and displaying risks, and then identifying portfolios of investments that have the potential to reduce risk to State interests. The data components in the DST are designed to be updated as new information is collected or identified.

View Document Download Now Email

Delta Levee Investment Strategy: Risk Analysis Methodology

Delta Stewardship Council (Delta Council) | July 20th, 2016

Summary

Levees in California’s Sacramento-San Joaquin Delta (Delta) reduce flood risk to people, property, natural resources, and infrastructure systems of statewide importance

Levees in California’s Sacramento-San Joaquin Delta (Delta) reduce flood risk to people, property, natural resources, and infrastructure systems of statewide importance. Levee failure (such as a levee breach) could cause devastating flooding, potentially resulting in injury or loss of life, damage to property and infrastructure, disruption of water supply, and harm to environmental resources of statewide significance. Currently, the State of California (State) does not have a long-term strategy to guide future investments of its limited funding for Delta levees. The 2009 Delta Reform Act directed the Delta Stewardship Council (Council) to lead the effort to develop and recommend priorities for State investments in Delta levees to reduce flood risks and to advance the coequal goals of water supply reliability and restoring the Delta ecosystem. Working closely with other agencies and the public, the Council is developing a Delta Levees Investment Strategy (DLIS) to establish priorities for State investments in the Delta levee system. Risk, the potential for an unwanted outcome, is a principal factor in establishing priorities for State investments in levees. Specifically, risk is the probability that an adverse event (such as a flood or earthquake) will occur multiplied by the consequences of that event: Risk = Probability x Consequences As presented in this report, the DLIS is based on a comprehensive methodology that quantifies risk by considering the threats to Delta levees and the assets protected by Delta levees. The DLIS also considers the multiple beneficiaries of Delta levee investments. Building on the results of previous Delta levee planning efforts, the DLIS collects and uses the best available existing data and information from numerous sources to evaluate risks to State interests in the Delta as defined by risk to public safety; property and infrastructure; water supply reliability; the Delta ecosystem; and the unique attributes of the Delta as an evolving place. The DLIS evaluates those risks under current and potential future conditions. In early 2015, the DLIS team prepared an Interim Progress Report summarizing the work conducted during the first 9 months of the DLIS project. The report focused primarily on the methodologies planned for implementing the DLIS project to facilitate a “mid-course” review by an independent science panel, which completed its work in July 2015. Panel members offered comments for improvement and concluded that the “overall methodology of using existing data, identifying important metrics, aggregating results, and making comparisons across islands is conceptually sound” (Mitchell et al. 2015). The DLIS project includes outreach to State and local agencies, concerned stakeholders in the Delta, knowledgeable technical resources, owners and operators of Delta infrastructure, and Delta leaders and residents. The final methodologies employed in the DLIS project are reported herein and incorporate the input from the independent science panel as well as feedback and comments resulting from the outreach efforts.

View Document Download Now Email

Delta Levees – Types, Uses, and Policy Options

Delta Vision Blue Ribbon Task Force (Delta Vision) | August 7th, 2008

Summary

This document was developed to support Delta Vision discussions on the role of levees in the Delta’s future. It is to clarify the different types (or design standards)

View Document Download Now Email

Delta Levees Investment Strategy: Sea Level Rise Methodology

Delta Stewardship Council (Delta Council) | August 21st, 2015

Summary

This memorandum describes the methodology used to account for the impact of potential future sea level rise on the Delta Levees Investment Strategy (DLIS) metrics and how

View Document Download Now Email

Delta Narratives: Saving the Historical and Cultural Heritage of the Sacramento-San Joaquin Delta

Delta Protection Commission (DPC) | August 1st, 2015

Summary

From August 2014 through July 2015, the Delta Narratives project, on contract to the Delta Protection Commission, addressed two questions. First, in what ways does the hi

From August 2014 through July 2015, the Delta Narratives project, on contract to the Delta Protection Commission, addressed two questions. First, in what ways does the historical experience of the Sacramento-San Joaquin Delta contribute to an understanding of key themes in regional and American history? Second, how might Delta stories gain wider appreciation within the region, throughout Northern California, and among people in the rest of California and beyond? Scholars on the project team documented ways the history of the Delta illustrates trends in land management and reclamation, technological shifts in transportation and agriculture, the impact of ethnicity and labor specialization on community building, and finally, the shifting visioning of America's promise and fall from grace by artists and writers in response to the intense cultivation of the Delta and the conditions which workers there endured. Their essays testify to the intrinsic value of Delta stories and to the additional perspectives they bring to regional and national history. With these essays in hand, the project team investigated the current infrastructure for the preservation and dissemination of historical and cultural information in the Delta. It created a directory of institutions committed to promoting Delta stories. In order to stimulate conversations between these stakeholders, the team organized two workshops at which the scholars and archivists shared insights and invited commentary and conversation. Subsequently, with the support of the Center for California Studies at Sacramento State University, a conference entitled “More than H2O: Saving the History and Culture of the Sacramento-San Joaquin Delta” presented findings and discussed strategies with an audience of state and local stakeholders. Delta Narratives culminated with a conference organized around an American Assembly model. The conference generated a list of suggestions for further action regarding the recognition, preservation, and dissemination of Delta stories. High on the list of initiatives were adequate mapping of historically significant locations, an organization that would draw together the many cultural and historical groups in the Delta toward common action, the initiation of annual Delta Days to celebrate the region, and the creation of educational materials including web applications (apps), and a website devoted to the region.

View Document Download Now Email

Delta Narratives: Building Communities – Economics & Ethnicity

Delta Protection Commission (DPC) | June 1st, 2015

Summary

The theme of this Delta Narrative is Building Communities: Economics and Ethnicity. The essay focuses on the primary zone of the Delta, comprising the “Delta proper”

View Document Download Now Email

Delta Narratives: Literature and Visual Arts of the Delta, 1849-1975

Delta Protection Commission (DPC) | June 1st, 2015

Summary

Stories matter. Contemporary neuroscience fairly certainly supports our basic intuition that individual human beings construct their identities out of stories, and wha

View Document Download Now Email

Delta Narratives: Managing the Garden: Agriculture, Reclamation, and Restoration in the Sacramento -San Joaquin Delta

Delta Protection Commission (DPC) | August 5th, 2015

Summary

This paper examines land and water use in the Delta from before European contact in 1769 to the beginning of the twenty-first century. The focus lies, first, on the ecolo

This paper examines land and water use in the Delta from before European contact in 1769 to the beginning of the twenty-first century. The focus lies, first, on the ecological transformation of the region during the late eighteenth and early nineteenth century from a tidal wetland to an engineered, reclaimed agricultural landscape, as well as on some of the individuals most responsible for that transformation and, second, on more recent environmental conditions in the Delta, especially water quality issues, and on the restoration of wetlands around the Delta’s margins. This paper begins with the Delta’s geological origins, and then discusses how Native Americans used and modified the land, and accounts for the activities of Spanish, Mexican, and early Anglo explorers in the region, as well as the consequences of those activities for indigenous peoples. It then traces the various stages of Delta reclamation from the time of California statehood, beginning with Swamp and Overflowed Lands Act of 1850. It examines the challenges of levee building, which was carried out at first by hand largely by Chinese laborers, and later by mechanized equipment, most notably clamshell dredges. Once reclaimed, Delta mineral and peat soils yielded a wide variety of agricultural products, including potatoes, grains, asparagus, sugar beets, and orchard fruits, among others, which are discussed in some detail. This paper also examines the history of salmon fishing and canning in the Delta before turning more broadly to the twentieth-century federal and state water projects that have affected the Sacramento and San Joaquin rivers in different ways and that at various times have both improved and degraded water quality in the Delta. It concludes by coming full circle to late-twentieth century conservation efforts that have aimed to restore parts of the Delta and that have led to the creation of a variety of state, federal, and other protected lands, primarily along the Delta’s fringes, even while the heart of the Delta continues to grapple with seemingly intractable issues of water quality and water conveyance.

View Document Download Now Email

← Prev

Page : 36

Delta Landscapes Executive Summary

Delta Landscapes: A Delta Renewed User Guide

Delta Levee Investment Strategy: Final Report

Delta Levee Investment Strategy: Risk Analysis Methodology

Delta Levees – Types, Uses, and Policy Options

Delta Levees Investment Strategy: Sea Level Rise Methodology

Delta Narratives: Saving the Historical and Cultural Heritage of the Sacramento-San Joaquin Delta

Delta Narratives: Building Communities – Economics & Ethnicity

Delta Narratives: Literature and Visual Arts of the Delta, 1849-1975

Delta Narratives: Managing the Garden: Agriculture, Reclamation, and Restoration in the Sacramento -San Joaquin Delta

Filter Results

Type

Topic

Keywords

Publisher

Basin

Hydrological Region

Search for:

Search the California Water Library

Type

Topic

Keywords

Hydrological Region

Basin