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DWR Publications

Every year, the Department of Water Resources issues technical bulletins, reports, and other publications and media documenting the measurement, protection, use, and management of California's water resources. This DWR Publications Repository is a partial and growing list of the publications and other media produced and distributed by the Department.

In this list you find a variety of types of publications and other media ranging from print material, to audio and video files. If the publication or other media is available in electronic format, a link will point to the appropriate electronic file. In many cases, publications are only available in hardcopy and cannot be downloaded. A contact phone number and email will be provided for cases where an electronic download is not available.

Please use the Comments or Suggestions link in the footer to request an accessible version of text-based documents.

If you are searching for a particular publication or media item, and cannot find it, for more information, please contact:
State of California
Department of Water Resources
Bulletins and Reports
P.O. Box 942836, Sacramento, CA 94236-0001
or
1416 Ninth Street, Third Floor
Sacramento, CA 95814
(916) 653-1097

In addition to this Publications Repository, the Department of Water Resources publications, including those that are now out-of-print, are distributed to many California libraries and to libraries in other states and the District of Columbia. WorldCat.org is a useful web site to search library collections in your community and thousands more around the world.

http://www.worldcat.org/ (Link will open in a new browser window.)
(Sort Alphabetically or by Most Recent Publish Date)

Toggle Image 2008 Boundaries of Public Water Agencies, San Joaquin Valley 2008 (PDF, 7.78 MB)
Description: The Department of Water Resources provides a detailed map of public water agencies and their boundaries within the San Joaquin Valley.
Toggle Image 2013 Boundaries of Public Water Agencies, San Joaquin Valley 2013 (PDF, 6.07 MB)
Description: The Department of Water Resources provides a detailed map of public water agencies and their boundaries within the San Joaquin Valley.
Toggle Image A Guide to Estimating Irrigation Water Needs of Landscape Plantings in California, WUCOLS 08/01/2000 (PDF, 4.00 MB)
Description: The Landscape Coefficient Method (LCM) describes a method of estimating irrigation needs of landscape plantings in California. It is intended as a guide for landscape professionals. It includes information that is based on research and on field experience (observation). Readers are advised that LCM calculations give estimates of water needs, not exact values, and adjustments to irrigation amounts may be needed in the field.
Toggle Image All Water Projects and Rivers Informational Maps 05/01/2000 (JPG, 32 KB)
Description: This relief map of California shows all of the rivers and various water projects that comprise the water delivery system for California. The nature of California's geography, climate, and the location of its population, industry and agriculture have all influenced the State's development and the creation of water storage and distribution projects.
Toggle Image Alturas Groundwater Basin Water Quality Study 1986 (PDF, 5.38 MB)
Description: The principal objective of the investigation leading to this report was to update knowledge of water quality of the Alturas Ground Water Basin in south-central Modoc County. The basin encompasses an area of about 135 square miles, and contains approximately 7.5 million acre-feet of groundwater in storage to a depth of 800 feet.
Toggle Image Antelope Lake Bathymetric Survey 1998 1998 (PDF, 1.56 MB)
Description: Anderson, Curtis. Antelope Lake Bathymetric Survey. Memorandum to Dave Bogener, dated July 15, 1998. 65 pp.
Toggle Image Antelope Reservoir Sedimentation Survey 1990 05/15/1990 (PDF, 8.19 MB)
Description: Gentry, Wayne S. 1990. Antelope Reservoir Sedimentation Survey. Memorandum to Clayton Magonigal, Chief, Water Operations Branch, division of Operations and Maintenance. 34 pp. + 9 pp of appendices/attachments.
Toggle Image California Strategic Growth Plan: Flood Control, Water Supply & Conveyance (2008) 2008 (PDF, 136 KB)
Description: As a result of the Governor’s emergency declaration for California’s levee system in February 2006 and funding provided by the Legislature in the 2006-07 Budget, key repairs to 33 critical erosion sites protecting Central Valley communities were completed in record time. The state is now advancing funds and working with the federal government to repair 71 additional levee erosion sites damaged in the floods of 2006. An unprecedented effort to evaluate 350 miles of urban levees and 1,250 miles of non-urban levees for hidden defects has begun, and the state is leading a coordinated effort involving federal and local agencies to avoid a major flood disaster in California. California must expand its water management and delivery system, including surface storage, groundwater storage and conveyance facilities. In this phase...
Toggle Image Castaic Lake (West Branch) 11/01/2007 (PDF, 460 KB)
Description: Located in Southern California, Castaic Lake is the terminal reservoir on the West Branch of the State Water Project. Castaic Lake and Castaic Lagoon, with their wide variety of water sports, are popular with Southern Californians.
Toggle Image Clear Lake Water Quality Data 10/01/1975 (PDF, 13.26 MB)
Description: The Department of Water Resources conducted a number of studies on Clear Lake from 1968 to 1973 and has collected a large volume of water quality and related data, presented in this report.
Toggle Image Colusa Basin Drain Water Quality Literature Review Memorandum Report 04/01/1990 (PDF, 2.60 MB)
Description: This report presents a literature review of water quality in the Colusa Basin Drain (CBD), identifies potential impacts of alternatives to control flooding and drainage in the CBD, and recommends further study needs with respect to water quality in the CBD.
Toggle Image DWR News People Summer 2004 06/01/2004 (PDF, 882 KB)
Description: DWR NEWS/People magazine was created with the Winter 2004 edition, and is a combination of DWR NEWS magazine and DWR People newsletter. This quarterly magazine contains information about DWR activities and employees.
Toggle Image Deer Creek Water Quality Investigation 1997-2000 10/01/2008 (PDF, 9.75 MB)
Description: This report summarizes the results of water quality monitoring and special studies conducted from 1997 to 2000 by the Northern District Water Quality and Biology Section within the Deer Creek watershed in Tehama County, California.
Toggle Image Eagle Lake Alternative Plans for Controlling Lake Levels 11/01/1972 (PDF, 4.30 MB)
Description: 'DWR, in cooperation with the State Division of Highways, undertook a study to evaluate the rising water level of Eagle Lake, which had begun to threaten lakeside development and investigate the possibility of improving the lake environment by various operational plans.
Toggle Image Enlarged Shasta Reservoir Study Water Quality Summary 1986 (PDF, 9.84 MB)
Description: The Northern District was responsible for identifying study needs and developing and conducting water quality and biological studies to allow evaluation of the ecosystem alterations from the proposed enlargement of Shasta Reservoir. The study rationale and proposal are included with this report.
Toggle Image Evaluation of a Revised Operation for Antelope Reservoir 10/01/1981 (PDF, 16.41 MB)
Description: Evaluation of a revised operation for Antelope reservoir.
Toggle Image Federal Water Projects Informational Maps 05/01/2000 (JPG, 32 KB)
Description: This relief map of California shows water projects managed by the US Bureau of Reclamation for the water delivery system for California. The nature of California's geography, climate, and the location of its population, industry and agriculture have all influenced the State's development and the creation of water storage and distribution projects
Toggle Image Final EIR for Revocation of Certificate of Approval for Misselbeck Dam and Reservoir 12/01/1990 (PDF, 6.57 MB)
Description: Final EIR for Revocation of Certificate of Approval for Misselbeck Dam and Reservoir
Toggle Image Final EIR for the Simulation of Natural Flows in the Middle Piru Creek 2005 (PDF, 9.60 MB)
Description: Final EIR for the Simulation of Natural Flows in the Middle Piru Creek, prepared by Aspen Environmental Group for the Department of Water Resources.
Toggle Image Historic Sacramento River Temperature Data, Keswick to Butte City Memorandum Report 04/01/1990 (PDF, 7.25 MB)
Description: This report is a compilation of historic Sacramento River water temperature data from Keswick Reservoir to Butte City through 1989.
Toggle Image Honey Lake Water Quality Investigation 06/14/1968 (PDF, 1.28 MB)
Description: The Northern District's groundwater data program detected increasing amounts of arsenic in various wells in Honey Lake Valley, Lassen County in 1967. The water quality unit of Northern District initiated an investigation to define the area of impaired water and locate the possible sources of impairment. This memorandum report gives the results of the investigation.
Toggle Image IEP - 2002.0522 Science Advisory Group May 22, 2002 Review of Environmental Monitoring Program 05/22/2002 (PDF, 204 KB)
Description: A core element of the Interagency Ecological Program (IEP) is the Environmental Monitoring Program (EMP), mandated by the State Water Resources Control Board to document the changing status of water quality and biological communities in the Sacramento-San Joaquin River Delta and downstream embayments of San Francisco Bay. Sustained, uninterrupted operation of the EMP for over 30 years is a remarkable achievement that in many ways serves as a model of successful state-federal partnership in environmental monitoring, providing one of the longest and most valuable records of combined water quality-biological monitoring in the U.S. Members of the IEP Science Advisory Group (SAG), including outside specialists recruited for the EMP technical review, unanimously endorsed the Environmental Monitoring Program.
Toggle Image IEP - 2003.0807 EMP Response to 2002 IEP SAG Review 08/07/2003 (PDF, 1.53 MB)
Description: The IEP Science Advisory Group (SAG) provided an independent scientific review of the IEP Environmental Monitoring Program (EMP) as part of this program’s 2001-2002 comprehensive programmatic review. Here, the EMP review core team (including Wim Kimmerer) provides a written response to the SAG review dated May 22, 2002. The core team is particularly thankful for SAG comments regarding the basis for the EMP. These comments led to an intense and productive exploration of program aims and the conceptual basis for the EMP sampling design, yielding a much improved basis for the program and sampling design. As its “primary recommendation,” the SAG called for the EMP to focus on rapidly turning data into useful products by increasing the program’s "human intellectual investment" and working with outside researchers.
Toggle Image IEP - 2004.1201 Long-term Fish Monitoring Program Element Review 12/01/2004 (PDF, 2.79 MB)
Description: In spring 2004, we initiated a review of the Interagency Ecological Program fish monitoring program elements on behalf of the IEP Management Team. These elements constitute a substantial portion of IEP’s overall monitoring efforts. They represent some of IEP’s longest standing monitoring elements (also referred to as surveys) collecting data used for decades by scientists and resource managers throughout the San Francisco Estuary. As requested, this is a programmatic review to assemble relevant information that can help in the ongoing management and implementation of IEP. In addition, IEP management expects to use this information in decisions about performing more in-depth reviews of program elements and in setting overall program priorities and resource commitments.
Toggle Image IEP - 2006.0505 Delta Smelt Review-Science Advisory Group Report 05/05/2006 (PDF, 78 KB)
Description: On April 13/14, the IEP Science Advisory Group (SAG) met with IEP staff to review the current IEP effort monitoring and studying delta smelt. The purpose of this meeting was to examine current sampling programs and strategies with regard to their utility and value towards understanding what factors influence the health, i.e. the abundance, of delta smelt populations, and hence towards managing water project operations in the Delta that affect delta smelt. This report summarizes the key findings that the SAG believes deserve the most attention by IEP, including: 1. Delta smelt review epitomizes what IEP can and should accomplish.; 2. The power of collaboration; 3. Existing monitoring program needs to be continued with wome critical re-evaluation; 4. Use of data in management actions; 5. It's more of a POD than just a delta smelt issue.
Toggle Image IEP - 2006.0505.2 Science Advisory Group Report on the SAG's 2005-2006 Programmatic Review of IEP's Delta Smelt Program 05/05/2006 (PDF, NA)
Description: This document is comprised of two distinct but interrelated parts: (1) An independent review by the Scientific Advisory Group (SAG) of the Interagency Ecological Program’s delta smelt work that includes the SAG’s recommendations for improving the work and; (2) The IEP’s draft response to the findings and recommendations contained in the SAG Report. The SAG Report appears in its unaltered original font and formatting and the IEP draft responses to each recommendation are shown in bold. Cited references appear at the end of this document. The purpose was to examine current sampling programs and strategies with regard to their utility and value towards understanding what factors influence the health, i.e. the abundance, of delta smelt populations, and hence towards managing water project operations in the Delta that affect Delta Smelt.
Toggle Image IEP - 2008.0404 Moving the Interagency Ecological Program Into the Future, CALFED ISB, April 4, 2008 04/04/2008 (PDF, NA)
Description: As part of its mandate to oversee the quality and use of Science in the Bay-Delta system, the CALFED Independent Science Board (ISB) has been conducting a broad review of the Interagency Ecological Program (IEP). The goal of this effort is to promote innovation in and modernization of the program as well as integration with efforts outside of the Delta. Most importantly, the ISB feels strongly that on-going planning efforts such as Delta Vision and the Bay-Delta Conservation Plan must begin incorporating monitoring and research in general, and the IEP specifically, into their strategic planning. We encourage you, as IEP Directors, to engage with Delta Vision, BDCP and the CALFED Science Program in this regard.
Toggle Image IEP - 2008.0717 Response to CALFED ISB report "Moving the IEP into the Future" 07/17/2008 (PDF, 1.53 MB)
Description: This is a response to a April 4, 2008 letter to the Interagency Ecological Program (IEP) Directors regarding the CALFED Independent Science Board's (ISB) recommendations for the Future. Some of the ISB's recommendations are related to activities the IEP already performs, or that it could accomplish through its existing governance structure and funding sources. These include expanding data analysis and publications capabilities; increasing integration and collaboration with other monitoring and research programs within and outside the Delta; strategically analyzing current monitoring efforts, including protocols and locations; and increasing periodic, independent review of program elements and assessing the program's response to those review. Other ISB recommendations are beyond the current IEP scope and the BDCP may be able to help.
Toggle Image Indian Creek Flow Study TIR 81-2 (1976) 06/01/1981 (PDF, 4.77 MB)
Description: Indian Creek Flow Study. Northern District Technical Information Report No. 81-2. Department of Water Resources. 18 pp. and Appendices
Toggle Image Indian Creek Water Quality Survey 1980 (PDF, 1.81 MB)
Description: Boles, Gerald. 1980. Indian Creek Survey. (Water Quality Sampling at Antelope Reservoir, Indian Creek, and Little Grizzly Creek on September 28, 1979). Memorandum to Ralph Hinton. 11 pp.
Toggle Image Irrigation of Twelve Million Acres in the Valley of California 1919 (PDF, 452 KB)
Description: This remarkable 13-page plan, written in 1919 by a retired USGS employee working out of the University of California, contains the broad outline on today's water system in California. It provides the strategy employed for the official 1930 State Water Plan.
Toggle Image Joint EIS/EIR Prototype Project to Augment Snowpack by Cloud Seeding 09/01/1990 (PDF, 11.85 MB)
Description: This report reviews the potential impacts to the environment of a proposed ground-based propane cloud seeding operation in Plumas and Sierra Counties.
Toggle Image Klamath River Water Quality Study Hamburg to Orleans 03/01/1987 (PDF, 11.79 MB)
Description: This study, which was conducted from May 1984 to January 1986, was undertaken to investigate the water quality of the Klamath River between Hamburg and Orleans, a remote, little-used reach of the river. This report, which describes the geology, climate, level of development, and water supply of the study area, sets forth prevailing hydrologic conditions, summarizes water quality data, and provides findings and conclusions of the investigation.
Toggle Image Lake Perris 09/01/1997
Description: The SWP’s southernmost reservoir is explained in this publication, which also discusses the benefits it provides such as water storage and fish and wildlife enhancement. Lake Perris is also one of the most heavily used recreational lakes in the State Park system.
This publication is not available electronically. To inquire further, please contact:
Publications Clerk at (916) 653-1097 or imr-publications@water.ca.gov.
Toggle Image Local Water Projects Informational Maps 05/01/2000 (JPG, 34 KB)
Description: This relief map of California shows the various local water projects that are part of the water delivery system for California. It includes aqueducts in Mokelumne, Hetch Hetchy, Los Angeles and on the Colorado River. The nature of California's geography, climate, and the location of its population, industry and agriculture have all influenced the State's development and the creation of water storage and distribution projects.
Toggle Image Major Rivers Informational Maps 05/01/2000 (JPG, 30 KB)
Description: This relief map of California shows the major rivers in the water delivery system for California . The nature of California's geography, climate, and the location of its population, industry and agriculture have all influenced the State's development and the creation of water storage and distribution projects.
Toggle Image Merced River Salmon Habitat Enhancement Project Phase II - Ratzlaff Reach, Spring 2001 Geomorphic Monitoring Report 03/27/2002 (PDF, NA)
Description: This report summarizes the monitoring activities on the Ratzlaff Reach during the years 2000 and 2001. The project was originally constructed in 1999 and is subject to an ongoing monitoring program and periodic reporting.
Toggle Image Mercury Contamination in Fish from Northern California Lakes and Reservoirs 07/01/2007 (PDF, 387 KB)
Description: Mercury Contamination in Fish from Northern California Lakes and Reservoirs
Toggle Image Napa River Trial Distribution Program 1998 Frost Season 02/01/1999 (PDF, 67 KB)
Description: This report describes the watermaster service provided by the Department of Water Resources under the Agreement for Trial Distribution on the Napa River during the 1998 frost season.
Toggle Image Pesticide Monitoring of Surface Waters in the Northern District Memorandum Report, 04/01/1990 (PDF, 2.74 MB)
Description: The purpose of this investigation was to determine the extent of pesticide monitoring of surface waters in Northern California, and to determine additional monitoring requirements. The study area includes the 13 counties of Northern District and those monitoring stations within Sutter and Yolo Counties that are located on the Sacramento River and its major drainages.
Toggle Image Pit River Water Quality Study 12/01/1992 (PDF, 14.06 MB)
Description: This study was designed to help manage the Pit River, manage its beneficial uses, and plan for future conjunctive ground and surface water uses. The study presents information to help develop objectives for water quality control.
Toggle Image Provident Irrigation District, Phase I Conjunctive Use Study 09/16/1996 (PDF, 6.85 MB)
Description: This report discusses the land and water use, the present surface and groundwater distribution system, hydrogeology, and results of aquifer tests.
Toggle Image Pyramid Lake (West Branch) 05/01/2000 (PDF, 271 KB)
Description: This brochure describes Pyramid Lake, located along Interstate 5 in northern Los Angeles County. The lake provides water storage, flood protection, and recreation for Southern California. Part of it can be seen from Vista del Lago Visitors Center, one of DWR’s three information centers.
Toggle Image Quail Lake (West Branch) 07/01/1997 (PDF, 827 KB)
Description: The smallest of SWP lakes, Quail Lake was created by a cataclysmic movement of the San Andreas fault. It was enlarged to move water across the infamous fault and now serves to regulate water storage for power generation at Warne Powerplant.
Toggle Image Quality of Ground and Surface Waters in the North Coastal Area Office Report 11/01/1964 (PDF, 7.34 MB)
Description: The purpose of this study was to determine the mineral quality of surface and ground waters in the Trinity, Mad-Redwood, and Eel hydrographic units and to identify any significant water quality problems that may affect future development of these units.
Toggle Image Review of the Bay Program by the Science Advisory Group 10/01/1999 (PDF, 49 KB)
Description: The SAG had several comments and recommendations for the IEP, with regard to the Bay Program: I. Fisheries and macroinvertegrate monitoring is extremely important and should be continued; II. Both people and funding resources have been diverted from the Bay program by competing demands for DFG expertise. This diversion of resources has been to the detriment of the program. A renewed commitment to the program is needed. III. The SAG identified 4 goals that have guided the program. These goals should be consulted frequently to make sure that the program is on focus. IV Data collection and enumeration of fishes has dominated the first 20 years of the program and this monitoring must continue, but the program must also evolve with increased resources for analysis and synthesis to explain the mechanisms behind the patterns observed.
Toggle Image Sacramento River Recreation Survey 08/01/1982 (PDF, 16.77 MB)
Description: This survey assess the recreational use of the river and to provide a basis for evaluating the impact of water management and development proposals.
Toggle Image Sacramento River Water Quality and Biology (Keswick Dam to Verona) A Literature Review 03/01/1986 (PDF, 6.51 MB)
Description: This report assembles and summarizes most of the water quality and biological (excluding fisheries) information available for the Sacramento River.
Toggle Image San Luis Joint-Use Complex 05/01/2003
Description: The San Luis Complex is jointly owned and operated by the State and federal governments. This publication takes a look at the historical events that led to the construction of San Luis Reservoir, the nation’s largest offstream reservoir, and briefly explains the other facilities within the complex and their operations.
This publication is not available electronically. To inquire further, please contact:
Publications Clerk at (916) 653-1097 or imr-publications@water.ca.gov.
Toggle Image Scott River Flow Augmentation Study 10/01/1991 (PDF, 6.45 MB)
Description: The Klamath River Basin Fisheries Task Force requested that the Department of Water Resources (DWR) investigate the potential for augmenting streamflows in the upper Scott River.
Toggle Image Shasta Valley Water Quality Literature Review 03/01/1990 (PDF, 1.86 MB)
Description: This report identifies locations in the Shasta Valley where water quality impairments produce conditions unsuitable for beneficial uses. It also identifies those situation where the current data is inadequate to assess surface or ground water suitability for beneficial use.
Toggle Image Shasta and Klamath Rivers Water Quality Study 02/01/1986 (PDF, 5.01 MB)
Description: The quality of these two rivers has been monitored at several stations for more than 20 years and resulting data show a great variation. Complaints have been received about excessive foaming, water discoloration, overabundance of algae, and unsightliness. This study was undertaken to investigate the water quality and its variation, from Iron Gate Dam to the guagin station, "Klamath River near Seiad Valley". This report includes a brief overview of the study area, its geology, climate, ...
Toggle Image Silverwood Lake (East Branch) 02/01/1997
Description: At an elevation of 3,355 feet, Silverwood Lake is the highest Project reservoir in Southern California. The publication describes how the lake provides water storage, fish and wildlife enhancement, and recreation.
This publication is not available electronically. To inquire further, please contact:
Publications Clerk at (916) 653-1097 or imr-publications@water.ca.gov.
Toggle Image Smith River Plain Groundwater Study 12/01/1987 (PDF, 7.94 MB)
Description: This study was undertaken to expand knowledge of the geologic and hydrologic conditions that exist in the Smith River Plan Basin, determine the availability of groundwater and its quality, and re-evaluate existing monitoring wells to ensure they were representative of basin conditions.
Toggle Image Some Physical Chemical and Bological Characteristics of the Eel River Estuary 06/01/1977 (PDF, 4.11 MB)
Description: A study was initiated in 1973 to determine the invertebrate and periphyton assemblages, and the physical and chemical characteristics of the Eel River estuary. Due to termination of funding, this study was concluded durin the 1976 fiscal year.
Toggle Image Sources of Salinity in the South Sacramento-San Joaquin Delta 05/01/2007 (PDF, 6.37 MB)
Description: Report documenting discharges on waterways flowing to the State and federal export sites from the San Joaquin River via south Old River and Grant Line Canal. The discharges are mostly agricultural but also include four National Pollutant Discharge Elimination System facilities, urban runoff, and groundwater effluence. The discharges are saline and measurably raise the salinity of water flowing to the export sites from the San Joaquin River. Div. of Operations and Maintenance, Environmental Serv.
Toggle Image State Water Projects Informational Map 05/01/2000 (JPG, 35 KB)
Description: This relief map of California shows the water projects that the Department manages as part of the water delivery system for California. The nature of California's geography, climate, and the location of its population, industry and agriculture have all influenced the State's development and the creation of water storage and distribution projects.
Toggle Image Stream Gage Maintenance Mitigated Negative Declaration 09/01/2002 (PDF, 1.39 MB)
Description: The purpose of this project is to identify stream gage maintenance needs and to obtain permits for a five-year maintenance plan incorporating avoidance and mitigation measures when necessary.
Toggle Image Upper Eel River Development Interim Report Office Report 08/01/1966 (PDF, 3.42 MB)
Description: In July 1964, the Department initiated an Advance Planning Program of the Upper Eel River Development. The initial objective of the program was to select the most favorable conveyance route for delivering project water from the Middle Fork Eel River to the Sacramento Valley. This report summarizes the water quality studies which were made for route selection.
Toggle Image Water Conditions in California (Bulletin 120) 03/01/2009
Description: Bulletin 120 is a publication issued four times a year, in the second week of February, March, April, and May by the California Department of Water Resources. It contains forecasts of the volume of seasonal runoff from the state's major watersheds, and summaries of precipitation, snowpack, reservoir storage, and runoff in various regions of the State.
Toggle Image Water Quality Conditions in the Sacramento-San Joaquin Delta During 1995 08/31/1999 (PDF, 3.41 MB)
Description: Water year 1995 was a wet year, ending an eight-year period of predominantly dry and critically dry years. After a relatively dry fall, January and March precipitation was heavy and produced flooding in the Central Valley. By May 1, precipitation was 165% of average, and reservoir storage was 110% of average. Water quality for all Delta regions was within the historical range of values throughout the 1995 calendar year. Salinity and nutrient concentrations were lower than levels measured during the dry water years preceding the wet 1995 water year. Salinity intrusion was minor in the Suisun and San Pablo bays from October through December 1995, when Delta outflow decreased. Finally, dissolved oxygen concentrations were stable throughout the year at relatively high concentrations.
Toggle Image Water Quality Conditions in the Sacramento-San Joaquin Delta During 1996 07/31/2001 (PDF, 5.88 MB)
Description: Water year 1996 was classified as a wet year with an average stream flow similar or somewhat above that in 1993. As in many recent years, snow pack water content was below average and precipitation was high early in the spring. Dilution associated with the high stream flow produced low nutrient and specific conductance, and high dissolved oxygen concentrations compared with drier years - especially the recent drought years 1987-1992. However, the pattern of highest nutrient concentration in the winter among seasons and in the south delta among regions persisted. Water quality conditions in 1996 were also characterized by comparatively higher Secchi disk depth than in the early 1970's. Further, even though 1996 was a wet year, the dissolved oxygen concentration in the Stockton Ship Channel was below the USEPA and RWQCB standards.
Toggle Image Water Quality Conditions in the Sacramento-San Joaquin Delta and Suisun and San Pablo Bays during 2009 12/01/2010 (PDF, 7.02 MB)
Description: This report summarizes the results of water quality monitoring and special studies conducted by the Environmental Monitoring Program (EMP) within the Sacramento-San Joaquin Delta (Delta) and Suisun and San Pablo bays (the upper San Francisco estuary) during calendar year 2009. This monitoring is mandated by Water Right Decision 1641 (D-1641) and this report is being submitted to fulfill the reporting requirements of this decision.

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