Completed Basin Studies
The following Basin Studies have been completed.
Colorado River Basin Study
Los Angeles Basin Study
The Los Angeles Basin Study was released on Nov. 17, 2016. It looks at the changing demographics, climate change and competing interests for available water supplies and identifies options to meet the water needs of the Los Angeles area into the future. The study found that there is a potential water supply deficit for the region of approximately 160,000 acre-feet-per year by 2035 and 440,000 acre-feet-per-year or 25-percent less water than the region is projected to need in 2095.
The St. Mary River and Milk River Basins Study Summary Report was released on June 28, 2012. It outlines the findings of a two-year comprehensive study of the river basins. The report recommends using and enhancing the new river system model developed through this study to further analyze alternatives to address supply and demand issues in the basins, including Tribal and international issues.
Republican River Basin Study
The Republican River Basin Study identifies adaptation strategies that address water management challenges in the basin. This study, which includes a study area of 2.7 million acres of irrigated agriculture served primarily by groundwater supplies, represents an extensive collaborative effort among Colorado, Nebraska and Kansas.
Sacramento and San Joaquin Rivers Basin Study
This study, collaboratively developed by Reclamation, the State of California Department of Water Resources, El Dorado County Water Agency, Stockton East Water District, California Partnership for the San Joaquin Valley and Madera County Resource Management Agency, examines climate change impacts and adaptation actions for the Sacramento River Basin, San Joaquin River Basin and the Tulare Lake Basin.
- Sacramento and San Joaquin Rivers Basin Study Report and Executive Summary
- Sacramento and San Joaquin Rivers Basin Study Technical Report
- Sacramento and San Joaquin Rivers Basin Study Appendices
The Santa Ana River Watershed Basin Study addresses water supply and demand projections for the next 50 years and identifies potential climate change impacts to Southern California's Santa Ana River Watershed. This study is a first of its kind for the predominantly urban basin. It encompasses approximately 2,600 square miles in Orange, Riverside and San Bernardino counties and is home to more than 6 million residents.
- Summary Report
- Tech Memo 1 - Climate Change Analysis for the Santa Ana River Watershed
- Tech Memo 2 - Greenhouse Gas Emissions Calculator for the Water Sector: User's Manual
- Tech Memo 3 - Inland Empire Interceptor Appraisal Analysis
- Overview of Disadvantaged Communities and Native American Tribes in the Santa Ana River Watershed
Santa Fe Basin Study
The Santa Fe Basin Study identifies shortages in the water supply and potential adaptation strategies to meet the water needs described in the basin’s 40-year water demand projections. The area’s population is expected to increase about 80 percent by 2055 and, unless action is taken, would be expected to result in a shortfall of about 5,155 acre-feet of water per year, the amount of water that provides for more than 20,000 people. When different climate change scenarios were incorporated into the study, water shortfalls of between 6,342 acre-feet to 9,323 acre-feet per year were projected.
Southeastern California Regional Basin Study
The Truckee Basin headwaters begin around Lake Tahoe. The basin includes the Truckee and Carson rivers and Pyramid Lake and encompasses the cities of Carson City, Reno and Sparks, as well as Reclamation's Newlands Project, all in Nevada.