Impact Assessments

Baseline assessments conducted through the WWCRAs evaluate risks to water supplies (change in snowpack, changes in timing and quantity of runoff, and changes in groundwater recharge and discharge) and any increase in the demand for water as a result of increasing temperatures and reservoir evaporation rates. Impacts Assessments establish baseline risks to water supplies and demands in Reclamation river basins to establish a foundation for more in-depth analyses and the development of adaptation strategies. The information determined in an Impact Assessment is used as a foundation to Basin Studies, operations planning, feasibility level analyses, or other activities that can benefit from the results.

Upper Missouri River Basin Climate Impacts Assessment

This study is being conducted as a baseline assessment to support the Missouri River Headwaters Basin Study in Montana. The focus of the Impacts Assessment is to develop a regional water planning model, which will be used as the basis for analysis of imbalances in water supply and demand, and subsequent evaluation of proposed alternatives to reduce any identified imbalances as part of the Missouri Headwaters Basin Study. This Impacts Assessment will provide a foundation for future collaborative efforts, including the Missouri Headwaters Basin Study and drought resiliency planning efforts.

Columbia River Basin Impact Assessment

The Columbia River Basin Impact Assessment is being conducted to evaluate the potential impact of future climate change on flows at more than 300 locations across the Columbia River Basin. This assessment will determine baseline risks to water supplies and demands to establish a foundation for more in-depth analyses. The impacts of these changes will be analyzed on water delivery, power generation, ecological resources, flood control, and recreation at Reclamation facilities. To identify the risks and impacts to these components, the Assessment will use the best available science and climate information within a planning context at the reconnaissance level. Project Website

Sacramento and San Joaquin Basins Climate Impact Assessment

This study was conducted as a baseline assessment to support the broader Sacramento and San Joaquin Basins Study. The study presents an overview of the current climate and hydrology over the entire Central Valley including the Sacramento, San Joaquin and Tulare Lake basins. It also evaluates how projected climatic and hydrologic changes could impact water availability, management and demands while analyzing impacts of future urban growth and changes in land-use within the Central Valley.

Upper Rio Grande Impact Assessment

This study was conducted by the Bureau of Reclamation in partnership with Sandia National Laboratories and the U.S. Army Corps of Engineers. It includes a detailed evaluation of the climate, hydrology and water operations of the upper Rio Grande basin of Colorado and New Mexico. Also included is an evaluation of the potential impacts associated with climate change on streamflow, water demand and water operations in the basin.

Last Updated: June 26, 2015