BetaBetaDataset
To assess water availability in the United States for water years 2010–2020, examining the spatial and temporal distribution of water quantity and quality in surface water and groundwater, as related to human and ecosystem needs and as affected by human and natural influences.
The National Water Availability Assessment Report is the first nationwide assessment of water availability that includes the amount of water, quality of water, and use of water for human and ecosystem needs.
The National Water Availability Assessment Data Companion (NWDC) is a centralized website providing U.S. Geological Survey (USGS) model-derived water availability, supply, and use information that underlies the National Water Availability Assessment Report. Although the National Water Availability Assessment Report is for water years 2010-2020, the NWDC includes data as early as 1979. The NWDC complements the USGS's Water Data for the Nation (WDFN), which serves real-time and historical observed water data at surface and groundwater monitoring locations across the Nation. The NWDC extends WDFN's publicly available water data by providing modeled data that are spatially and temporally continuous, filling in spatial gaps between monitoring stations and temporal gaps between periodic samples at these stations.
This assessment uses state-of-the-art models to enable a new evaluation of the balance between natural water supply and water demands at fine scales, providing new insight on areas of the United States with a supply-use imbalance.