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Columbia River National Scenic Area GIS (Geographic Information Systems) Data

    This page contains metadata, or data about data, for our spatial data sets. The data sets are organized by theme which are shown in the table of contents frame. For example, if you are interested in a data set that has to do with water, just click on the water link in the table of contents. Then click on the name of the data set of interest to view the data dictionary. Each data dictionary will explain geographic information about the data set, who the data steward is, how the data set was built, and other associated information. It will also describe the database tables that are associated with the data set. Please contact the data steward (if noted) if you have questions about the content of the data. Their phone number is included within the data dictionary. The export files are shapefiles or geodatabases that have been compressed with WinZip. Projection is a local Albers projection defined for the area of Oregon and Washington in Region 6 of the Forest Service, NAD 83, units are in meters.

    Soil Use - Hydric Soils database

      The Hydric Soils section presents the most current information about hydric soils. It updates information that was previously published in *Hydric Soils of the United States* and coordinates it with information that has been published in the *Federal Register*. It also includes the most recent set of field indicators of hydric soils. The database selection criteria are selected soil properties that are documented in Soil Taxonomy and were designed primarily to generate a list of potentially hydric soils from soil survey databases. Only criteria 1, 3, and 4 can be used in the field to determine hydric soils; however, proof of anaerobic conditions must also be obtained for criteria 1, 3, and 4 either through data or best professional judgment (from *Tech Note 1*). The primary purpose of these selection criteria is to generate a list of soil map unit components that are likely to meet the hydric soil definition.

      Wind Erosion Prediction System (WEPS)

        This site provides access to the WEPS software version used for official purposes by NRCS field offices and Technical Service providers. NRCS developed and maintains the components of the WEPS Databases and information on this site. The USDA-Agricultural Research Service is the lead agency for developing the science in the WEPS model and the model interface. WEPS predicts many forms of soil erosion by wind such as saltation-creep and suspension including PM-10.

        Soil and Water Hub Modeling Datasets

          The Soil and Water Hub is jointly developed by USDA Agricultural Research Service (USDA-ARS) and Texas A&M AgriLife Research, part of The Texas A&M University System. Modeling dataset resources are available for download for use with software tools Agricultural Policy/Environmental eXtender Model (APEX), Soil and Water Assessment Tool (SWAT), ArcSWAT, and related Conservation practices.

          SWAT - Soil and Water Assessment Tool

            The Soil and Water Assessment Tool (SWAT) is a public domain model jointly developed by USDA Agricultural Research Service (USDA-ARS) and Texas A&M AgriLife Research, part of The Texas A&M University System. SWAT is a small watershed to river basin-scale model to simulate the quality and quantity of surface and ground water and predict the environmental impact of land use, land management practices, and climate change. SWAT is widely used in assessing soil erosion prevention and control, non-point source pollution control and regional management in watersheds.