U.S. flag

An official website of the United States government

UNSATCHEM

    Simulates water, heat, carbon dioxide and solute movement in one-dimensional variably saturated media.

    SWMS-3D

      Simulates water and solute movement in three-dimensional variably saturated media.

      SWMS-2D

        Simulates water and solute movement in two-dimensional variably saturated media.

        STANMOD

          Computer Software for Evaluating Solute Transport in Porous Media Using Analytical Solutions of the Convection-Dispersion Equation.

          RETC

            Analyzes the hydraulic properties of unsaturated soils.

            N3DADE

              Evaluates analytical solutions for two- and three-dimensional non-equilibrium solute transport.

              HYDRUS

                Simulates water, heat, and solute movement in one-dimensional variably-saturated porous medium.

                3DADE

                  Model evaluates analytical solutions for two- and three-dimensional solute transport.

                  Watershed Boundary Dataset (WBD)

                    The Watershed Boundary Dataset (WBD) from The National Map (TNM) defines the perimeter of drainage areas formed by the terrain and other landscape characteristics.

                    Data from: Threshold Behavior of Catchments with Duplex Hillslope Soils Feeding Soil Pipe Networks

                      This dataset corresponds with two published studies conducted on loess covered catchments in northern Mississippi, USA within the Goodwin Creek Experimental Watershed that contain extensive networks of soil pipes and corresponding collapse features. These loess soils contain fragipan layers that were found to perch water, thereby initiating the piping processes. The dataset contains data from two papers, specifically these include: (i) the spatial distribution of soil pipe collapses and their size measurements from the Wilson et al. (2015) paper, and (ii) hydrologic measurements of perched water tables on hillslopes, water levels of selected soil pipe locations, and precipitation from the Wilson et al. (2017) paper.