Data sources

Reference: the national datasets behind every model.

• NHDPlus HR — high-resolution hydrography (streams, catchments, connectivity).
• 3DEP — national elevation for terrain and delineation.
• gSSURGO — soils.
• NLCD — land use and land cover.
• PRISM — climate normals and weather context.
• National groundwater lithology inventory — subsurface for coupled groundwater models.
• National soil PFAS inventory — source terms for coupled PFAS studies.