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Hydrologic soil group classes are used in the computation of runoff by the SCS (now NRCS) Curve Number Method. Class placement is based on the minimum annual steady ponded infiltration rate for a bare ground surface.

Methodws | Datasets | Image

STATSGO Mapunits | Soil Texture Class | Depth to Bedrock
Sand, Silt, Clay Fractions | Rock Fragment Class | Rock Fragment Volume
Bulk Density | Porosity | Permeability
Available Water Capacity | pH | Plasticity
K-Factor | Hydrologic Soil Groups | Curve Numbers

Background | Methods | Data Coverages | Citation | Feedback

CONUS-Soil | STATSGO | SSURGO

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Comments and Questions

4/19/99