Gridded South Carolina StreamStats Runoff Curve Numbers by NLCD Landcover and SSURGO Soils Class (ver. 1.1, September 2025)

This dataset was produced by the US Geological Survey (USGS) as a supporting dataset to be used for the purpose of calculating stream gage basin characteristics in preparation for the South Carolina StreamStats application. This integer raster dataset represents runoff curve numbers for combinations of hydrologic soils groups and land cover classes within the South Carolina StreamStats study area. The source of the soils data was the United States Department of Agriculture (USDA) Natural Resources Conservation Service (NRCS) Soil Survey Geographic Database (SSURGO). The source of the land cover data was the USGS 2019 National Land Cover Database (NLCD) data. This dataset will be used in peak flow regression equations that are used to predict flow in South Carolina streams. The StreamStats application provides access to spatial analytical tools that are useful for water-resources planning and management, as well as for engineering and design purposes.


Inventory of data release:

SC_RCN_LU_CO.tiff (one .tif file):
Cloud optimized GeoTIFF containing integer rasters of runoff curve numbers for soils/land cover combinations


SoilLU_RCN_Cross.csv (one .csv file):
Table of 239 land cover/soils combinations showing sources used to make RCN assignments


RevisionHistory_SouthCarolina_RunoffCurveNumbers.txt (one .txt file):
Text file documenting revision history to this data release.

First posted - August 29, 2022
Revised - September 24, 2025 (version 1.1)