Sacramento Soil Series
USDA Code: CA0631
K-Factor
0.28
Soil Erodibility Factor
Texture Class
clay
Drainage Class
poorly drained
About Sacramento
Deep, poorly drained soils formed in alluvium from mixed rock sources. Found on basin rims and low terraces in the Sacramento Valley.
K factor values are sourced from the USDA Natural Resources Conservation Service (NRCS) SSURGO database.
Using Sacramento in a RUSLE calculation
For a California construction project, use the soil K factor with rainfall erosivity, slope length and steepness, cover management, and support practice inputs. The K factor represents the soil erodibility portion of the model, so selecting the soil series that matches the site is important for defensible stormwater documentation.
In a SWPPP workflow, the practical question is not just what soil type is mapped near the project. It is whether the mapped series, K factor, and drainage assumptions match the site evidence well enough to support the RUSLE or RUSLE2 calculation.
California Distribution
Found primarily in Sacramento and San Joaquin counties. Heavy clay content causes significant shrink-swell behavior.
Counties Where Found
Sacramento soil FAQ
What is the K factor for Sacramento soil?
Sacramento has a listed K factor of 0.28 in the Rapid RUSLE soil directory. Confirm final values against project specific soil survey data before submitting permit documents.
Where is Sacramento soil found in California?
Sacramento is mapped in Sacramento, San Joaquin. County mapping is based on available soil series data and should be verified for the exact project location.
How is Sacramento used in RUSLE erosion calculations?
Use the Sacramento K factor as the soil erodibility input in RUSLE or RUSLE2, along with rainfall, slope, cover, and support practice factors for the site.
Calculate erosion risk with Sacramento soil data
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