Runoff coefficients and runoff curves for urban stormwater retention model


I am using the Urban Stormwater Retention model for the first time. I had a question about runoff coefficients. I am building my biophysical table and found runoff curve numbers for each land use. However, I am confused about how to convert these into a coefficient number. See attached table! Any help would be greatly appreciated!


biophysical table.xlsx - Sheet1.csv (614 Bytes)

Hello @muellerm32 and welcome to the forums! We have a section of the User’s Guide chapter for the Stormwater model describing various approaches to calculating runoff coefficients, located here: Urban Stormwater Retention Model — InVEST documentation

Could you take a look at that section and any relevant references and let us know if you have any further questions?