A comparison of snowmelt models for erosion prediction

The prediction of erosion requires precise information on the rate of snowmelt delivery to the soil surface and drainage courses where erosion may occur. We have developed a modular approach to snowmelt modeling that can combine and interchange components from several popular energy balance and temperature index models such as the SHE model, PRMS model and USU model. Comparisons are made against data from SNOTEL sites widely distributed in the western U.S., as well as some experimental sites where more detailed data are available. These sites cover a range of settings with differing forest cover density, climatic region and elevation. We evaluate the various models and model combinations with a view to determining the most appropriate combination for use in an erosion prediction model.