Proceedings of the Seventh International Conference on Hydroscience and Engineering, Philadelphia, PA, September 2006. http://hdl.handle.net/1860/732This paper reports the results of soil biogeochemical analyses (e.g., organic matter, % of clay, % of
sand, CEC, pH, etc.) performed to characterize the biogeochemical properties of soils in the Upper
South Amana area, a sub-catchment of the Clear Creek Watershed. Most of these properties are in
turn used as inputs to the WEPP (Water Erosion Prediction Project) upland erosion model to predict
sediment erosion rates. WEPP is a process-based, event-based, distributed parameter, water flow
driven erosion prediction model. Climatic data and Digital Elevation Models (DEM) are also
incorporated in the model along with the biogeochemical properties of the soils. The WEPP model
is first calibrated and then a sensitivity analysis is performed to identify the governing parameters of
upland erosion in the Upper South Amana Area. Such comparison will further strengthen the
argument regarding event-based simulations vs. continuous based simulations. The results of this
study will be used for supplementary investigation of physical mechanisms of upland erosion
processes
