Evaluation of a Watershed Model to Simulate Sediment Transport in a Small Agricultural Watershed in Indiana

摘要

The streamflow and sediment components of the watershed model, Hydrological Simulation Program-Fortran, were evaluated by calibration, verification, and sensitivity analysis using 2 years and 9 months of data collected from the 2.7 square-mile Hooker Creek watershed. The results of modeling are presented by a quantitative comparison of measured to simulated data, a qualitative discussion of model performance, and a quantitative description of model error. The model incorporates precipitation, streamflow, and sediment-concentration data, collected at 5-minute intervals, and climatic data collected daily. Sixteen storms that produced more than 0.7 inch of rainfall each were used for calibration and verification of the model. Hydrographs of simulated sediment concentration generally have smaller peaks and longer recessions than do the hydrographs of measured data.