Abstract
The difficulties involved in calibration of physically-based erosion models have been partly attributable to the lack of robust optimization tools. Recently, a global optimization method known as the SCE-UA has shown promise as an effective and efficient optimization technique for calibrating watershed models. This paper presents the essential concepts of the SCE-UA method and a physically-based erosion model, and then presents the optimization results in which the WESP model was calibrated. On the basis of these results, the recommended erosion parameter values are given, which should also help to provide guidelines to estimate them in other similar areas.
