222-Soil Erosion and Sediment Yield Estimation by Empirical and Process-Based Approaches.

Abstract

The paper presents the outcomes of a comparative analysis of erosion and sediment yield estimation using two different modeling approaches. The main objective of the study was to simulate soil erosion and sediment yield using two different approaches: empirical and process-oriented. The Revised form of Universal Soil Loss Equation (USLE) along with the Sediment Delivery Distributed Model (SEDD) was the empirical approach and 1-D model based on kinematic routing was the process-based approach selected for modeling. The grid-based models developed using these two approaches were applied in a sub-basin of Mun river basin, Thailand to simulate soil erosion, sediment transport and delivery. The simulated outcomes from the process-oriented model are found to be closer to observations as compared to the outcomes of the empirical approach.