Evaluation of soil losses at Laopi terrace by using Water Erosion Prediction Project (WEPP) model and its validation by in-situ soil loss estimation

• Main Authors: Liou, Ruei-Cheng, 劉睿呈
• Other Authors: Jien, Shih-Hao
• Format: Others
• Language: zh-TW
• Published: 2016
• Online Access: http://ndltd.ncl.edu.tw/handle/40435363888488939388

碩士 === 國立屏東科技大學 === 水土保持系所 === 104 === Well understanding of soil erosion situation can help us to make a suitable management strategy in a watershed. Universal Soil Loss Equation (USLE) is a popular equation to predict soil loss contents, but its parameters should be still revised based on local climate conditions, topography and etc.. United State Agricultural Department (USDA) attempts to develop another model, Water Erosion Prediction Project (WEPP), to predict sediment production on slopelands to compensate USEL in precision of soil loss prediction. This study used WEPP model to predict sediment production in different land uses at Laopi terrace under a tropical climates. We also set up erosion piles in different land uses at Laopi terrace to validate the prediction values. The results indicated that WEPP model might effectively predict sediment production in pineapple, bare land, and areca farms due to small relative error ranged from 19% to 46% found between predicted and measured values, particularly in “flowpath” model. We concluded that some parameters of WEPP model should be further revised when we used it under tropical climates, particularly in “watershed” model.