水蝕推估模式WEPP之評估與驗證

Evaluation and Validation of Water Erosion Prediction Project (WEPP) Model

林俐玲(Li-Ling Lin) ； 林文英(Wen-Ying Lin)

《中華水土保持學報》 28卷2期 (1997/06) Pp. 145-156

https://doi.org/10.29417/JCSWC.199706_28(2).0007

摘要

水蝕推估模式WEPP乃以水文學、土壤物理學、植物學、水力學和沖蝕力學為基本的電腦程式，WEPP模式可模擬農地、牧地和林地由於耕作改變表面狀況對表面逕流和沖蝕的影響，並且可模擬隨時間、空間變化之因子對集水區內水文和沖蝕情況之影響。WEPP模式之輸入資料包括水文氣象、土壤、地形和土地利用，這些資料可由現場觀察量創或地理資料庫獲得。WEPP模式經由坡地茶園現場資料的評估與驗證後，證實其應用於小區域的土壤沖蝕推估具有高度的可行性；唯因輸入的資料龐大，部分資料取得不易，因此如能有更準確的輸入資料，定能使WEPP模式具有更佳的適用性。

關鍵字

紋溝間沖蝕 ； 紋溝沖蝕 ； 泥砂產量 ； 水蝕推估模式

並列摘要

The Water Erosion Prediction Project (WEPP) model is a new computer program based on the fundamentals of hydrology, soil physics , plant science, hydraulics, and erosion mechanics. The WEPP model reflects the effects of soil surface conditions owing to agricultuial, range, and forestry practices on storm runoff and erosion. Furthermore, the WEPP model mimics spatial and temporal variability of the factors affecting the watershed hydrologic and erosion regime. The WEPP model requires hydrometeerological, soil, topography, and land-use data. The data can be collected from the field measurement or retrieved from geographical resources data bank. The soil loss predicted by the WEPP was validated with data collected from field experiments conducted at Yu-chih Tea experimental station and National Pintung Polytechnic Institute-Soil and Water Conservation Technology experimental sites. The results indicated that the WEPP model could adequately predict soil loss on hillslope. However, the WEPP model needs a large number of input parameters which may be unknown. The more exact input data, implies a more accurate result.

並列關鍵字

Interrill Erosion ； Rill Erosion ； Sediment Yield ； WEPP