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|標題:||Estimation of Slopeland Soil Loss in Erhjen Creek Watershed
|作者:||陳文欽||關鍵字:||usle;泥岩;Geographic Information System;Remote Sensing;數值地形模型;衛星影像||出版社:||水土保持學系||摘要:||
Due to steep topography, weak geology, heavy rainfall in the typhoon season, tremendous soil loss disaster usually occurs in Taiwan especially at the mudstone areas. Geographic Information System (GIS), Remote Sensing (RS), and Global Positioning System (GPS) coupled with Universal Soil Loss Equation (USLE) were used to estimate watershed soil loss in Erhjen Creek located at mudstone areas. Watershed topographic and hydrologic information of interest was also extracted automatically from Digital Terrain Model (DTM) in this study for the references of slopeland planning and design. There is no obvious difference between model estimation and field measured in watershed soil loss. Regression analysis shows that the amount of soil loss for 19 analyzed sub-watersheds: 6 sub-watersheds related to Rainfall Index, 11 sub-watersheds related to Soil Erosion Index and 3 sub-watersheds related to aspect factors. The amounts of soil loss for 19 analyzed sub-watersheds are all highly correlated to the slope length, slope, and cropping factors. The slope length, slope, and cropping are the key factors to reduce soil loss at the mudstone slope land.
|Appears in Collections:||水土保持學系|
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