- 期刊
坡地集水區分析模式之建置與應用
Model Establishment and Application for Automated Watershed Analysis on Slopeland
摘要
本研究係以集水區分析為基礎，藉由數值高程資料（DigitalElevation Model，DEM）結合模糊演算法及空間分析理論，解決集水區劃分時排水流向計算之盲點，並提出多重出口理論配合多種集水區劃分模式包括動態出口、河川級序及管理分區等劃分模式，改善門檻值劃分集水區之問題，以劃分更符學理定義之集水區，以及發展源頭追踪法之多重門檻值理論，改善門檻值萃取水系網之問題，以萃取符合地形之水系網。而集水區分析模式之應用有二：（1）將集水區模式結合土壤沖蝕公式及遞移率概念，推估坡面泥砂產量；（2）將集水區模式導入合理化公式，建立集水區洪峰流量計算模式，可應用於颱風暴雨之即時洪峰流量推估。
並列摘要
Watershed has been regarded as the basic unit in the operation and management of soil and water conservation. In this study, fuzzy theory coupled with GIS-based spatial analysis and digital elevation model were used to solve the drawbacks of drainage flow calculation. In addition, outlet-tracing and headwater-tracing algorithms were proposed for flexibly delineating a variety of watersheds, including the user-specified outlets, the stream-order and the management requirement watersheds and extracting realistic drainage networks for the references of watershed management. Combined with erosion loss equation and rational formula, the developed models can be applied to (1) predicting sediment yields on slopeland and (2) calculating rainfall and runoff analysis in a watershed.
延伸閱讀
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