集水區地文水文因子自動萃取之研究

Automated Extracting Watershed Geomorphologic and Hydrologic Factors

林昭遠(Chao-Yuan Lin) ； 林文賜(Wen-Tzu Lin)

《中華水土保持學報》 31卷3期 (2000/09) Pp. 247-256

https://doi.org/10.29417/JCSWC.200009_31(3).0008

摘要

由於數值高程模型資料在集水區自動劃分及水系網路萃取的技術已相當成熟，集水區地文水文因子可結合數值高程模型及排水流向觀念進行自動化萃取。本研究利用九份二山震災後之航拍數值資料，劃定及萃取該地區集水區及水系網路，配合雨量資料及地表狀況，進行集水區之地文水文因子自動計算，作爲評估震災後治理規劃之參考。

關鍵字

數值高程模型 ； 集水區自動劃分 ； 地文水文因子

並列摘要

With the progression of technologies for automated delineating the watershed and stream network, geomorphologic and hydrologic factors of a watershed can be easily extracted from a digital elevation model (DEM). The DEM derived from aerial photos taken at the Chiufenershan area, where two major landslide-induced lakes formed after the hit of Chichi catastrophic earthquake in 1999, coupled with the analysis of average annual precipitation and ground cover condition are used for automated delineating the watershed of interest and extracting the related information of the watershed. The module developed in this study can be effectively used for watershed planning and evaluation.

並列關鍵字

Digital Elevation Model ； automated watershed delineation ； geomorphologic and hydrologic factors