台灣西南部麓山帶地殼變動速率活躍，本計劃在分析台灣西南部泥岩地區二仁溪流域的5
公尺高解析度DEM過程中，發現高解析度的DEM需先經過「處理」，以去除軟體在自動萃取
河流水系時，可能會造成干擾的橋樑、公路與高速公路等人文地物，才能繼續進一步分析。
利用河流蜿蜒度指標分析的結果顯示，河流在流經龍船斷層、古亭坑斷層與古亭坑背斜附近
時，蜿蜒度會增高的現象，顯示這些構造線存在某種程度的活動性。河流水力侵蝕模型分析
的結果顯示，位於活動構造線下盤的水系S-A關係圖呈現系統性下凹的型態，而流經活動構造
線與其上盤的水系S-A關係圖則呈現系統性上凸~直線的型態。此結果顯示，在以侵蝕營力為
主的後均衡泥岩地形區，活動構造線的抬升營力會使其局部呈現出前均衡~均衡地形。 The foothill belt of southwestern Taiwan is characterized by its relatively fast crust
deformation. While analyzing the DEM of 5 meter high resolution of the Erjen basin in the
mudstone area in southwestern Taiwan, we found that the DEM should be “modified” to erase the
man-made landscape such as bride, road, and highway. Then the software will be able to generate
the river drainage automatically and correctly. The result of sinuosity analysis shows that sinuosity
will increase while river running across the Lungchuan fault, Gutingkeng fault, and Gutingkeng
anticline. This means that these structure lines contain certain activity. The result of analysis of
Stream-power incision model shows that S-A plots of the drainage located in the footwall of the
structure lines have concave form systematically. But S-A plots of the drainage running across the
structure lines and hangwall have convex to straight form. This means that in the mudstone area,
typically the post-steady state topography mainly causing by erosion process, uplift process of
activity structure lines will also let it locally appear pre-steady-state to steady-state topography.
