台灣東部縱谷斷層的活動性研究－古地震與構造地形研究－應用非均衡地形的河流水力侵蝕模型反映活動構造之研究

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Please use this identifier to cite or link to this item: https://ir.cnu.edu.tw/handle/310902800/2536

Title:	台灣東部縱谷斷層的活動性研究－古地震與構造地形研究－應用非均衡地形的河流水力侵蝕模型反映活動構造之研究
Authors:	陳彥傑
Contributors:	觀光事業管理系
Keywords:	泥岩數值地形模型河流蜿蜒度河流水力侵蝕模型均衡地形 Mudstone DEM Sinuosity Stream-power incision model Steady-state topography
Date:	2007
Issue Date:	2008-07-31 16:50:48 (UTC+8)
Publisher:	台南縣：嘉南藥理科技大學觀光事業管理系
Abstract:	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.
Relation:	計畫編號：NSC96-2119-M-041-002
Appears in Collections:	[Dept. of Tourism Management] MOST Project

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