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|標題:||Extraction and application of topographic depressions along the roads in the Yizen bridge watershed located at the upstream of the Puzih River
|關鍵字:||Vulnerability analysis;Depression storage area;Curve Number;脆弱度分析;窪蓄區位;CN 值||Project:||水土保持學報, Volume 45, Issue 3, Page(s) 769-778.||摘要:||
Due to climate change, increasing frequent high-intensity rainfall causes large amount and scale of disaster in the slope land. The surface runoff intercepted by the roads is easily to erode the nearby slope land and severely affects the road safety in case of non-adequate treatments while encountering heavy rains. This study is focusing on the effects of disaster prevention measures on the landslides along the roads. A case study of Yizen bridge watershed located at the upstream of the Puzih River is used to extract and classify the sites of potential vulnerability along the roads for evaluating the high risk rank of the tested roads. The potential landslide on the upper slope, potential landslide in headwater watershed and topographic wetness index were analyzed and overlaid with the roads to extract the potential vulnerability along the roads. In addition, topographic depressions were extracted using DEM and then the depressions nearby the roads with highly potential vulnerability coupled with the analysis of CN were used to priority screen the placement of depression for the reference of constructing the detention and/or sedimentation ponds.
|Appears in Collections:||第45卷 第03期|
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