坡地災害之發生機制：以溪頭集水區為例─總計畫暨子計畫：坡地土石流發生機制研究

Abstract

民國88 年之九二一地震發生後，不僅產生12,479.72 公頃之新崩塌地，也使得原本就脆弱之坡地地質更易崩解或分解，龐大之土石方移往下游或堆積在河谷上，可能在短期內或長期以後對下游之居民皆會產生相當程度之災害。為了減輕災害規模和威脅，本研究蒐集了國內外土石流之相關文獻外，並分析溪頭在桃芝颱風後之肇災原因。此外，也規劃了本研究明年之實施內容和步驟。

After the occurrence of Chichi earthquake in 1999, not only the 12,479.72 hectares of new landslide happened, but also the fragile geological hillside is easier to collapse or separate than before. These huge sediment deposits located on the upstream creek valley or transporting to downstream area would largely threaten people who live in downstream area. In order to mitigate the scale and threatening of debris-flow disaster, this project collected related literature about debris flow and analyzed the disaster sources of Typhoon Toraji at Hsitou. Moreover, the experimental content and its procedure are also planned here.