莫拉克重大崩塌災害歷程探討

Landslide Investigation from Typhoon Morakot

10.29417/JCSWC.200912_40(4).0002

陳聯光(Lien-Kuang Chen)；游繁結(Fan-Chieh Yu)；劉格非(Ko-Fei Liu)；林聖琪(Sheng-Chi Lin)；柯明淳(Mei-Chun Kuo)

莫拉克颱風 ； 崩塌 ； Typhoon Morakot ； landslide

中華水土保持學報

40卷4期（2009 / 12 / 01）

329 - 337

繁體中文

高雄縣甲仙鄉小林村於莫拉克侵台期間，發生大規模崩塌超過2,500萬立方之土石掩埋小林聚落超過400人死亡失踪的重大坡地災害，本研究以小林村崩塌災害前後的地形、災害規模、地質、降雨、河川水位以及地表振動等資訊進行探討災害發生歷程與其影響。由分析結果顯示，超越歷史紀錄的強降雨以及地質構造脆弱區爲小林村崩塌災害發生的主要原因，崩塌所引致之堰塞湖潰決形成之山洪暴發亦導致下游10公里外的橋樑與水利設施嚴重的衝擊。透過觀測資訊輔助探討災害歷程，將可提供未來災害防救各項預警時間以及應變處置之重要參考。

Xiaolin village is located in Kaohsiung County, Taiwan. During typhoon Morakot, mass movement of over 25 million cubic meters of earth buried and killed more than 100 houses and 400 people. By comparing topographical changes, geological conditions, rainfall records, river water levels and ground vibrations, the conclusion shows the record-breaking rainfall and the fragile geological formation were the major causes. The disaster process analysis can provide important criterion for predicting and preventing similar large scale disasters.