以3S技術進行屏東縣霧台鄉好茶村土砂災害調查與評估

Using 3S Technology on the Assessment of the Landslides and Debris Flows in Hao-Cha Village

沈哲緯(Che-Wei Shen) ； 曹鼎志(Ting-Chi Tsao) ； 鄭錦桐(Chin-Tung Cheng) ； 陳頎夫(Chi-Fu Chen) ； 羅文俊(Wen-Chun Lo)

《水保技術》 4卷2期 (2009/04) Pp. 92-101

https://doi.org/10.30040/JSWCT.200904.0003

摘要

台鄉好茶村於民國96年8月7日起遭逢帕布、悟堤、0809水災及0813豪雨、聖帕颱風侵襲後，造成好茶部落北側邊坡崩塌，西側土石流順勢沖刷而下，導致原好茶國小及部分民宅、教會被崩落土石淹沒。有鑑於此，本研究利用3S技術進行定性與定量的分析與描述，並採用無人航空載具拍攝，以瞭解目前境內崩塌地、土石流與河道沖淤全貌。分析結果顯示，在連續豪雨事件之後，致使邊坡抗剪強度降低，造成好茶村北側邊坡大規模崩塌，另造成西側屏東006土石流潛勢溪流發生大規模土石流，其土砂災害料源使河床不斷淤高，景象令人怵目驚心。

關鍵字

3S技術 ； 無人航空載具 ； 崩塌地 ； 土石流 ； 河道沖淤

並列摘要

Hao-Cha village suffered from several typhoons and heavy rains since August 7, 2007. Those events caused the landslides in the northern part of Hao-Cha village and induced the occurrence of debris flows from the eastern part. That would damage the elementary school, partial houses and churches in that region. In view of the points, this study utilized 3S technology to qualitatively and quantitatively analyze certain debris hazard type. In the meantime, pilotless plane equipments were to take pictures around the damaged village and those pictures would help us to understand the suffering situation of landslide after the hazards attacked. From the results, the resistant shear strength would be reduced due to continuous heavy rain events and then the large scale landslide was to happen promptly in the northern part. The landslide deposited mainly in back basketball court of Hao-Cha elementary school. The height of deposition would decrease progressively from the northern part of slope to Ai-Liao south river. The typhoons and heavy rains brought much water and deposition in the river and make the river silted up so that The height of deposition almost equaled in that of the revetment. After all, the river courses generally belonged to the silted-up phenomenon and those phenomenon showed significantly especially in Ai-Liao south river.

並列關鍵字

3S Technology ； Unmanned Aerial Vehicle ； Landslides ； Debris Flow ； Riverbed Sedimentation