高雄寶來DS02竹林聚落潛在大規模崩塌地之重大土砂災害風險評估與策略因應

本文透過基本資料蒐集、現地環境調查及透過LiDAR資料製作的高精度直觀立體地圖，進行高雄寶來DS02竹林聚落潛在大規模崩塌地之崩塌地判釋。從數值地形資料判別並搭配現地調查，除了發現計畫區內邊坡、道路及構造物上有多處張力裂隙、侵蝕溝，坡面凹陷所產生的多重山嶺特徵外，結合Geo-Studio數值模式，參考以往治理成效及因應氣候變遷下各種情境之邊坡穩定模擬成果，建立計畫區在不同環境條件下之土砂運移演變趨勢模型，做為計畫區內發生大規模土砂災害之風險潛勢依據，研擬適當之調適對策，以緩解大規模土砂致災之威脅；此外，因計畫區保全對象甚多，透過風險分析成果，將該進行之調適對策區分為工程及非工程措施兩類，擬定崩塌地處理、野溪治理、道路改善之分年分期工程規劃；而非工程措施部份，建議規劃進行坡面孔內鑽探以了解滑動特性與區位外，因山體滑動明顯加上保全對向眾多且明確，建議鑽探後設置地下水位變動及地表位移監測，設置管理基準值以利集水區之邊坡安全防災管理。

關鍵字

大規模崩塌防減災；土砂運移演變趨勢；風險評估

並列摘要

Through basic data collection, local environmental surveys and high-precision and intuitive three-dimensional maps produced through LiDAR data, this paper conducts the interpretation of the large-scale potential landslide of the Kaohsiung Bao-Lai DS02 Tzu-Lin settlement. Judging from the numerical topographic data and matching with the local survey, in addition to discovering multiple tension cracks, erosion trenches and multiple mountain features on the slopes, roads and structures in the project area, combined with the GeoStudio numerical model. With reference to the past governance effects and the slope stability simulation results in various scenarios under climate change, the model of sediment transport evolution trend in the project area under different environmental conditions is established as the risk potential for large-scale sediment disasters in the project area. Based on the potential, we develop appropriate adaptation measures to alleviate the threat of large-scale sediment disasters. In addition, due to the large number of protection targets in the project area, through the results of risk analysis, the adaptation measures will be divided into engineering and non-engineering measures. Classification plan for landslide treatment, creak management, and road improvement; instead of engineering measures, it is recommended to plan boreholeing of the slope face to understand the sliding characteristics and location, because the mountain sliding evidence is obviously addition to a large number of protection target, it is recommended to set groundwater level changes and surface displacement monitoring, and set management benchmark values for the catchment area pre-warning system and for slope safety disaster prevention management.

並列關鍵字

Large-scale landslide prevention and mitigation ； Evolution trend of soil sediment transport ； Risk assessment

國際替代計量

高雄寶來DS02竹林聚落潛在大規模崩塌地之重大土砂災害風險評估與策略因應

全文下載

主題瀏覽