以降雨量及氣象雷達回波建立萬山部落邊坡破壞預警系統

An Early Warning System for the Landslide Disaster at Wanshan District Using Weather Radar Echo and Rainfall Data

趙亮均(Liang-Jyun, Jhao)；李德河(Der-Her, Lee)；吳建宏(Jian-Hong, Wu)

邊坡滑動 ； 降雨量 ； 雷達回波 ； 預警系統 ； Slope failure ； rainfall ； radar echo ； early warning system

中華防災學刊

16卷2期（2024 / 09 / 01）

167 - 174

繁體中文;英文

本研究選定高雄市茂林區萬山部落上方一處崩塌區（潛勢區編號編號D048）為研究對象；在現地進行鑽孔取得岩心與地質資料後，施測地電阻與進行室內試驗，藉此了解邊坡地層分佈狀況與力學性質等，同時裝設地層傾斜與地下水位變動監測儀器等進行長期監測，用以觀測邊坡變動與地下水位變動之趨勢，並由監測所得之數據決定臨界地下水位高程，探討降雨引致地下水位變動以致邊坡破壞之關係。此外，本研究使用中央氣象署提供之氣象雷達回波資料，整理出雷達回波強度與降雨量之迴歸關係，結合臨界地下水位高程與邊坡穩定性之關係，作為建立邊坡破壞預警系統的參考依據。

The present project focuses on a landslide area (designated as hazard zone D048) located above the Wanshan district in Maolin District, Kaohsiung City, Taiwan. After conducting on-site drilling to obtain core samples and geological data, electrical resistivity surveys and laboratory tests will be carried out to understand the distribution and mechanical properties of slope layers. Long-term monitoring will be conducted by installing instruments such as inclinometers and groundwater level sensors to observe trends in slope movements and groundwater fluctuations. The collected data will be used to determine the critical groundwater level and investigate the relationship between rainfall-induced groundwater level changes and slope failure. Additionally, the project will utilize meteorological radar data provided by the Central Weather Bureau to establish a regression equation between radar echo intensity and rainfall. Combining this equation with the relationship between critical groundwater level and slope stability, it will serve as a reference for establishing a landslide warning system.