921集集大地震誘發大山崩與形成堰塞湖災害初步調查 | 台灣景點玩透透

The Chi-Chi earthquake occcurred at September 21 early morning (1:47AM) in 1999. The epienter was located at 12.5 Km far from the west of Sun-Moon Lake, Chi-Chi, Nantou county. It has been recognized as a serious disaster caused by Chi-Chi earthquake. The Damges of public consturction, agricultural facilities, humman activities supporting networks and transportation systems have been identfied and investigated by using aerophotography and satellite image processing technology. 2365 landslide spots have been identified by the aerophotography technology. The stability of dam-forming landslide located at Nantou county proved to be critical and important in the disaster area. The volume of impoundment was estimated to be 35*106 m3 in total area of 698 ha. In fact, the most common initiation mechanisms for dam-forming landslide are excessive rainfall, snow melt and earthquake. However...