An analysis on the characteristics of landslides induced byheavy rainfall associated with Typhoons Herb (1996) andTroaji (2001) in Nantou on Taiwan

摘要

Debris flows associated with landslides occur as onernof the most devastating natural disasters that threat Taiwan.rnTypically, three essential factors are needed simultaneously torntrigger debris flow, namely sufficient soils and rocks, favorablernslope, and abundant water. Among the three essentials, thernslope is natural and static without external forcing, while thernlandslide is generally induced by earthquake or rainfall events,rnand the water is produced by heavy rainfall events. In thisrnstudy, we analyzed the landslides triggered by the typhoonsrnHerb (1996) and typhoon Troaji (2001). It is concluded that thernstatistical data are useful to quantify the threshold of the potentialrnlandslide area. Then, the possibility to prevent the debrisrnflow occurrence may be increased.