抄録
Indonesia is extremely vulnerable to climatic hazards and the frequency of disasters is gradually increasing. In the Kelara watershed of South Sulawesi, shallow landslides have been occurring every year in the last six years due to increases in rainfall intensity. As a result, roads and the local inhabitants often suffer from incidences of shallow landslides causing loss of life and wealth. The objective of this study is to determine rainfall thresholds for shallow landslides in the Kelara watershed. Thirty-six shallow landslides occurring from 2005 to 2010 were studied to analyze rainfall thresholds. Records of rainfall data and history of shallow landslides were collected from the Ministry of Public Works of the government of Indonesia. The threshold, defined by the lower envelope of the plots representing shallow landslides-triggering rainfall events, is expressed as I = 31D-0.72. The threshold rainfall for shallow landslides is very important information for warning developed in the study area.
