Method for the early warning of shallow landslides in Sichuan province, China

Abstract

Regional precipitation-induced landslide is one of the major geologic hazards in our country, which features large areas of damage, simultaneity, sudden breakout and serious consequences. Especially in Sichuan province where has happened earthquake, tectonic changed, secondary disasters happened very frequently. It is essential to carry out the research into the forecast and early warning of precipitation-induced landslide at the beginning of the national campaign launched for the geologic hazard weather forecast and early warning. Sichuan province was chose as study area, remote sensing image and actual statistics was basic material, combined the rainfall data, analysis the relationship of spatial and temporal distribution of landslide and rainfall comprehensively, the sensitivity of shallow landslide in Sichuan and the critical value of rainfall that induced landslides was determined. And simulate prediction was made, the time was July 17, 2009. The whole method was practical and feasible, scientific basis could be provided for prevention and mitigation.