Regional Landslide Hazard Warning and Risk Assessment

Abstract

Regional landslide hazard prediction and warning is still a difficult problem and hot topic in the research of landslide hazards. In the past decade, the researches mainly focused on the analysis of the combination of rainfall and geological environment. In this paper, we summarize the current studies of landslide hazard prediction and risk assessment, and propose that the combination of hazard prediction with risk management is not only the need for hazard prediction and prevention, but also the trend in the future. Basic theories are discussed from two aspects: the spatial prediction and time warning. Based on these theories, we set up a landslide hazard information management system and a real-time warning information releasing system, which is developed on MapGIS platform. Taking landslides as examples in Yongjia City, Zhejiang Province, during the period of typhoon Rananim of 2004, we have studied the spatial landslide hazard prediction, life vulnerability assessment and economic risk assessment.