Warning System for Rain-Induced Landslides Based on Internet in Zhejiang Province, China

One of the main factors attributed to landslide causation is rainfall. On the basis of historic landslide information from Chun'an, Pan'an, Qingyuan and Yongjia, in east China's Zhejiang Province, this paper studies the relationship between rainfall, rain intensity, rain process, and the spatial distribution and time effects of landslides. Statistical connections between time, spatial distribution and precipitation are set up, and the critical rainfall and the threshold values of rain intensity are presented. Based on these, a warning system for rain-induced landslides is developed. In the system, the critical rainfall model and effective rainfall model were adopted for prediction, and an interface was provided for the Zhejiang Province observatory. The rain data will be uploaded to the server using this interface, and saved in a Microsoft SQL Server database. The data can be obtained automatically from the database to build a real-time curve between time and rainfall. When the rain intensity reaches the rainfall threshold values, a geo-hazards map will be triggered, prediction information will be released, and preventative measures will be provided via the Internet.