基于WEB的浙江省降雨型滑坡预警预报系统

滑坡发生的最主要诱发因素是降雨.基于浙江省淳安、磐安、庆元和永嘉4个县的历史滑坡资料, 在研究降雨量、降雨强度和降雨过程与滑坡灾害的空间分布、时间上的对应关系, 建立起滑坡灾害时空分布与降雨过程的统计关系, 确定区域性滑坡的临界降雨量和降雨强度阀值的基础上, 开发出了降雨型滑坡预警预报系统, 其中采用临界降雨量模型和有效降雨量模型来进行预警预报.系统留给浙江省气象台一个传送数据的接口, 气象台将每天按时上传降雨数据, 数据保存在后台数据库MicrosoftSQLServer中.建成的系统能够自动获取数据库中的数据生成时间与降雨量实时曲线, 当降雨量达到降雨强度阀值时, 触发MAPGIS图件, 在Internet上发布区域预警预报信息, 并提供预警措施. 

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.