桂林中小河流洪涝气象风险预警系统设计

Design of the Middle and Small Rivers Basin Flood Meteorological Risk Warning System of Guilin

基于自动站、数值预报和雷达估测降水等多种雨量资料,利用ArcGIS技术提取河流的经纬度、流域范围,利用泰森多边形技术计算流域面雨量,结合对桂林中小河流域的历史暴雨洪涝风险个例分析结果,确定临界面雨量,建立桂林中小河流域洪涝灾害风险等级预警系统。利用数学内插技术进行雨量精细化插值,实现全市100多个水库、200多条河流关键点的雨量监测、预报、预警。利用Web和GIS技术实现桂林中小河流洪涝预警网页发布。

Based on precipitation data of automatic stations,numerical prediction and radar precipitation estimation,longitude,latitude and the drainage basin area are got by using ArcGIS and the basin area precipitation is calculated by Thiessen Voronoi Technology. Combining with the analysis results on cases of historical small and medium-sized rivers flood in Guilin,the critical surface rainfall is determined and a warning system is built. Using the mathematical interpolation technique for fine interpolation of rainfall,the key notes rainfall monitoring,predicting and warning of more than 100 reservoirs and more than 200 rivers are realized. Using the GIS technology,the meteorological risk warning of the middle and small rivers basin flood can be issued by webpage.