关键词: 滨江流域, GA-BP网络, 降水预报

Abstract: Based on the hydrological observatory data in the study zone and adopted the development of the module and system integration way，it has developed GPS Precipitation Forecast System for River Catchment.The structure，function，running，and key technology of the system are introduced，respectively.Every method of recipitation forecast is simply depicted.An ANN model joined with GA for river catchment precipitation forecast has been set up.The result shows that the model of GA-BP can enhance the forecast precision，and its effectiveness and the reliability has been proved.The system can realize the information processing of different data sources and the precipitation forecast of the result is made by the data of river catchment high altitude，satellite cloud atlas etc.It can service for prewarning predicts and prevent flood for the flood.

Key words: Binjiang river catchment, GA-BP network, precipitation forecast