Real Time Flood Forecast And Regulation System In Yuanshui River

Based on the key problems of flood forecast in Hunan province, hydrology models, reservoir regulation models, computer technologies and GIS techniques were used to study nature characteristic and flood-rainstorm forming mechanism in Yuanshui river for developing real time flood forecast and reservoir regulation system in Yuanshui river, which can be used widely and may solve actual problems of flood forecast. Flood forecast modules in this system are of functions of integrating and compiling model parameters, and finally forming a parameter file in form of the parameter Cards which can be linked to parameter database . These modules can also conduct compiling and recompiling between the parameter file and the parameter database so as to make the flood forecast system become an integrated one. The system developed in this project changed complex forecast schemes into a practical, advanced and universal system. This system provided a convenient and effective approach for Yuanshui river flood forecast. The system has been used in the flood forecast of Xiangshui, Zishui, Yuanshui, Lishui and other branch rivers, and it became universal system of flood forecast and reservoir regulation in the four rivers' and Dongting lake watersheds through integrating many hydrological and reservoir models were established. Good links with the other system, ie. the Dongting Lake hydraulics-rounting model. It was a key step toward developing real time forecast in Hunnan province. The four main parts included in this paper are as follows: model parameter determination, forecast scheme configuration, real time flood forecast, reservoir regulation ,and precipitation and flood information enquiry.The results obtained by applying the proposed the system revealed that flood forecast accuracy are improved to some extend and that the lead time of forecast are lengthened compared with chuantong traditional flood forecast schemes.