The Three Gorges Reservoir Flood Forecasting And Its System Development & Application

The Three Gorges Project is the world's largest water control project in flood control, power generation, shipping, playing a great comprehensive benefits, so flood control efforts are particularly important[1]. This paper introduces the flood forecasting software in the domestic and international developments and research trends, for the Three Gorges reservoir flood basin practical engineering problems, research and analytical range of the Three-Gorges valley natural and geographical conditions, heavy rain and flooding characteristics, improving the original Xin'anjiang three-source model, using the SIMHYD model, API rainfall-runoff forecasting model, the establishment of a hydrological forecasting model library, the coupling of the Kalman filter[2], multi-order autoregressive and temporal distribution of real-time flood forecast error correction technology, design of hydrological prediction dedicated database, developers completed the Three Gorges reservoir flood forecasting system.Three Gorges reservoir flood forecasting system software, powerful, user-friendly interface, easy to operate. The entire system integrates hydrological information query and management, hydrological forecasting and hydrological forecasting model base-specific database module, and several other main parts. Hydrological information query and management module enables real-time hydrological data and information inquiry function, and these data into a hydrological forecasting dedicated database for fast retrieval and real-time hydrological forecasting hydrological models provide a powerful data support. Hydrological forecasting model library modules from a variety of runoff forecasting model, of which improve the physical mechanisms that have distributed Xin'anjiang model, SIMYHYD model, API unit hydrograph rainfall-runoff models to the inbound traffic on the Three Gorges accurate forecasts, its comprehensive forecast accuracy above 95% of one day, and the introduction of weather satellites, radar, rain gauge, and other advanced methods of numerical weather prediction forecast rainfall, breaking the original period of flood forecast depends on the watershed of the predicted convergence of the time constraints, making the existing flood forecasting in the Three Gorges Reservoir foreseeable period from 5 days to 7 days. For flood control and power generation scheduling provides a full decision-making time, thereby increasing the social and economic benefits.