A flood routing model for Jingjiang River-Dongting Lake and its application

The flood control works of the middle reach of the Yangtze River include reservoirs,lakes and flood diversion area.The river networks of Jingjiang River and Dongting Lake with large related areas has much complex law.According to the characteristics,a combined 1D and 2D model for flood routing is established.Furthermore,river flow adopts 1D model;2D model is used for water movement in flood diversion and detention area.And it processed the real-time prediction model,the water interception model of river network and the model of water-exchange in river and diversion area.The model has been used in the catastrophic flood operating of the Jingjiang River.The result shows that the model can reflect the process of the flood routing in the Yangtze River,Dongting Lake and the diversion area.And it can apply to the evaluation of the flood control.