Author(s): Chaohong Zhou; Shouquan Chang; Jinyuan Du; Mingxia Wang
Linked Author(s):
Keywords: Flood dispatch; Multiply river network model
Abstract: Yongdingxinhe River is an artificial channel, which protects Tianjin municipality from flood risk. Recent years, because of channel deposit and dyke depression, the carring capacity of channel has been reduced seriously. In case of flood, it's very dangerous for Tianjin. So detention basins should be used to diverge flood. A multiply river network model, which bases on junctions group method is adopted for flood dispatch of Yongdingxinhe River. According to the complicated dispatch condition, the original model has been improved to suit for present dispatch measures' calculation, optimized dispatch measures' calculation and real-time dispatch calculation. This study indicates that the model can complete calculation in short time steadily and accurately. In this text, the reduction of river channel's water stage, discharge, storage of detention basins and their damage are calculated. The calculation result of present dispatch measures indicates it is an effective way to reduce water stage in main stem to divert flood into detention basins, but the unreasonable present diversion gate conditions increase the damage in detention basins. If adjusting the diversion gate condition, the damage can be reduced greatly.
Year: 2001