Analysis on Flood Control Unified Regulation of Baiyangdian Wetland and Its Upstream Reservoir Group

摘要

Baiyangdian wetland is the end of defence line to middlestream and downstream of Daqing river, and its geographic position has decided its critical function to flood control of Daqing river watershed. Therefore, according to the flood regulating ability of Baiyangdian, when the basin occur 50 year frequency flood, joint operation programs have been determined firstly, then the joint operation of Baiyangdian and multi-reservoir in parallel upstream have been presented through the pre-discharge regulation and real-time control discharge regulation, through comparison we determined the optimal combination scheme: joint scheduling with Wangkuai, Xidayang and Longmen upstream reservoirs, the storing water of reservoir can appropriately increased by reservoir's flood control capacity, thus we can not diversion flood to Wenanwa by Xiaoguan floodway, it can reduce the flood diversion of 1.62×10~9 m~3; and compared with conventional scheduling, we can reduce 8.57×10~8 m~3 flood diversion to the East wetland through Zaolinzhuang discharge gate. Therefore the flood flow into the flood diversion area reduced significantly, which have great practical significance to the safety of Baiyangdian wetland's surrounding areas and the important cities and towns downstream.