Study on flood control storage capacity of Xiajiang Reservoir in Ganjiang River

According to the comprehensive planning of flood control projects in the mid-lower Ganjiang River,considering the combination of flood control storage capacity of Xiajiang Reservoir and flood storage capacity of Quangang flood diversion-detention area,we draw up two flood regulation schemes: the reservoir and flood diversion-detention area jointly operate for flood control;the reservoir controls the flood coming from the upper stream of Xiajiang hydropower project,while the flood diversion-detention area is only used for the diverting and storing the flood yielded in the downstream area of the dam.Through flood routing for 8-year-types' design flood,the flood control and diversion-detention storage capacities of the two schemes are obtained.Scheme 1 is selected through comprehensive comparison,which can fully use the existed structure measures,reduces the inundation area without additional investment,and meet the requirement of downstream flood control.