Renmin Zhujiang (Jan 2023)
Layout Optimization of Pajiang River Flood Storage and Detention Area Based on Joint Flood Control and Operation Model
Abstract
Flood storage and detention areas play an irreplaceable role in flood control and disaster mitigation in river basins.However,the significant weakness of safety layout and safety facility construction of flood storage and detention areas in Pajiang River results in difficult decision making and great loss in flood control application,constraining the application effect of flood control.To this end,this paper proposes a layout optimization scheme by combining the flood control capability in each dike and socioeconomic conditions in the studied detention areas.Then,joint flood control and operation model related to Feilaixia Reservoir-Pajiang River flood storage and detention areas is employed to analyze and calculate the flood control effects before and after the optimized layout schemes.Finally,the recommended layout optimization scheme of the detention areas is selected by comprehensive analysis.Results show that by adding Baishatang dike and Guanluchun dike as safety areas of Pajiang River Basin,the potential inundation cultivated area decreases by 163.2 hm2 and the number of people prone to flood risks decreases by 3 002.This indicates the optimized layout scheme can reduce flood detention loss and ensure flood control safety.The results provide technical references and an approach for layout optimization of other detention areas.
