摘要
Abstract
Based on the current engineering conditions and social economic situation,a numerical simulation of the flood risk scenario of Meilin Reservoir collapse in Shenzhen was conducted,and economic loss estimation was carried out for the downstream densely populated urban area affected.The complex subsurface roughness coefficients in the downstream built-up area were processed using GIS,and a two-dimensional flood propagation mathematical model of Meilin Reservoir was established using the MIKE software.The flood propagation process under 6 working conditions was calculated based on the collapse time,and the inundation water depth and flood velocity of typical protection objects in the flood propagation process were statistically analyzed.The flood-affected area was divided into 6 different disaster zones based on the maximum inundation water depth and maximum flow velocity,and economic loss assessment was carried out.The results show that the collapse time,flood propagation distance,and duration are important factors affecting the flood disaster downstream,and the economic loss calculated based on the maximum inundation water depth is slightly higher than that calculated based on the maximum flow velocity.Based on the relevant conclusions,relevant suggestions for flood emergency evacuation in the downstream area of the reservoir were put forward.关键词
都市型水库/溃坝洪水/数值模拟/灾害损失评估Key words
urban reservoir/dam failure flood/numerical simulation/disaster loss assessment分类
建筑与水利
