基于耦合模型的城市建设项目洪涝安全评估及应对策略OA

Taking the construction project of Mingzhu Agricultural Comprehensive Center in Nansha District as an example,a coupled hydrodynamic model of one-dimensional river channel,two-dimensional surface,and internal pipeline network was constructed based on the overall view of the watershed system.The flood process around and inside the plot was simulated,and the waterlogging situation of the construction project plot after the current situation,planning,and remediation measures were analyzed.The analysis results show that:①The construction project's eastern side,along Eryong North Road,is significantly affected by the backwater effect of the river flood level.Within the project site,the impact of the river flood level backwater is relatively minor.Overflow points along Eryong North Road and within the project site are primarily located in low-lying areas,and the overflow analysis results align with the actual conditions;② Under the current circumstances,the flood risk level of the construction project plot under the 100 year return period design rainstorm condition is medium,and corresponding measures are urgently needed;③ Under the planning situation,the flood risk level of the construction project plot is low under the design rainstorm with 100 year return period;④ The flood risk level of the construction project plot is reduced to low level under the design rainstorm condition with 100 year return period after the rectification measures of"external retaining and internal drainage,storage and drainage combination"are taken,and the rectification measures are reasonable and reliable.By extending the flood safety assessment of operational construction projects from evaluation to rectification,the problem of insufficient preliminary demonstration and the need for rework,renovation,and expansion of construction projects after being put into operation has been solved.