摘要
耦合一维(1D)管网/二维(2D)地表漫流模型可以准确描述城市地区的暴雨积水过程,特别是超设计标准暴雨造成的城市内涝的演进全过程。以合肥市杏花排水系统为例,构建1D/2D耦合模型,通过实测数据完成模型的率定验证,在50年一遇的极端暴雨条件下,模拟杏花系统的内涝演进。结果表明,该排水系统内地形起伏较大,道路调蓄涝水的能力差,且不能配合市政排水系统行泄涝水,在极端降雨条件下形成了严重的局部涝灾。本研究为根据内涝设计重现期校核城镇排水系统排除积水能力规定的实施提供了参考。
Coupling one-dimensional pipe flow with two-dimensional surface flow hydraulic model was capable of simulating rainfall-runoff process and draining process, especially flood propagation in ur- ban areas due to overflow of sewer system. A coupled 1D/2D model was developed for Xinghua Catch- ment in Hefei City and calibrated with historical records. It was applied to check floodwater drainage abil- ity for the catchment under a 50-year return period heavy storm. The results showed that the surface gra- dient of the catchment was high, the detention effect of roads in the catchment was poor, and most of floodwater ran downhill, which leaded to heavy flood in depression areas. This paper provides a reference for check of flooding frequency of urban drainage system.
出处
《中国给水排水》
CAS
CSCD
北大核心
2014年第15期155-158,共4页
China Water & Wastewater
基金
国家水体污染控制与治理科技重大专项(2011ZX07303-002)
关键词
耦合模型
城市排涝
内涝重现期
排涝校核
coupled model
urban flood drainage
waterlogging return period
flood check
