关键词: 城市内涝, 平原区, MIKE FLOOD, 排涝耦合模型, 华容县, 湖南省

Abstract: With the acceleration of the urbanization process,urban waterlogging problems are becoming more and more serious in China.In order to mitigate the urban waterlogging problems,we investigated the current waterlogging problems in Hunan Province and analyzed the causes.We constructed coupling model of urban waterlogging by MIKE FLOOD to simulate waterlogging in Hexi area of Huarong County in the typical plain area.The results showed that:(1) Drainage capacity of pipe network was inadequate as a result of some unreasonable pipeline layout in Huarong County.(2) It was impossible to drain rainwater within 24 hours at The Experimental Primary School and the Old Tobacco Bureau,so they were prone to waterlogging.(3)The maximum depth ratio of 61% pipelines was between 2 and 4,which was prone to full load and had a bad effect on service life of pipelines.(4)The Hucheng port could avoid waterlogging through drainage of the Malisi pumping station.Besides,increasing regulation and storage area of Tianjia Lake could improve drainage capacity in the study area.According to results,some suggestions on construction and management of urban drainage engineering are put forward.

Key words: urban waterlogging, plain area, MIKE FLOOD, drainage coupling model, Huarong County, Hunan Province;