热带地理

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已建城市排水管网的排涝能力评估方法

唐清华1,何沛英2,朱志华2,张明珠1,刘浩1   

  1. (1.广州市水务科学研究所,广州 510220;2.中山大学 水资源与环境研究中心//华南地区水循环与水安全广东普通高校重点实验室,广州510275)
  • 收稿日期:2015-03-27 出版日期:2016-07-05 发布日期:2016-07-05
  • 通讯作者: 何沛英(1991―),男,广东人,硕士研究生,主要从事城市内涝方面的研究,(E-mail)771273557@qq.com
  • 作者简介:唐清华(1973―),女,河南人,水工建筑高级工程师,硕士,主要从事区域水文水资源、水环境监测的研究,(E-mail)sks2000@vip.163.com
  • 基金资助:

    国家自然科学基金项目(51210013、1479216);国家科技支撑计划(2012BAC21B0103)

Evaluation of Drainage Capability of Urban Pipelines

TANG Qinghua1,HE Peiying2,ZHU Zhihua2,ZHANG Mingzhu1,LIU Hao1   

  1. (1. Guangzhou Institute of Water Science,Guangzhou 510220,China;2. Center for Water Resources and Environment//Key Laboratory of Water Cycle and Water Security in South China for Guangdong Higher Education,Sun Yat-sen University,Guangzhou 510275,China)
  • Received:2015-03-27 Online:2016-07-05 Published:2016-07-05

摘要:

以SWMM 模型为平台构建已建城市区域排涝模型,以广州市芳村高尔夫地块为研究区域,基于研究区域实测降雨、径流等资料对模型进行参数率定和验证,模拟在不同暴雨重现期下已建城市区域雨水管网的排涝能力。研究结果表明:该区域遭遇2 a 一遇暴雨时,J14、J15 和J31 等3 个排水节点出现积水;当遭遇5 a 一遇时,J15 片区和J31 节点出现较为严重的积水,其中J15 和J31 节点积水量分别达到1 674、546 m³;积水时间分别为0.5、0.4 h。针对研究区域排水管网排涝能力偏低的现状,建议结合LID(Low Impact Development)措施,削减暴雨洪峰流量,提高区域排涝能力。文章构建的已建城市排水管网排涝能力评估方法,可识别区域主要积水黑点及管道满流管段,提供了一种动态、定性和定量评估排水管网能力的方法。

关键词: SWMM, 城市排水管网, 设计暴雨, 排涝能力评估

Abstract:

Based on measured precipitation and runoff data of the residential district in Guangzhou, China, this paper simulated the drainage capability of pipe network under different return period in resident district using calibrated SWMM. The results suggest that when faced with two years’ return period rainstorm, water would accumulated at Nodes J14, J15 and J31, and water accumulation would become more serious with increasing return period. When faced with five years’ return period rainstorm, accumulated water amounts at Nodes J15 and J31 were 1674m3 and 546m3, respectively, and accumulated water times were 0.5h and 0.4h, respectively. In view of low pipe drainage capability in our country, this paper suggested using LID measures to reduce peak flow of storm flood, so as to improve the existing drainage capability of the network. This paper built an assessment method of drainage capability for the existing urban pipe network, which not only could identify the main water spots and pipe flow section, but also could provide a dynamic, qualitative and quantitative evaluation of the ability of the drainage pipe network.

Key words: SWMM, urban pipelines, design storm, evaluation of drainage capability