低影响开发系统对西南红层丘陵地区雨洪调控效果的模拟研究  

Simulation Study on the Effect of Low-impact Development System on Rainwater Control in Red Bed Hills in Southwest China

作　　者：梁芊 冯文凯[1,2] 黎一禾 魏昌利[3] LIANG Qian;FENG Wen-kai;LI Yi-he;WEI Chang-li(State Key Laboratory of Geohazard Prevention and Geoenvironment Protection,Chengdu University of Technology,Chengdu 610059,China;School of Environmental and Civil Engineering,Chengdu University of Technology,Chengdu 610059,China;Sichuan Geological Survey,Chengdu 610081,China)

机构地区：[1]成都理工大学地质灾害防治与地质环境保护国家重点实验室,成都610059 [2]成都理工大学环境与土木工程学院,成都610059 [3]四川省地质调查院,成都610081

出　　处：《科学技术与工程》2020年第15期6240-6245,共6页Science Technology and Engineering

基　　金：四川省自然资源厅科学研究计划(KJ-2018-12)。

摘　　要：为探究低影响开发系统(LID)对西南红层丘陵地区的雨洪调控效果,以中国遂宁市河东新区湿地公园示范区为研究对象,构建暴雨洪水管理模型(SWMM),根据遂宁市河东新区海绵城市建设相关规划,结合研究区下垫面特征,模拟不同降雨重现期(2、5、10、20年一遇)降水情景下低影响开发(LID)措施的地表径流过程和下渗过程,以评估海绵城市建设的防洪减涝效果。结果表明:在低降雨重现期(2年一遇和5年一遇)情况下,LID措施对地表径流的控制率分别达到78%和45%,洪峰的推迟现象不明显,在高重现期(20年一遇和50年一遇)情况下,地表径流控制率仅为2%和1%,洪峰的推迟时间分别为2、2.5 h,表明LID措施对城市雨洪控制有一定的效果,且随着降雨重现期的增加,LID措施对城市雨洪的控制效果逐渐减弱。研究结果为中国西南地区海绵城市建设及后期运营提供了理论依据。To explore the effect of low-impact development system(LID)on rain and flood control in red-bed hilly area in southwest China,the wetland park demonstration area in Hedong New District,Suining City,China was taken as the research object.To evaluate the flood control and waterlogging reduction effect of sponge city construction,a storm water management model(SWMM)was built,and the surface runoff process and infiltration process of low impact development(LID)measures were simulated under different rainfall recurrence periods(2,5,10,20 years).Results show that LID measures can control 78%and 45%of surface runoff flood in the case of low rainfall recurrence period(1 in 2 years and 1 in 5 years).However,the delay of flood peak is not obvious.In the case of high recurrence period(1 in 20 years and 1 in 50 years),the surface runoff control rate is only 2%and 1%,the delay time of flood peak is up to 2 h and 2.5 h.It is concluded that LID measures have a certain effect on urban rain flood control.As the recurrence period of rainfall increased,the control effect of LID measures on urban rain flood would weaken.The results provide a theoretical basis for the construction and later operation of sponge cities in southwest China.

关 键 词：低影响开发 暴雨洪水管理模型(SWMM) 降雨重现期 红层丘陵区 海绵城市 

分 类 号：TV121[水利工程—水文学及水资源]