基于SWMM住宅小区LID措施降雨径流削峰及控污功效研究

发布时间：2018-05-04 02:10

本文选题：LID + SWMM　；参考：《武汉理工大学》2015年硕士论文

【摘要】：城市化建设改变了流域的水文特性,原有的雨水排水系统不堪负重,很多城市都出现了不同程度的洪涝灾害,初雨的径流污染更影响了水体的环境,基于源头控制的低影响开发(LID)技术被引入。武汉市是城市圈大、湖泊河流污染严重的典型城市,解决洪涝灾害,控制径流污染,成为武汉的一个重要课题。研究LID技术对雨洪管理的效能,弥补雨水管理措施上的欠缺,对改善武汉市的现状具有重要意义。本文以武汉市保利拉菲小区为研究对象,选取适宜的LID措施,利用SWMM软件构建了研究区域的水力水质模型,对小区设置LID措施前后的水量水质进行了模拟,得到了针对不同需求的LID组合方案,提出了武汉市LID设置标准。本文的主要研究结论如下:(1)对保利拉菲小区开发前后的降雨径流的模拟结果表明,开发后径流量提高幅度较大。(2)模拟得到了设置单一LID措施后排出口P1的流量过程线,以及不同重现期条件下不同措施对径流峰值的削减率。(3)提出了武汉市以削峰为主要功能LID组合方案的设置标准:70%渗透铺装(停车场及人行道面积的70%为渗透铺装,占小区总面积的6.25%);30%下凹式绿地(下凹式绿地为绿地面积的30%,占小区总面积15.3%),下凹深度为125mm;分流式调蓄池设置标准为267m3/10000m2硬化面积,分流管偏移5-6cm。(4)得到了截流式调蓄池(200m3/10000m2硬化面积)、30%下凹式绿地、微型调蓄池(45m3/10000m2硬化面积)、分流式调蓄池(135m3/10000m2硬化面积)、70%渗透铺装对径流中污染物的削减率。(5)得到了分别控制15mm和25mm降雨的LID组合方案的设置参数。(6)提出了武汉市兼具削峰和控污功能LID组合方案的设置标准:当30%下凹式绿地且下凹深度为125mm、70%渗透铺装时,对应P=10a的降雨,截流式调蓄池设置标准宜取500 m3/10000m2硬化面积。对单一LID措施和LID组合方案的模拟分析结果,可为LID在武汉地区的推广应用可提供技术支持。
[Abstract]:The construction of urbanization has changed the hydrological characteristics of the watershed, the original drainage system of Rain Water is overloaded, many cities have suffered different degrees of flood disaster, and the runoff pollution of the initial rain has even affected the water body environment. Low impact Development (LID-based) based on Source Control was introduced. Wuhan is a typical city with large urban circle and serious pollution of lakes and rivers. It is an important subject to solve flood disaster and control runoff pollution in Wuhan. It is of great significance to study the effectiveness of LID technology in rain and flood management and to make up for the shortage of Rain Water's management measures to improve the present situation of Wuhan. In this paper, taking Baoleifei district in Wuhan as the research object, selecting suitable LID measures, using SWMM software to construct the hydraulic water quality model of the study area, and simulating the quantity and quality of water quality before and after the LID measures are set up in the residential area. The LID combination scheme for different needs is obtained, and the LID setting standard of Wuhan City is put forward. The main conclusions of this paper are as follows: 1) the simulation results of rainfall runoff before and after the development of Poly Lafi district show that the runoff increases greatly after development. (2) the flow process line of exit P1 after setting a single LID measure is obtained by simulation. And the reduction rate of runoff peak value by different measures under different recurrence period.) the setting standard of LID combination scheme with peak cutting as the main function in Wuhan is put forward. The standard of seepage pavement is 70% (70% of parking lot and sidewalk area is permeable pavement). It accounts for 6.25% of the total area of the residential area and 30% of the total area of the residential area. (the concave greenbelt is 30% of the green area, the total area of the plot is 15.3mm, the depth of the concave is 125mm, and the setting standard of the shunt storage pool is 267m3/10000m2 hardened area. The shunt tube offset 5-6 cm. 4) the closed type storage tank (200m3 / 10000m2) has a hardened area of 30% concave green space. The reduction rate of pollutants in runoff by 70% permeable surfacing of 45 m3 / 10000m2 hardened area and 135m3 / 10000m2 hardened area of split storage tank was obtained. The setting parameters of LID combination scheme for controlling 15mm and 25mm rainfall respectively were obtained. The setting parameters of LID combination scheme for controlling rainfall of 15mm and 25mm were put forward. Setting standard of LID combination scheme with peak cutting and pollution control function: when 30% concave green space with a concave depth of 125 mm or 70% penetration pavement, According to the rainfall of Pu 10a, the setting standard of the intercepting storage tank should be 500 m3/10000m2 hardening area. The simulation results of single LID measure and LID combination scheme can provide technical support for the popularization and application of LID in Wuhan area.
【学位授予单位】：武汉理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：X52;TU992

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