海绵城市雨水花园水文水质过程模拟
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摘要
以宜兴市中心某区域为例,通过参数率定及模型验证,构建了研究区域的SWMM模型,研究了不同重现期(3、10、50、100年)下,雨水花园水文、水质变化情况。结果表明,重现期3～100年条件下,平均径流量、峰值流量、平均径流系数、入渗量、污染物SS负荷总量、COD负荷总量、TN负荷总量、TP负荷总量分别降低11.65%～12.66%、6.82%～8.46%、21.33%～23.26%、22.42%～22.81%、8.98%～10.08%、8.73%～9.84%、7.83%～9.09%、6.36%～8.33%,雨水花园可有效降低平均径流量、峰值流量、平均径流系数,增加入渗量,对污染物SS、COD、TN、TP的负荷总量也有较好的控制效果,为一种有效的海绵措施,且不受降雨重现期大小的影响,呈较为固定的范围。
A storm water management model(SWMM)was constructed through parameter calibration and model validation for an urban area of Yixing City.The purpose is to study the hydrological and water quality changes of rainwater gardens in different recurrence periods(3,10,50,100 years).The results show that under recurrence periods 3～100 years,the reductions of the average runoff,peak flow,the average runoff coefficient,the infiltration volume and the corresponding load reductions of SS,COD,TN and TP are 11.65%-12.66%,6.82%-8.46%,21.33%-23.46%,22.42%-22.81%,8.98%-10.08%,8.73%-9.84%,7.83%-9.09%,6.36%-8.33% respectively.Rainwater garden,as an effective sponge measure,can effectively reduce the average runoff,peak flow and average runoff coefficient,as well as increase infiltration and control the total load of SS,COD,TN and TP in the study area.And it is not affected by the size of rainfall recurrence period,showing a relatively fixed range.
A storm water management model(SWMM)was constructed through parameter calibration and model validation for an urban area of Yixing City.The purpose is to study the hydrological and water quality changes of rainwater gardens in different recurrence periods(3,10,50,100 years).The results show that under recurrence periods 3～100 years,the reductions of the average runoff,peak flow,the average runoff coefficient,the infiltration volume and the corresponding load reductions of SS,COD,TN and TP are 11.65%-12.66%,6.82%-8.46%,21.33%-23.46%,22.42%-22.81%,8.98%-10.08%,8.73%-9.84%,7.83%-9.09%,6.36%-8.33% respectively.Rainwater garden,as an effective sponge measure,can effectively reduce the average runoff,peak flow and average runoff coefficient,as well as increase infiltration and control the total load of SS,COD,TN and TP in the study area.And it is not affected by the size of rainfall recurrence period,showing a relatively fixed range.
引文
[1]梁东.西咸新区海绵城市规划建设实施研究[D].西安:西安建筑科技大学,2016.
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[7]程桂.海绵城市水文水质过程模拟与关键技术研究---以宜兴市某试验区为例[D].苏州:苏州科技大学,2017.
[8]李海燕,岳利涛,黄延.SWMM中典型水质参数值确定方法的研究[J].给水排水,2011,37(S1):159-162.
[9]胡爱兵,李子富,张书函,等.城市道路雨水水质研究进展[J].给水排水,2010,36(3):123-127.
[10]陈韬,李研,李业伟,等.城市雨水水质模拟研究进展[J].市政技术,2014,32(3):115-121.
[11]熊赟,李子富,胡爱兵,等.某低影响开发居住小区水量水质的SWMM模拟[J].中国给水排水,2015,31(17):100-103.
[2]任南琪.海绵城市建设理念与对策[J].城乡建设,2018(7):6-11.
[3]郑克白.作为源头减排重点,建筑与小区要怎么做?[J].环境经济,2017(24):54-55.
[4]罗红梅,车伍,李俊奇,等.雨水花园在雨洪控制与利用中的应用[J].中国给水排水,2008,24(6):48-52.
[5]车伍,李俊奇.城市雨水利用技术与管理[M].北京:中国建筑工业出版社,2006.
[6]李卓熹,秦华鹏,谢坤.不同降雨条件下低冲击开发的水文效应分析[J].中国给水排水,2012,28(21):37-41.
[7]程桂.海绵城市水文水质过程模拟与关键技术研究---以宜兴市某试验区为例[D].苏州:苏州科技大学,2017.
[8]李海燕,岳利涛,黄延.SWMM中典型水质参数值确定方法的研究[J].给水排水,2011,37(S1):159-162.
[9]胡爱兵,李子富,张书函,等.城市道路雨水水质研究进展[J].给水排水,2010,36(3):123-127.
[10]陈韬,李研,李业伟,等.城市雨水水质模拟研究进展[J].市政技术,2014,32(3):115-121.
[11]熊赟,李子富,胡爱兵,等.某低影响开发居住小区水量水质的SWMM模拟[J].中国给水排水,2015,31(17):100-103.