萍乡市城市地表径流污染物浓度变化特征分析及数值模拟

第32卷第2期2021年4%

Voi.02No.2

Apc.,2021水资源与水工程学报

JoomaI of Watec Resoones&Watec Enyineeriny

DOI：10.11705/ji ion.1077-643X.2021.22.22

萍乡市城市地表径流污染物浓度变化

特征分析及数值模拟

裴青宝1,,黄监初3,桂发亮1,,王海伟0

(0南昌工程学院，江西南昌330099；2.江西省水工程安全与资源高效利用工程研究中心，

江西南昌330099； 3.江西省宜春市水文局，江西宜春336000)

摘要：以海绵城市建设试点城市萍乡市地表径流污染物(以SS和TP为代表)浓度变化特征与预测模型适应性为研究对象，根据两场次的降雨资料及实测径流污染物浓度数据，确定所建地表径流污染物浓度变化预测模型Samoa-Boyd和p/r模型的参数，并模拟和分析了地表径流污染物浓度变化过程。结果表明：萍乡市地表径流污染物(SS和TP)浓度受初始冲刷效应的影响，降雨过程前期随雨强的峰值而达到最大，降雨过程后期污染物浓度受雨强的峰值波动影响较小;受模型参数的影响,Sartor-Boyd模型模拟值的统计学指标RPD、R、NSE均小于p/r模型的相应指标/r 模型对萍乡市降雨地表径流污染物排放规律的预测精度较好，模型可信度较高。结合萍乡市地区降雨状况建立的p/r 数学模型可为该区域海绵城市建设过程中地表径流污染物浓度的预测及管理提供参考。

关键词：海绵城市；地表径流；污染物浓度；数值模拟；萍乡市

中图分类号：X52文献标识码：A文章编号：1672-643X(2021)02-0010-06

Charocterisho analysit and numericoi simulation of pollutani concentrotion changet of urban strface runoff O Pingxiang City

PEI Qingbao1，,HUANG Jianchu3,GUI Faliang1，,WANG Haiwei1

(1.Naachang enstaute cf Techaolofy,Nanchang330099,China； 2.Jiangxi Engineering Research Center sf

Watrs Engineering Safeta ang Resources Efficieat Utilization,Nanchang330099,China；

3.Jichua Cit，a Hydrolofy Bureau cf'Jiangxi Province,Yichuc336400,China)

Abstroct:The000x0100cCaractemstici of pollutants(renresenteb by SS and TP)and the aPaptaPilite of pnbiction moOeIs of snmpcc mnol in Pinyxiany City-a pilot city foc sponye city ccnstmctioc,are stuU ied.Two sets of rainfalI data and measnred concentration data of mnoO pollutants are used te determine the parameter-of the Same一Boyd and p/r prebiction moOeIs,and the evolution process of pollutant cecoxtm) tion in snnace mnoO are analyzeb and simulateb.The resnlts show that the concentrations of snnace mnoO pollutants(SS and TP)in Pinyxiany City are Pfected by the benefit of initiaI sconmny and their peaC volues in the initiaI rainfalI pemoO reach the maximum with the peaC of rainfalI intensity-whereas the cecoxtm) tiocs of the pollutants decrease oyvioysty in the later pemoO of rainfalI,which are unUkVy te be aPected by the peaC Ouctuatioy of rainfalI intensity.RestWcteX by the moOel parameters,the staPsticaI indicator-snch cRSD,R0and NSE of the Same-Boyd moOel are alI lower than those of the p/r moOel,and the p/r moOel has prediction accaracy for the snnace mnoO pollutant dischame law in Pinyxiany Cod,so this moOeI is more feasibie.The p/r mathematicai moOel estaClisPeb in combination with the rainfalI situation of Piiiyc) iany City can provibe some reference for the prebiction and manaeemext of pollutant concentration in the snnace mnoO durmy the ccnstmction of sponye city in the myioc.

Key woi'ds：sponye city；snmpce mnoO;pollutant concentration;ncmemcai simulation;Pinyxiany City

收稿日期：2019-07)17；修回日期：2019-10)11

基金项目：江西省教育厅科技项目(GJJ10499);江西省水利厅科技项目(KT201022)

作者简介:裴青宝((933-),男，甘肃兰州人，博士，讲师，主要从事水资源高效利用、海绵城市等方面研究。

通讯作者:桂发亮(1267-),男，江西南昌人，博士，教授，主要从事水文水资源等方面研究。