重庆主城区降雨径流污染特征及其社会影响因素分析
Characteristics of rainfall-induced runoff pollution and its social influencing factors in main urban area of Chongqing City
陈亚松 1闫玉亭 2朱雅婷 1张文龙 2赵云鹏 1李轶2
作者信息
- 1. 中国长江三峡集团有限公司长江生态环境工程研究中心,北京 100038
- 2. 河海大学环境学院,江苏 南京 210098
- 折叠
摘要
为解析重庆主城区社会影响因素对降雨径流水质的影响,对 2010-2021 年政策影响下降雨径流水质的年际变化和降雨径流污染物指标进行相关性分析,采用对数平均迪氏指数法量化人口规模、技术创新、经济发展、产业结构4 种社会影响因素对降雨径流水质的影响.结果表明:重庆主城区降雨径流水质呈改善趋势,且污染物指标相关性增强,2019 年屋面降雨径流水质和2021 年路面降雨径流水质均提升到"较清洁与污染"之间,固体悬浮物与COD、NH3-N、TN、TP呈显著相关关系(p＜0.01),屋面降雨径流中相关系数r＞0.75,路面降雨径流中相关系数r＞0.50;空气治理政策对屋面径流污染改善效果显著,海绵城市和排水系统建设政策的有效实施则对路面径流污染控制效果显著;社会影响因素中技术改善效应和产业结构效应对水质改善起主导作用,经济发展效应和人口规模效应对水质改善呈负向作用.
Abstract
To investigate the influence of social factors on the water quality of rainfall-induced runoff in the main urban area of Chongqing City,this study analyzed the inter-annual variations in the water quality of rainfall-induced runoff under policy influences from 2010 to 2021 and conducted a correlation analysis of pollutant indicators of rainfall-induced runoff.The logarithmic mean divisia index decomposition model was employed to quantify the effects of population size,technological innovation,economic development,and industrial structure on the water quality of rainfall-induced runoff.The findings revealed an improving trend in the water quality of rainfall-induced runoff in the main urban area of Chongqing City,accompanied by enhanced correlation between pollutant indicators.The water quality of roof runoff in 2019 and pavement runoff in 2021 improved to the range of"slightly clean to polluted".Suspended solids demonstrated significant correlations with COD,NH3-N,TN,and TP(p＜0.01),with the correlation coefficient r＞0.75 for roof runoff,and r＞0.50 for pavement runoff.The air control policies have a significant effect on reducing roof runoff pollution,while effective implementation of sponge city and drainage system construction policies plays a crucial role in controlling pavement runoff pollution.Technological innovation and industrial structure are the dominant factors affecting the runoff water quality,while economic development and population size have negative effects on water quality improvement.
关键词
降雨径流污染/社会影响因素/内梅罗综合污染指数/LMDI分解模型/重庆主城区Key words
rainfall-induced runoff pollution/social influencing factors/Nemerow comprehensive pollation index/LMDI decomposition model/main urban area of Chongqing City引用本文复制引用
基金项目
中国长江三峡集团有限公司自主科研项目(WWKY-2021-0475)
出版年
2024
国家科技期刊平台
NSTL
万方数据