秦淮河流域典型排涝泵站前池水质与降雨特征响应关系

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中文摘要：为分析排涝泵站前池水质与降雨特征的响应关系,对南京市城区秦淮河沿线2个排涝泵站前池水质以及降水量开展高频在线自动监测,结合回归树方法分析了不同降雨强度、前期干旱时间条件下排涝泵站前池水质变化规律,探讨了不同类型排涝泵站前池水质的主要影响因素.结果表明:晴雨天均有生活污水汇入的A泵站前池氨氮质量浓度在大雨强下降低,中雨强下先升高后降低,小雨强下平缓上升,A泵站前池污染物质量浓度主要受降雨强度和次降水量影响;主要接收降雨径流,雨量大时有生活污水溢流汇入的B泵站,前池污染物质量浓度在大雨强下先升高后逐渐降低,中雨强下降低,小雨强下变化不大,B泵站前池水质主要受次降水量、前期干旱时间和降雨强度影响;2个泵站前池CODMn质量浓度变化与降雨的响应规律相似,但更多受到与前期干旱时间关联的地表径流冲刷作用影响;连续降雨均导致泵站前池氨氮质量浓度和CODMn质量浓度波动变化较大,而前期干旱时间越长,降雨发生后泵站前池水质越差.

外文标题：Response relationship between water quality and rainfall characteristics in front pond of typical urban drainage pumping stations of Qinhuai River

外文摘要：To understand the response patterns of water quality in the front pond of drainage pumping station to rainfall characteristics,the high-frequency online automatic monitoring was carried out for water quality and rainfall at two drainage pumping stations along the Qinhuai River in Nanjing City.The regression tree method was used to analyze the variations in the water quality(ammonia nitrogen and CODMn)of typical urban drainage pumping stations under different rainfall intensities and previous drought duration conditions,and the main influencing factors of water quality for different types of drainage pumping stations were explored.Taking ammonia nitrogen as an example,the concentration in the front pond of drainage pumping station A,which receives the domestic sewage inflow during both rainy and non-rainy days,decreases under heavy rain intensity,increases first and then decreases under moderate rain intensity,and gradually rises under light rain intensity.The water quality concentration in the front pond of drainage pumping station A is mainly affected by the rainfall intensity and secondary rainfall.The water quality concentration in the front pond of drainage pumping station B,which mainly receives the rainfall runoff but also has the inflow of domestic sewage during heavy rainfall,firstly increases and then gradually decreases under heavy rain intensity,decreases under moderate rain intensity,and has little change under light rain intensity.The water quality concentration in the front pond of drainage pumping station B is mainly affected by rainfall,previous drought duration and rainfall intensity.The response patterns of CODMn concentration to rainfall in the front pond of the two pumping stations is similar,but the concentration of CODMn is more affected by the surface runoff erosion associated with previous drought duration.Continuous rainfall causes large fluctuations in the concentration of ammonia nitrogen and CODMn in the front pond of drainage pumping stations,and longer previous drought duration results in worse water quality in the front pond of drainage pumping stations after rainfall events.

外文关键词：

drainage pumping stationrainfall characteristicswater quality in the front pond of pumping stationresponse relationshipregression tree analysisQinhuai River in Nanjing City

作者：

徐荣、邓雅静、李一平、潘泓哲、刘军、柏松、商鹤琴、周玉璇、郑婉婷

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作者单位：

江苏省南京环境监测中心,江苏南京 210041

河海大学环境学院,江苏南京 210098

关键词：

排涝泵站降雨特征泵站前池水质响应关系回归树分析方法南京秦淮河

基金：

南京市环保科研课题资助项目江苏省环境监测科研基金项目国家自然科学基金项目

项目编号：

202101210152039003

出版年：

2024

DOI：

10.3876/j.issn.1000-1980.2024.01.002

河海大学学报(自然科学版)

河海大学

河海大学学报(自然科学版)

CSTPCD北大核心

影响因子：0.803

ISSN：1000-1980

年,卷(期)：2024.52(1)

参考文献量31