北京水务Issue(5)：44-50,7.DOI:10.19671/j.1673-4637.2024.05.008
不同级别降雨对北运河水系汛期污染强度影响分析
Analysis of impact of different rainfall levels on pollution intensity of North Canal River during flood season
摘要
Abstract
To investigate the impact of different rainfall levels on pollution intensity in the Beiyun Riv-er system during the flood season,three typical rainfall events of varying levels in the summer of 2023 were selected to monitor pollution intensity.Using statistical methods,changes in the chemical oxygen demand CODcr pollution intensity of the main stream and four tributary outlets of the Beiyun River were analyzed,along with the peak and recovery times of CODcr concentration.The relationship between CODcr pollution intensity and rainfall levels in different parts of the river system during the flood season was also examined.The results showed that CODcr pollution intensity at the outlet sections of the main stream and four tributaries decreased as rainfall frequency increased during the flood season.During the first flood season rainfall,CODcr pollution intensity increased with rising rainfall levels.CODcr concen-tration also increased with higher rainfall with pollutant accumulation during extremely heavy rain-storms,which led to a deterioration in water quality at basin outlet sections.Differences were observed in the peak concentration and recovery times of pollutants across different watersheds under the same rainfall conditions,which might relate to the extent of road hardening in each watershed.The effective-ness of sponge city construction in the study area was analyzed to provide insights into the impact of rainfall on urban river water quality.关键词
降雨/北运河水系/汛期污染强度/化学需氧量Key words
rainfall/North Canal River/pollution intensity during flood season/chemical oxygen de-mand分类
资源环境引用本文复制引用
杜婷婷,刘波,孙春媛,周鑫..不同级别降雨对北运河水系汛期污染强度影响分析[J].北京水务,2024,(5):44-50,7.
