北京水务Issue(4)：13-20,8.DOI:10.19671/j.1673-4637.2025.04.003
永定河流域(北京丰台段)水质与夏季降雨关系研究
Characteristics of the causal relationship between water pollution in Yongding River Basin(Fengtai Section,Beijing)and the summer rainfall
摘要
Abstract
To study the relationship between rainfall and river pollutants,the Convergent Cross Mapping method was used to analyze the response of water quality to rainfall in the Fengtai section of the Yongding River Basin in Beijing,and to quantify the impact of different rainfall magnitudes and durations on pollutants.The results showed that during rainfall events,cumulative rainfall was the key driving factor for changes in ammonia nitrogen concentration,while hourly rainfall intensity played a dominant role in changes in chemical oxygen demand and permanganate index.Light rain and moderate rain had a dilution effect on chemical oxygen demand and permanganate index,while heavy rain and rainstorms showed a scouring effect.Rainfall mainly had a dilution effect on ammonia nitrogen,with rainstorms reducing 25.5％average ammonia nitrogen concentration.Persistent heavy rainfall had a greater impact on the change proportion of pollutant concentrations than short-term heavy rainfall.This study revealed the regulatory effect of meteorological factors on water quality,providing a scientific basis for basin pollution control.关键词
降雨/水质变化/收敛交叉映射算法/因果关系Key words
rainfall/variation of water quality/convergent cross mapping method/causality分类
天文与地球科学引用本文复制引用
白文蓉,张玉洁,尹思铭,张楠楠..永定河流域(北京丰台段)水质与夏季降雨关系研究[J].北京水务,2025,(4):13-20,8.基金项目
华北区域气象科技创新项目(HBXM202403) （HBXM202403）
