北京市河流不同水期水质特征及汛期水质改善对策研究

Water Quality Characteristics of Different Water Periods in Beijing River and Countermeasures on Water Quality Improvementin Flood Season

分析北京市河流不同水期水质特征,提出汛期水质改善对策,为北京市水环境持续改善提供支撑。基于北京市2020年汛期、2021年汛期、2022年全年104条段典型河流的水质数据,从不同时空尺度对水质特征进行分析。结果表明,2022年汛期较非汛期水质有所变差,近三年来汛期水质整体呈现向好态势;就五大水系而言,北运河水系劣Ⅴ断面居多;从五大区域上看,非汛期平原新城的劣Ⅴ断面最多,汛期除核心区外,均存在劣Ⅴ断面,中心城区的最多。此外,为保障汛期水质达标,从短期和长期手段上提出对策。

Inorderto provide support for the continuous improvement of water environment quality in Beijing,the characteristics of water quality were analyzed during different water periods and the countermeasures for improving water quality in flood season were proposed.Based on the water quality data of the 104 typical rivers in Beijing in flood season in 2020,2021,and 2022from official website of Beijing Municipal Ecology and Environment Bureau,thecharacteristics of water quality were analyzed from different space-time standards.The results showed the water quality in flood season in 2022 was worse than that in non-flood season,and the water quality in flood season had shown a good trend in the past three years.As far as the five river basins were concerned,the North Canal River existed the most inferiorⅤsections.In terms of five regions,Plain New City existed the most inferiorⅤin non-flood season;there were inferiorⅤsections except the core region in flood season,The Central City existed the most inferiorⅤ.In addition,short-term and long-term suggestions were put forward to ensure thatwater quality reaches the standard in flood season.