长江苏州段水质变化及七浦塘引水对阳澄湖水质影响分析
Analysis of Water Quality Changes in the Suzhou Section of Yangtze River
谢茂嵘 1刘帅 1吕文 1孙捷琼 1史书 1白瑞泉 1沈逸 1张冲1
作者信息
- 1. 江苏省水文水资源勘测局苏州分局,江苏 苏州 215011
- 折叠
摘要
根据2019-2022年长江苏州段水质各指标数据,分析变化趋势.结果表明,全年7月份的水质质量最差,超标主要项目为氨氮和溶解氧;夏季的水质较其他季节稍差,超标主要项目为溶解氧;2022年水质较前几年好转,Ⅱ类水断面占比上升,不达标月份减少,测次达标率集中在90%以上.溶解氧、总磷、总氮呈明显的季节性变化规律,溶解氧和总氮的含量冬春较高,夏秋较低;总磷变化规律则相反,冬春较低,夏秋较高.七浦塘引水工程对周边地区水质改善明显,七浦塘与阳澄湖引水期溶解氧、氨氮和总磷均显著优于排水期.
Abstract
According to the data of various indicators of water quality in the Suzhou section of Yangtze River from 2019 to 2022,the change trend was analyzed.The results showed that the water quality in July of the whole year was the worst,with ammonia nitrogen and dissolved oxygen being the main indices exceeding the standard.The water quality in summer was slightly worse than other seasons,and the main index exceeding the standard was dissolved oxygen.The water quality in 2022 was better than the previous years,and the proportion of Class Ⅱ water sections had increased,the number of substandard months had decreased,and the rate of measurement times was concentrated at more than 90%.Dissolved oxygen,total phosphorus and total nitrogen showed obvious seasonal variation.The contents of dissolved oxygen and total nitrogen were higher in winter and spring and lower in summer and autumn.On the contrary,the concentration of total phosphorus was lower in winter and spring and higher in summer and autumn.The water diversion project of Qiputang improved the water quality in the surrounding areas obviously.The dissolved oxygen,ammonia nitrogen and total phosphorus in the water diversion period of Qiputang and Lake Yangcheng were significantly better than those in the drainage period.
关键词
水质/季节性变化/七浦塘引水/阳澄湖水质/长江苏州段Key words
water quality/seasonal variation/Qiputang water diversion/the water quality of Yangcheng Lake/Suzhou section of Yangtze River引用本文复制引用
基金项目
苏州市水利水务科技项目(2020001)
苏州市水利水务科技项目(2021006)
苏州市水利水务科技项目(2022002)
江苏省水利科技项目(2021069)
苏州市科技发展计划(社会发展科技创新)面上项目(2022SS22)
出版年
2024
NETL
NSTL
万方数据