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作 者:张航 陈亚 ZHANG Hang;CHEN Ya(Lower Changjiang River Bureau of Hydrology and Water Resources Survey,Bureau of Hydrology,Changjiang Water Resources Commission,Nanjing 210011,China)
机构地区:[1]长江水利委员会水文局长江下游水文水资源勘测局,江苏南京210011
出 处:《水利水电快报》2023年第4期123-127,135,共6页Express Water Resources & Hydropower Information
摘 要:为掌握长江大保护开展以来长江干流水质状况,以长江下游干流为例,采用单项水质因子评价法,对8个干流控制断面2016~2020年的水质实测资料进行了分析。结果表明:过去氨氮、总磷是长江下游干流的主要超标因子,但随着长江大保护工作的持续推进,氨氮、总磷浓度值逐渐减小,2020年干流监测断面均已达到地表水Ⅲ类水,说明长江下游干流水质恢复趋势良好,长江大保护已初见成效。In order to understand the improvement of water quality of the main stream of the Yangtze River since the implementation of the Yangtze River protection program,taking the main stream of the lower reaches of the Yangtze River as an example,the measured data of water quality of eight control sections of the main stream from 2016 to 2020 were analyzed by using the single water quality factor evaluation method.Results showed that the ammonia nitrogen,total phosphorus was the main standard factor of the changjiang river main stream,but as the Yangtze river protection continues to advance,ammonia nitrogen,total phosphorus density decreases,the main monitoring cross section had reached 2020 water surface waterⅢclass,description of the changjiang river main stream water quality trend was good,the Yangtze river protection had paid off.
关 键 词:水质变化 单项水质因子评价 长江下游干流 长江大保护
分 类 号:X52[环境科学与工程—环境工程]
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