长江干流水质变化趋势研究  

Water Quality Change Trends in the Main Stream of Yangtze River

作　　者：董文逊 张艳军[2] 王素描 吴金津 赵建华 许昕 邹薏轩 

机构地区：[1]武汉大学水资源与水电工程国家重点实验室,湖北 武汉 [2]武汉大学水资源与水电工程国家重点实验室,湖北 武汉张艳军

出　　处：《水资源研究》2020年第2期150-158,共9页Journal of Water Resources Research

基　　金：本文由国家重点研发计划(2017YFA0603704)资助。

摘　　要：利用攀枝花等12个主要的水质监测控制断面于2008~2018年间实测水质资料中的高锰酸盐指数(CODmn)、五日生化需氧量(BOD5)、氨氮(NH3-N)和总磷(TP)4个水质项目数据,通过转化为河流水质标识指数,探讨长江干流水质的变化趋势情况,并采用Mann-Kendall趋势检验和季节性Kendall趋势检验两种方法,对长江干流水质的变化趋势进行了分析研究。研究结果表明:1) 近十年以来,无论是在年尺度上还是月尺度上,长江干流水质在不断好转并呈现出继续好转或逐渐稳定的趋势,综合水质基本在III类水质标准;2) 除TP指标多处于III类水质标准范围内,CODmn、BOD5和NH3-N三个指标在II类水质标准范围内波动;3) 长江干流的CODmn、BOD5、NH3-N和TP四项指标基本能够满足水质管理目标,但BOD5指标有上升的趋势。Four different types of water quality data, including CODmn, BOD5, NH3-N and TP, in the 12 water quality monitoring sections from 2008 to 2018, which are converted into the single factor water quality identi-fication indexes, are used to analyze the trend in the main stream of the Yangtze River. Meanwhile, the Mann-Kendall trend test and the seasonal Kendall trend test are used in this paper. The results show that: 1) in the past ten years, both on the annual and monthly scales, the water quality of the main stream of the Yangtze River has continued to be better and has shown a trend of improvement or gradual stabilization;2) the comprehensive water quality is basically below the grade III level. The three indexes CODmn, BOD5 and NH3-N meet the grade II level, except that the TP mostly meets the grade III level;3) the concentration of the CODmn, BOD5, NH3-N and TP in the main stream meet the management target basically, but the concentration of BOD5 has a rising trend.

关 键 词：水质 趋势分析 单因子水质 标识指数 长江干流 

分 类 号：X70[环境科学与工程—环境工程]