摘要
水环境质量评价与变化趋势分析是水环境管理的重要内容,对于制定水环境保护规划具有重要的意义。模糊数学方法在水质评价中得到了广泛的应用,而权重的计算是模糊综合评价中最为重要的部分,以岷江下游2004年至2008年3个例行监测断面资料为依据,采用熵权法赋权对水质进行了分级评价,并与采用传统权重计算法的评价结果进行了比较,结果表明熵权法评价客观合理,3个监测断面各年水质均属于《地表水环境质量标准》中的Ⅰ类;此外,采用Daniel趋势检验方法,计算了岷江下游主要污染物的变化趋势,结果表明在评价时段内河口渡口断面NH3-N和CODMn浓度呈下降趋势,变化趋势有显著意义,月波断面和凉姜沟断面主要污染物稳定,变化不显著。
Water quality assessment and trend analysis were important parts of water environment management and were important for establishing water environment protection program.The fuzzy synthetic evaluation had been applied to water quality assessment broadly,and calculating weight coefficient was the most important part in fuzzy synthetic evaluation.The entropy method was established and was applied to evaluate water quality of three monitoring sections of the lower reach of the Minjiang River from 2004 to 2008.The result showed that entropy method was reasonable compared with calculating weight coefficient using traditional method,and water quality of all monitoring sections in all years belonged to classⅠin Quality Standard of Surface Water Environment.Furthermore,the Daniel trend analytical method was established and was applied to evaluate the change of main pollutants of the lower reach of the Minjiang river.The result showed that concentration of CODMn and NH3-N were degradative and the changes were significant in the monitoring section of Hekoudukou,and the changes remained steady in the monitoring sections of Yuebo and Liangjianggou.
出处
《长江流域资源与环境》
CAS
CSSCI
CSCD
北大核心
2010年第S2期172-176,共5页
Resources and Environment in the Yangtze Basin
基金
国家科技支撑计划(2008BAK51B07)
国家科技支撑计划(2008BAK51B01-2-1)
关键词
熵权法
岷江下游
水质评价
趋势分析
entropy method
lower reach of Minjiang River
water quality evaluation
trend analysis
