三峡库区小江流域水体富营养化的模糊评价  

Fuzzy Assessment of Water Utrophication for Xiaojiang River Basin in Three Gorges Region

作　　者：裴廷权[1] 王里奥[1] 韩勇[2] 马培东[1] 王华梁[1] 董婧蒙[1] 

机构地区：[1]重庆大学资源及环境科学学院,重庆400030 [2]重庆市环境保护局,重庆400015

出　　处：《农业环境科学学报》2008年第4期1427-1431,共5页Journal of Agro-Environment Science

基　　金：重庆市发展和改革委员会,重庆市科学技术委员会项目(03-26)

摘　　要：通过对三峡库区典型次级流域——小江水域水体实测,提出了三峡库区次级流域的评价体系及评价方法。考虑到富营养化评价标准和影响因子的不确定性,建立不同的评价指标所对应的隶属度函数,确定其权重系数和模糊综合指数。并结合库区消落带水体实际情况,选用叶绿素a(Chla)、透明度(SD)、TP、TN和CODMn为参数进行模糊综合评价。结果表明:SD、Chla、TP、TN和CODMn含量差异很大,含量范围分别为:1.2～3.5m、2.12～37.04mg·m-3、0.026～0.103mg·L-1、0.681～1.643mg·L-1、1.15～3.05mg·L-1。CODMn对水质富营养化的贡献率最小,Chla、SD、TP和TN是水体中主要的污染因子。在春夏季,水域大多处于中度富营养化状态。与其他评价方法相比,该方法具有操作简单、评价客观等优点。Based on water quality investigation about typical tributary-Xiaojiang watershed of Three Gorges Region, an assessment system and evaluation method are proposed on zoning of typical tributary in Three Gorges Region. Accounting into the human-dlvlded level indeterminacy of utrophication evaluation standard and influencing factors, establishing the corresponding membership functions of different valuation indices, ascertaining the value of weight and fuzzy comprehensive indexes. Combining the actual situation with water-level-fluctuating in reservoir area. Five valuation indexes including transparency （SD）, chlorophyll-a（Chla）, TP, TN, and CODM. are selected to evaluate the eutrophication by using comprehensive evaluation method. The results show that value of SD .Chla.TP.TN and CODM. are quite different, which are 1.2-3.5 m, 2.12-37.04 mg·m^-3, 0.026-0.103 mg·L^-1, 0.681 ～1.643 mg·L^-1, 1.15-3.05 mg·L^-1 respectively. The contribution rate of CODM.for water eutrophication is the least, the major pollutant factors are Chla, SD, TP, and TN in water. Xiaojiang river water is in middle eutrophication state in spring or summery, the water quality of reservoirs has different eutrophication trend. Compared with other assessment methods, which have the advantages such as simple operation and objective evaluation, comprehensive evaluation method is reasonable and practicable, It also could reflect the variety of good or bad quality for the reservoir area. Further study must start urgently and new countermeasures could be found consequently, which provides reference for pollution control and comprehensive utilization in reservoir area.

关 键 词：三峡库区 次级河流 富营养化 模糊评价 模型 

分 类 号：X824[环境科学与工程—环境工程]