摘要
针对水体富营养化评价具有模糊性和不确定性的多属性决策问题,提出联系数与三角模糊数耦合的富营养化综合评价方法。利用多元联系数描述评价因子与评价等级之间隶属关系的不确定性,采用分段三角模糊数确定联系数差异度系数的连续变化过程和模糊性,进而计算评价因子与评价等级之间的综合联系数,并结合评价指标组合权重确定级别特征值。应用该方法对2016年7月黄柏河梯级水库的富营养化状况进行了评价。结果表明:玄庙观水库处于贫营养状态,天福庙水库、西北口水库和尚家河水库均处于中营养状态。各水库富营养化程度排序为:尚家河水库>西北口水库>天福庙水库>玄庙观水库。该法所得结果与其它多种评价方法的结果对比表明,该方法评价结果直观有效,可以真实反映水库富营养化等级状况,能够更加细微、准确的区分同一等级水体富营养化差异,在湖库富营养化评价中具有良好的应用前景。
According to the characteristics of multi-attribute decision making, uncertainty and fuzziness during the process of eutrophication assessment, an integrated method is proposed for eutrophication comprehensive evaluation on the basis of multi- element connection number and triangular fuzzy numbers. Muhi-element connection number is applied to depict the uncertainty of subordinative relationship between the evaluation factors and evaluation grade. The triangular fuzzy numbers are used to express the continuous changing process and fuzziness of difference degree coefficient of connection number. Then, comprehensive connection number between the evaluation factors and grade is calculated, the characteristic value of evaluation grade is determined based on combination weight of the evaluation indexes. Eutrophication status of cascade reservoirs on the I-Iuangbaihe River in July, 2016 was evaluated as a case. The results showed that the eutrophication status of Xuanmiaoguan Reservoir was oligotrophic, and Tianfumiao Reservoir, Xibeikou Reservoir, Shangjiahe Reservoir were all mesotropher. Their eutrophication in the order were Shangjiahe Reservoir〉 Xibeikou Reservoir 〉 Tianfumiao Reservoir 〉 Xuanmiaoguan Reservoir. Compared with the results from some other widely used methods, the evaluation result in this paper was intuitive, effective and can reflect actually eutrophication status. Meanwhile, different from other methods, it could distinguish accurately internal differences at the same eutrophication level. This method has a good application prospects in assessment of lake and reservoir eutrophication.
出处
《长江流域资源与环境》
CAS
CSSCI
CSCD
北大核心
2017年第12期2129-2136,共8页
Resources and Environment in the Yangtze Basin
基金
宜昌市大学科学研究与应用项目(A16-302-a05)
国家自然科学基金项目(51409152)~~
关键词
黄柏河梯级水库
富营养化评价
联系数
三角模糊数
cascade reservoirs on the Huangbaihe River
eutrophication assessment i connection number
triangular fuzzy numbers
