摘要
运用模糊集合论中的权距离概念结合隶属度的模糊评价方法 ,以化学耗氧量、总无机氮、活性磷酸盐和生物学参数叶绿素a为指标 ,对浙江北部沿海的富营养化状况进行了评价。评价过程中的重要性权向量通过改进的层次分析法来确定 ,并对评价指标重要性比较矩阵进行了不同的调整和对比分析 ,评价结果以隶属法和累加法两种方式给出。结果表明 ,浙江北部沿海约 76 .6 %的调查海域处于中营养和中富营养状态之间 ,低于和高于此状态的约分别占 16 .6 %和 6 .7% ;评价指标重要度的不同排列会对最终评价结果产生影响 ;累加法的评价结果比隶属法更接近接近实际 ;
Depend on the indices of COD, T N, PO 4 P and chlorophy11 a, the eutrophication in the north of Zhejiang coast was assessed by the method that associated with weighing distance and subordinative degrees of fuzzy set theory. In the course of the assessment, the significance weighing vector was determined by the modified hierarchy analyzing method and the significance compared matrix of the assessment indices was adjusted. The assessment results were given in two ways of subordinative and accumulative methods. The results showed that the area with middle and middle high eutrophication were 76.6% of the researched area, while the area with lower and higher than that being 16.6% and 6.7% respectively. The different arranges of assessment indices influenced the final assessment results, and the accumulative method was of higher exactitude than the subordinative method for describing status of eutrophication. The further research needs to be carried out on the relativity between ertrophication and algae bloom.
出处
《水产学报》
CAS
CSCD
北大核心
2001年第1期74-78,共5页
Journal of Fisheries of China
基金
国家教委资助项目! (1999-36 3)
