Comprehensive evaluation of heavy metal contamination of sediment in Lake Dianchi by using modified AHP method and ^(137)Cs dating
Comprehensive evaluation of heavy metal contamination of sediment in Lake Dianchi by using modified AHP method and 137Cs dating作者机构：School of Geographic and Oceanographic SciencesNanjing UniversityNanjing 210093China State Key Laboratory of Soil Sustainable AgricultureInstitute of Soil SciencesChinese Academy of SciencesNanjing 210008China
出 版 物：《Frontiers of Environmental Science & Engineering》 (环境科学与工程前沿（英文）)
年 卷 期：2008年第2卷第3期
页 面：370-379页
核心收录：
学科分类：070902[理学-地球化学] 0709[理学-地质学] 07[理学]
基 金：This work was supported by the State Key Laboratory of Soil sustainable Agriculture,Institute of Soil Sciences,Chinese Academy of Sciences(Grant No.5022505) the National Natural Science Foundation of China(Grant No.40771186)
主 题：^(137)Cs dating modified AHP method environment quality comprehensive evaluation heavy metal contamination of sediment Lake Dianchi
摘 要：Through the use of general sampling and measurement by ^(137)Cs dating,problems regarding the absence of monitoring data can easily be ***,weighted values need to be determined while Environment Quality Comprehensive Index(EQCI)is commonly used as applied in environmental quality comprehensive *** order to overcome the subjectivity in determining weights,the modified Analytical Hierarchy Process(AHP)method was *** modified AHP method involved the following key procedures:First,the parameters y_(i1) and y_(i2) were calculated based on the monitoring data;second,the factors were put in order according to the symbol and value of y_(i1) and y_(i2);third,the continuous odd integers,which represented the importance of factors,were given to factors according to their seating order;and,fourth,the factor weights were determined from the pair-wise comparison matrix calculated by the ratio of the given odd ***,the weights were completely based on the monitoring *** the present study,the comprehensive quality of sediments in five sections of Lake Dianchi were evaluated and the results indicated that the current contamination of sediments in each lake section is much more serious than at any other time in history.
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