The relative importance of each pollution factor in analytical hierarchy process (AHP) method comes from pooling expert opinions in general. Because expert opinions are based on information and judgment criteria, dete...The relative importance of each pollution factor in analytical hierarchy process (AHP) method comes from pooling expert opinions in general. Because expert opinions are based on information and judgment criteria, determining their weight may lead to uncertainty.. Therefore, an improved AHP method had been developed. The process of the improved AHP method involved four key procedures. The weights of pollution factors were completely related to the objective monitoring data through the standardization of these procedures. The environmental comprehensive quality of water and sediment of Xuanwu Lake, Nanjing, China had been evaluated. The environmental quality comprehensive indices (EQCI) of the water in 1991-1995 and 1996-2000 were 3.32 and 1.85, respectively, indicating that the water quality improved. The EQCI of the sediment in 1995 and 2000 indicates that the sediment contamination decreased from 1995 to 2000. Such results agreed with the fact that the lake had been under comprehensive control. However, with the classical AHP method, the EQCI of the sediment in the northwestern part of the lake may have indicated that sediment contamination increased from 1995 to 2000. The discrepancy may have resulted from the judgment difference of the experts. The improved AHP method can avoid arbitrariness of subjective judgment and can reflect the real influential factors of environment pollution in different periods or regions.展开更多
使用Ecopath with Ecosim(EwE)构建了玄武湖生态系统模型,探究了玄武湖生态系统特征并针对富营养化问题进行了生物操纵模拟。结果表明:玄武湖食物网结构简单,连接指数(CI)、系统杂食性指数(SOI)、总初级生产量/总呼吸量(TPP/TR)、Finn’...使用Ecopath with Ecosim(EwE)构建了玄武湖生态系统模型,探究了玄武湖生态系统特征并针对富营养化问题进行了生物操纵模拟。结果表明:玄武湖食物网结构简单,连接指数(CI)、系统杂食性指数(SOI)、总初级生产量/总呼吸量(TPP/TR)、Finn’s循环指数(FCI)和Finn’s循环平均能流路径长度(FCL)均表明玄武湖生态系统正处于发育阶段;对鲢、鳙、枝角类及桡足类进行了生物操纵模拟,在生物操纵期间蓝藻、绿藻、硅藻相对于操纵前生物量削减百分比分别达到18%、5%、4%,表明生物操纵对富营养化有一定的控制效果。展开更多
基金National Natural Science Foundation of China, No.40771186.
文摘The relative importance of each pollution factor in analytical hierarchy process (AHP) method comes from pooling expert opinions in general. Because expert opinions are based on information and judgment criteria, determining their weight may lead to uncertainty.. Therefore, an improved AHP method had been developed. The process of the improved AHP method involved four key procedures. The weights of pollution factors were completely related to the objective monitoring data through the standardization of these procedures. The environmental comprehensive quality of water and sediment of Xuanwu Lake, Nanjing, China had been evaluated. The environmental quality comprehensive indices (EQCI) of the water in 1991-1995 and 1996-2000 were 3.32 and 1.85, respectively, indicating that the water quality improved. The EQCI of the sediment in 1995 and 2000 indicates that the sediment contamination decreased from 1995 to 2000. Such results agreed with the fact that the lake had been under comprehensive control. However, with the classical AHP method, the EQCI of the sediment in the northwestern part of the lake may have indicated that sediment contamination increased from 1995 to 2000. The discrepancy may have resulted from the judgment difference of the experts. The improved AHP method can avoid arbitrariness of subjective judgment and can reflect the real influential factors of environment pollution in different periods or regions.
文摘使用Ecopath with Ecosim(EwE)构建了玄武湖生态系统模型,探究了玄武湖生态系统特征并针对富营养化问题进行了生物操纵模拟。结果表明:玄武湖食物网结构简单,连接指数(CI)、系统杂食性指数(SOI)、总初级生产量/总呼吸量(TPP/TR)、Finn’s循环指数(FCI)和Finn’s循环平均能流路径长度(FCL)均表明玄武湖生态系统正处于发育阶段;对鲢、鳙、枝角类及桡足类进行了生物操纵模拟,在生物操纵期间蓝藻、绿藻、硅藻相对于操纵前生物量削减百分比分别达到18%、5%、4%,表明生物操纵对富营养化有一定的控制效果。
