[Ecological risk assessment of sediment pollution based on triangular fuzzy number].
Based on the characteristics of random and fuzziness, and the shortage and imprecision of datum information of water environmental system, environment background value of sediments and concentration of pollution is calculated by means of triangle fuzzy number and fuzzy risk assessment model of the potential ecological risk index is established. Using this method heavy metal pollution and ecological risk in the Yangtze Estuary and its adjacent waters were analyzed. The result shows that the environment of the foundation of the study area is subject to varying degrees of pollution. The pollution extents are correspondingly Cu, Hg, Zn, Pb, As, Cd. RI by that method and the Hakanson ecological risk method is in similar trend. RI of the estuary, turbidity maximum zone and Hangzhou bay is greater than that at outside of the estuary and sea area nearby Zhousan, and the potential ecological risk rate increases one. The assessment result is good in the validation based on the corresponding period macrobenthic community parameters.
Zhou
Xiao-Wei
XW
Research Institute of Water Resources and Hydro-Electric Engineering, School of Renewable Energy, North China Electric Power University, Beijing 102206, China. zxw@ncepu.edu.cn
Wang
Li-Ping
LP
Zheng
Bing-Hui
BH
D002681:China; D017753:Ecosystem; D004784:Environmental Monitoring; D017143:Fuzzy Logic; D019015:Geologic Sediments / Q000032:analysis*; D019216:Metals, Heavy / Q000032:analysis*; D009792:Oceans and Seas; D018570:Risk Assessment; D045483:Rivers; D014874:Water Pollutants, Chemical / Q000032:analysis*
D019216:Metals, Heavy; D014874:Water Pollutants, Chemical