Uncertainty Evaluation of the Surface Water’sHeavy Metal Health Risk in Baiyun Mountain
Received date: 2013-05-22
Revised date: 2013-07-26
Online published: 2013-09-10
The water environmental health risk assessment relates environmental pollution with human health, taking its risk degree as evaluation index, quantitatively describing the risk that pollution does great harm to human body. To understand the surface water’s heavy metal health risk in Guangzhou Baiyun Mountain, this study measured the nine sampling points in Baiyun Mountain’s south mountain and north mountain, including these physical and chemical indicators, such as water temperature, pH value, Cd, As, Cr, Hg, Pb, Mn, Cu,Zn and Ni, constructing the uncertainty evaluation model of the surface water’s heavy metal health risk in Baiyun Mountain(heavy metal including radioactive substances, chemical carcinogens and body toxic substances, etc.), having a fuzzy classification of the health risk assessment standard of the surface water’s heavy metal, further determining the membership degree and the belonging of the risk grade. By comparing the evaluation results of the uncertainty model and the deterministic model, the study found that: the surface water’s heavy metal health risk level was higher in Guangzhou Baiyun Mountain in 2012, being of the high grade and above, even achieving the highest grade; the surface water’s heavy metal health risk level of the north mountain was higher than the south mountain; the uncertainty evaluation model of the surface water’s heavy metal health risk was more reasonable and comprehensive to reflect the real situation of the surface water’s heavy metal quality concentration than the deterministic model. Besides, in the relevant references these questions on the total score of the health risk of the uncertainty evaluation model, the membership degree formula of the risk grade, etc. need further discussion.
Song Yan , Xu Songjun , Zhang Yong , Liao Xiuying , Zhang Linying , Yang Xiu , Yang Wenhuai , Feng Xiaodan . Uncertainty Evaluation of the Surface Water’sHeavy Metal Health Risk in Baiyun Mountain[J]. Advances in Earth Science, 2013 , 28(9) : 1036 -1042 . DOI: 10.11867/j.issn.1001-8166.2013.09.1036
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