Health risk assessment of water environment in drinking groundwater well fields based on triangular fuzzy number theory
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Abstract:
In order to better determine the potential impacts of water contaminants on public health, a fuzzy model based on triangular fuzzy number theory was developed to evaluate the human health risk of drinking groundwater well fields in Shizuishan city in this paper, and then the effects of uncertainties on health risks were analyzed. The results showed that the health risk is not sensitive to the parameter-value-related uncertainty. The pollutant-concentration-related uncertainty plays an important role in the assessment. If the changes in concentration are not taken into account, the calculated risks will be smaller. By using the above model, we obtained the health risks of carcinogens and non-carcinogens in the drinking water well fields of Shizuishan. The chemical carcinogenic risks are much larger than the noncarcinogenic risks, which are all close to the permissible level of 1.0×10-4 a-1. Cr should be the priority concern in the water resource management due to the high carcinogenic risk. The human health risks of the water environment are ranked as follows: NO. 2 well field> NO. 5 well field >NO. 4 well field >NO. 1 well field.
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