Risk Management for Groundwater Contamination: Fuzzy Set Approach

by Istvan Bogardi, Univ of Nebraska-Lincoln, United States,
Andras Bardossy, Univ of Nebraska-Lincoln, United States,
Lucien Duckstein, Univ of Nebraska-Lincoln, United States,

Document Type: Proceeding Paper

Part of: Optimizing the Resources for Water Management


A methodology is developed for health risk management under uncertainty, using fuzzy sets. Groundwater nitrate contamination illustrates the methodology. A risk management framework is used, in which regulatory action should be taken above a 'de manifestis' risk line, no action taken under a 'de minimus' line, and action taken between the two lines if the cost is below $2 million per life saved. In cases when the 'pyramid' representing the joint membership function of individual risk (from the possibility tree analysis) and population risk falls on one of the lines, an appropriate technique is developed for regulatory decision-making.

Subject Headings: Groundwater pollution | Risk management | Fuzzy logic | Groundwater management | Health hazards | Water pollution | Uncertainty principles | Nitrates

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