This work focuses on the development of a fuzzy random health risk model. The concept of fuzzy random variable is used to develop this health risk model. Health risk is addressed as the risk due to exposure to uranium through ingestion of food grown in and around a high background area which is rich in groundwater and has a substantial amount of phosphate deposits that constitute uranium. Lack of data about the activity concentration of uranium and its variability at many locations of that area justifies its fuzziness and randomness. A similar reason is valid for the consumption of food from the area. Therefore, these input parameters of the exposure model are the fuzzy random variable. Exposure model computes the daily average ingestion and risk is computed by multiplying this with the corresponding cancer slope factor. Fuzziness of daily average ingestion is computed at a specified percentile of the lower and upper fuzzy cumulative distribution of daily average ingestion. Randomness is computed at every alpha cut of the fuzzy random daily average ingestion. Fuzzy random daily average ingestion is used to compute the fuzzy random risk. It has been shown that risk due to the consumption of naturally occurred uranium through ingestion of food is insignificant. Support, uncertainty index, possibility, necessity, and credibility of the fuzzy random risk are also computed to explore the role of fuzzy random variable in uncertainty of risk estimation.
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- Development of a Fuzzy Random Health Risk Model
H. S. Kushwaha
- Springer India
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