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Activity Number:
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244
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Type:
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Contributed
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Date/Time:
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Tuesday, August 8, 2006 : 8:30 AM to 10:20 AM
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Sponsor:
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Section on Risk Analysis
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| Abstract - #305969 |
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Title:
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General Indexes for Spatial-Temporal Population Risk Assessment
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Author(s):
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Chu-Chih Chen*+
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Companies:
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National Health Research Institutes
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Address:
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35 Keyan Road, Zhunan Town Miaoli County, 350, Taiwan
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Keywords:
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aggregate cumulative risk ; kriging ; lifetime cancer risk ; hazard index ; dioxin ; incinerator
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Abstract:
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We develop formulations for risk assessment of regional residential population exposed to a hazardous chemical (carcinogen or non-carcinogen) within a certain amount of time. Exposure assessment of unsampled area is predicted using kriging based on available sample measurements at different sites. Spatial-temporal aggregate cumulative risk is then obtained by integrating the risk function over population age distribution and exposure time interval, with average risk divided by area of the region and length of time. The formulation reduces to classical risk assessment indexes of lifetime cancer risk for carcinogens and hazard index (HI) for non-cancer toxic chemicals when spatial exposure and population is homogeneous. Example for risk assessment of residential dioxin exposure generated by incinerators in local area is illustrated.
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