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KMID : 1156220060320050506
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Journal of Environmental Health Sciences
2006 Volume.32 No. 5 p.506 ~ p.514
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Study about Prediction Model to Extremely Low Frequency Magnetic Fields for the Selected Primary Schoolchildren Nearby High Voltage Power Line
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Kim Yoon-Shin
Roh Young-Man
Hong Seung-Cheol
Choi Sung-Ho
Hyun Youn-Joo
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Abstract
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The objectives of this study were to evaluate personal exposure estimated using a time activity pattern and microenvironmental model. The study was carried out for 44 children attending a primary school nearby the lines (school A) and 125 children attending a school away from 154 ㎸ power lines (school B). For children attending school A, the estimated personal level was a little weak correlated with the measured level(Pearson r = 0.34~0.35). For children attending school B, the correlation was very low (Pearson r = 0.09~0.16) using the TWA Model Ⅱ, otherwise, TWA Model Ⅱ-1 which considered the average residential MF level according to the distance from the power line and home explained 39~53% of the correlation in MF personal exposures. The estimated personal exposure level was very well represented by the measured exposure level using TWA Model Ⅱ-2 which consisted on spot and 24 h stationary measurements at subject’s home (Pearson r = 0.65~0.85). In conclusion, personal magnetic field expsoure estimated using a TWA Model Ⅱ-2 should be provided for a reasonable estimate of measured exposure in schoolchildren living near the power line.
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KEYWORD
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extremely low frequency magnetic field, transmission power line, exposure assessment, microenvironmental model, residential exposure, personal exposure, spot measurements
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