A method for estimating the source of chemical pollutants in soil gas by using results of the soil gas surveys

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  • HIBI Yoshihiko
    Department of Environmental Science and Technology, Faculty of Science and Technology, Meijo University

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  • 土壌ガス調査結果を用いた土壌汚染源の推定方法
  • ドジョウ ガス チョウサ ケッカ オ モチイタ ドジョウ オセン ゲン ノ スイテイ ホウホウ

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Abstract

This study evaluated the results of numerical simulations of the migration of chemical compounds in soil gas to develop a method for estimating the location and depth of a soil pollution source. It was found in this study that the relation between the variance or the average concentration of a chemical component and elapsed time approximated to a quadratic function and the quadratic equation could then be used to estimate the pollution source location with 2-4m errors. Moreover, because the first-degree term in the quadratic equation tended to increase with soil depth, it could be used to estimate the depth of the pollution source.

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