| Budget Amount *help |
¥3,380,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥780,000)
Fiscal Year 2010: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2009: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
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| Research Abstract |
The migration of Light Non-Aqueous Phase Liquid (LNAPL) in dry/wet sandy soils was visualized by the model tests in plane strain condition and using X-ray Computed Tomography (CT) method. To evaluate the saturation degree of water or LNAPL in the sandy soil, new method to decide the threshold value in X-ray CT image was proposed in this paper. It was concluded that saturation degree and grain property of sandy soil changed the migration mechanism of LNAPL, and the distribution form of liquids differed by S-p relation of liquids. Sandy soil layer with saturation degree at least more than 20% inhibited the vertical infiltration of LNAPL. More amount of water than LNAPL was retained in near-surface. LNAPL permeation developed around injection point in well graded materials.
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