In-situ measurement and evaluation of hydraulic conductivity of sand sediment soil mixed with gravel
2001
Morii, T. (Niigata Univ. (Japan)) | Mori, T. | Matsumoto, S.
Permeability of sand sediment soil was measured by using in-situ infiltration test to predict amount of runoff from the soil subject to heavy rainfall. The debris flow had sedimented onto river bed to form the soil between narrow valley. The soil was sand mixed with small to large gravel. A Guelph pressure infiltrometer (GPI) was employed to measure field-saturated hydraulic conductivity of the soil. The GPI method was effectively applied to measure the hydraulic conductivity of the soil quickly and easily. A physical model to determine of hydraulic conductivity of soil taken account of gravel content was proposed. Effect of gravel content on the runoff amount from the soil was examined by using saturated-unsaturated seepage analysis.
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