Centrifuge Modeling of LNAPL Transportation in Sand Deposit by Groundwater Flow

摘要

Centrifuge model tests were carried out to observe LNAPL transportation in a sand deposit. The LNAPL infiltrated into the partly saturated sand deposit and was transported along the surface of the groundwater table by an induced horizontal flow. A floating type impermeable sheet was inserted in an attempt to stop the transportation of LNAPL. It appeared that the sheet was unable to stop the transportation of LNAPL. However, the sheet wall caused the LNAPL to accumulate at a certain location. It was investigated whether the accumulation might facilitate efficient extraction of the LNAPL from the sand deposit.