| 摘要 |
PROBLEM TO BE SOLVED: To provide a cleaning method of a coast area by which diffusion of pollutants such as oils and organic solvents in seawater and river water can reliably be prevented without risk of subsiding ground by pumping up groundwater. SOLUTION: The cleaning method is for purifying polluted soil/groundwater by installing a water injection groove 1 in the periphery of a coastal protection bank 12; increasing the water level S in the groundwater near the coastal protection bank 12 and generating reverse flow of the groundwater near the water injection groove 1 by injecting the seawater pumped up from the sea 11 to the water injection groove 1; installing a plurality of recovery wells 4 near the boundary of free water surface level of groundwater current and a separate flow line Z formed by water injection at the lowest groundwater level S; and recovering oil components P collected in the surface of groundwater through the recovery wells 4 by an oil recovery apparatus 6. COPYRIGHT: (C)2004,JPO
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