TY - GEN
T1 - Proposed geophysical method for investigating the for a landfill project in Okayama, Japan
AU - Nishigaki, Makoto
AU - Komatsu, Mitsuru
AU - Inoue, Makoto
AU - Kankam-Yeboad, Kwabena
AU - Mattersteig, Stephan
AU - Akudago, John Apambilla
PY - 2006/12/1
Y1 - 2006/12/1
N2 - In Japan, wastes are dumped in mountainous areas due to the unavailability of land. The sea, thus, offers a good potential as landfill sites. The seabed along part of the coast of Okayama was first investigated by means of drilled boreholes. Information from the borehole togs showed variable clay depths of 1-3 m. In order to determine the continuity of the clay layer, an Induced Polarisation (IP) resistivity survey was carried out in the sea. The geophysical measurements showed that there is a continuous clay layer in the seabed; with a thickness of not less than 1 m. Further tests showed that the clay layer has a permeability of 1.0E-06 cm/s which meets the requirement of continuous clay liners of at least 5 m thick and permeability, k<1.0E-05 cm/s for landfill sites in Japan. Therefore, the clay layer in the sea bed along the coast of Okayama could serve as an effective liner and (lie site is suitable for a landfill, without any threat to the sea. The applicability of the method in underwater geotechnical investigations is discussed in this paper.
AB - In Japan, wastes are dumped in mountainous areas due to the unavailability of land. The sea, thus, offers a good potential as landfill sites. The seabed along part of the coast of Okayama was first investigated by means of drilled boreholes. Information from the borehole togs showed variable clay depths of 1-3 m. In order to determine the continuity of the clay layer, an Induced Polarisation (IP) resistivity survey was carried out in the sea. The geophysical measurements showed that there is a continuous clay layer in the seabed; with a thickness of not less than 1 m. Further tests showed that the clay layer has a permeability of 1.0E-06 cm/s which meets the requirement of continuous clay liners of at least 5 m thick and permeability, k<1.0E-05 cm/s for landfill sites in Japan. Therefore, the clay layer in the sea bed along the coast of Okayama could serve as an effective liner and (lie site is suitable for a landfill, without any threat to the sea. The applicability of the method in underwater geotechnical investigations is discussed in this paper.
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M3 - Conference contribution
AN - SCOPUS:34249078233
SN - 0727734741
SN - 9780727734747
T3 - 5th ICEG Environmental Geotechnics: Opportunities, Challenges and Responsibilities for Environmental Geotechnics - Proceedings of the ISSMGE 5th Int. Congress
SP - 1495
EP - 1502
BT - 5th ICEG Environmental Geotechnics
T2 - 5th ICEG Environmental Geotechnics: Opportunities, Challenges and Responsibilities for Environmental Geotechnics - International Society of Soil Mechanics and Geotechnical Engineering's (ISSMGE) 5th International Congress
Y2 - 26 June 2006 through 30 June 2006
ER -
