[Change of groundwater potential in the artesian aquifer of the metro area, 1881-1997@ Endo and al., 2001.
*(1)-(3) indicate major groundwater restriction.]
[Land subsidence, 1938-1974 @ Endo and al., 2001.]
[Diagram of groundwater and engineering work in the underground station of Tokyo @ Kurasawa, 2001]
[Effective utilization of leakage of Kokubunji Tunnel @ Simizu, 2004]

 

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