Fig.8-11 Depth distributions of groundwater pressure and chemistry measured in boreholes
(a) The change of freshwater head with depth in the deep domain of the Wakkanai Formation indicates low permeability.
(b) In the deep domain, fossil seawater also remains, although the surface water admixes near the boundary with the shallow domain. The boundary is denoted as 0 m in depth.
(b) In the deep domain, fossil seawater also remains, although the surface water admixes near the boundary with the shallow domain. The boundary is denoted as 0 m in depth.
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