Some hydraulic properties of Sandy-silty Norweigan Tills

S. HALDORSEN, P. DEINBOLL JENSSEN, J. Chr. KOLER, E. MYHR

Abstract


Norwegian tills are usually coarse. The saturated water movement is mainly concentrated along fractures, fissures and' sorted sediment zones. The studies indicate that les that 10% of the water drains through the pore system of the tillmatrix. There is no marked correlation between the grain-size composition of the till and the saturated permeability. Homogeneous Norwegian tills may form important conduits of capillary water transport from the groundwater level to the vegetation during dry summers. This is mainly because the tills are dominated by equidimensional minerals which form an open pore system and because the groundwater level in many cases is situated at shallow depths.

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