Table 3 Hydraulic conductivity of different types of sediments34.

From: Evaluation of groundwater resources in Wadi Qena, Egypt: a geophysical and hydrogeochemical perspective

Type of material

Hydraulic conductivity (m/day)

Clay

10–7 to 10–5

Silt

0.1

Fine sand

0.1 to 1

Coarse sand

1 to 100

Gravel

100 to 1000 (or more)

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