Horizontal saturated conductivity1 and specific yield2 of geologic materials. Sources:Duffield; Morris and Johnson
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Material Range Ksat (m/s)3 Typical Ksat (m/s) Range specific yield Typical specific yield
Gravel 3×10-4 to 3×10-2 3×10-3 0.21-0.28 0.24

1vertical saturated conductivity is considered to be one-tenth the value of horizontal saturated conductivity.
Superscript textSpecific yield is expressed here as a fraction. It is often reported as a percentage in the literature.
31 meter = 3.28 feet