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  1. The vertical hydraulic conductivity of the top soil at certain is 0.2 cm/h. A storm of intensity 0.5 cm/ hr occurs over the soil for an indefinite period. Assuming the surface drainage to be adequate, the infiltration rate after the storm has lasted for a very long time, shall be
    1. smaller than 0.2 cm/hr
    2. 0.2 cm/ hr
    3. between 0.2 and 0.5 cm/hr
    4. 0.5 cm/hr
Correct Option: B

Hydraulic conductivity, ƒc = 0.2 cm/h
Storm intensity, i = 0.5 cm/h
Infiltration rate = ƒa
If i > ƒc ⇒ ƒa = ƒc
i > ƒc ⇒ ƒa = ƒi
Here i > ƒc
∴ ƒa = ƒc = 0.2 cm/h



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