Question

(a) For a sandy loam soil, using Green-Ampt equation to calculate the infiltration rate (cm/h) and cumulative infiltration depth (cm) after 1, 60, and 150 min if the effective saturation is 40 percent. Assume a continuously ponded condition.

(b) Take the infiltration rates computed in Part (a) at 1 min and 150 min as the initial and ultimate infiltration rates in Horton's equation, respectively. Determine the decay constant, k.

(c) Use the decay constant, k, found in Part (b) to compute the cumulative infiltration at t = 60 min by Horton's equation.

Answer 1