GATE 2018 Civil Engineering Q24

Question

The infiltration capacity of a soil follows the Horton's exponential model. $f = c_1 + c_2e^{-kt}$. During an experiment, the initial infiltration capacity was observed to be 200 mm/h. After a long time, the infiltration capacity was reduced to 25 mm/h. If the infiltration capacity after 1 hour was 90 mm/h, the value of the decay rate constant, $k$ (in $h^{-1}$, up to two decimal places) is _________

Accepted Answer

0.70 to 0.70