Gce Model Questions Vol1 2018 Geography Question 8
Practice objective / multiple choice question 8 from the 2018 Gce Model Questions Vol1 Geography examination.
A homogeneous soil layer 1.5 m thick drains vertically under gravity with a unit hydraulic gradient. The upper 0.5 m of the layer has hydraulic conductivity \(K_1 = 1.2\times10^{-5}\,\text{m\,s}^{-1}\); the lower 1.0 m has conductivity \(K_2 = 0.8\times10^{-5}\,\text{m\,s}^{-1}\). The initial volumetric water content is the saturation value \(\theta_s = 0.45\) and the desired final water content is the field‑capacity value \(\theta_{fc}=0.25\). Assuming drainage proceeds uniformly, estimate the time required (in hours) for the water content to fall from saturation to field capacity.
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About This Question
This is Gce Model Questions Vol1 2018 Geography Question 8. It is one of the objective questions from the 2018 Gce Model Questions Vol1 Geography examination.
Difficulty level: Medium .
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