Question $3(20$ marks$)$:

Figure $2$ shows the cross$-$section of an earth dam $($compacted clay with saturated hydraulic conductivity of ${0\mathrm{.}0001}^{k}c\frac{m}{s})$ and reservoir system resting on a $10$ m thick layer of loam soil with saturated hydraulic conductivity of $0\mathrm{.}01c\frac{m}{s}$ underlain by impermeable shale rock. The crest of the dam is $50$ m long $($perpendicular to the picture$).$ Can it be done by the flow net method? Why the answers are different than the Darcy's law?

a$)(10$ marks