Problem $2$: Given the flow net below with hydraulic conductivity $k=3\mathrm{.}5{10}^{-6}\frac{m}{sec},$ determine:

a$.$ The hydraulic gradient in the square element marked with an $"$ X $"$ if the average length of flow between C and D is $5$ meters.

b$.$ The quantity of seepage beneath the sheet$-$pile cofferdam per meter of dam $($into the page$)$ per day.

c$.$ The pressure head $(h_p)$ at the points marked $"$E$"$ and $"$F$".$ Point $F$ is $5$ meters below the ground surface.

d$.$ The pore pressure $($u$)$ at the point marked $"$G$".$

$49$