$8\mathrm{.}2$ Draw a flow net for the single row of sheet piles driven into a permeable layer

as shown in Figure $8\mathrm{.}23.$ Given:

$H_1=3m$

$D=1\mathrm{.}5m$

$H_2=0\mathrm{.}5m$

$D_1=3\mathrm{.}75m$

Calculate the seepage loss per meter length of the sheet pile $($at right angles

to the cross section shown$).$