draw the flow net for both the figures.

$12.$ If the static water level in the reservoir is $22$m and $9$m in the stream, calculate the contour interval and label the equipotential lines

$13.$ Calculate the total Q $($QT$)$ in m$3/$day through the flow net if the dam is $11$m long and the hydraulic conductivity of the aquifer is $2$ x $10-4$ m$/$s$.$

Figure $2$

Figure $1$