Problem $5.$ Flownets

The figure below shows the flow net for steady$-$state seepage conditions under a dam $($profile view$).$ The head drop between equipotentials is constant.

a$)$ In the figure above, indicate which boundaries are no flow $($label with NFB$)$ and which are constant head $($label with CHB$).(4$ points$)$

b$)$ In the figure above, indicate the lines that are flow lines $($label with FL$)$ and which are equipotential lines $($label with EQ$).(4$ points$)$

c$)$ In the figure above, indicate the locations within the aquifer where the velocity is the highest with the label with HV$.(4$ points$)$

d$)$ Does the soil under the dam appear to be isotropic? Justify your answer. $(4$ points$)$

e$)$ Estimate the volume of water passing under the dam $(m\frac{3}{m}in$ per $m$ width$).$ Regardless of your answer to d$,$ assume the soil is homogeneous and isotropic. You may assume the partial flow tube at the bottom acts as a full flow tube. $(4$ points$)$

f$)$ Estimate the time $($days$)$ it takes a parcel of water to travel from A to B$.$ Recall that $t=$ points