Question#$2(30$ Marks$)$

$1-$ The cross section of a dam and the flow net are shown in Figure below.

a$)$ Estimate the hydraulic conductivity for the sand using Chapuis $(2004)$ empirical equation. Given: The void ratio of the sand is $0\mathrm{.}72$ and $D_{10}=0\mathrm{.}1mm$

b$)$ Estimate the flow rate per unit length.

c$)$ How high the water will rise if a piezometer is placed at point $P8$