Question $2$

$10$ Marks

Based on the configuration shown below, calculate the pore$-$water pressure $u_w$ at Point $A($i$.$e$.,$ at the interface between Soil $1$ and Soil $2).$ Note that the hydraulic conductivity for Soil $1$ and Soil $2$ is $k_1=0\mathrm{.}002\frac{m}{s}$ and $k_2=0\mathrm{.}004\frac{m}{s}.$ Note: If required, you may assume the unit weight of water as $10k\frac{N}{m^3}.$