(Solved): The flow net below is a cross section through an excavation held open by a sheet pile walls. The s ...

The flow net below is a cross section through an excavation held open by a sheet pile walls. The subsurface is composed of isotropic fine sand with $$\mathrm{K}=1\mathrm{m}/\mathrm{d}$$ except for a $$1?\mathrm{m}$$ thick layer of distinct material between $$5.4\mathrm{m}$$ and $$4.4\mathrm{m}$$ depth on the left of the excavation. A few equipotentials (in $$\mathrm{m}$$ ) are labeled on the figure. Assume a scale of $$1\mathrm{cm}=1\mathrm{m}$$ and a porosity of $$\mathrm{n}=0.3$$ everywhere. 3) 1 point. What is the magnitude of the specific discharge at point $$A$$ ? $$q_{\mathbf{A}}=$$ in $$\mathrm{m}/{\mathrm{d}}_{?}$$ 4) 1 point. What is the hydraulic head measured by piezometer $$\mathrm{B}$$ ? $${\mathbf{h}}_{\mathbf{B}}=$$ in $$\mathrm{m}$$ 5) 1 point. Indicate the water level in piezometer $$\mathrm{B}$$ on the flow net. 6) 1 point. If the excavation is $$5\mathrm{m}$$ long (into the page), at what rate does water enter the excavation from the right side? Rate of inflow from right $$=$$ in $$\mathrm{m}3/\mathrm{d}$$ 7) 1 point. If the excavation is $$5\mathrm{m}$$ long (into the page), at what rate does water enter the excavation from the left side? Rate of inflow from left = in $$\mathrm{m}3/\mathrm{d}$$ 8) 3 points. How much time is required for water to travel from the surface to point $$\mathrm{C}$$ ? Time $$=$$ in days 9) 3 points. What is the value of the hydraulic conductivity in the 1-m thick layer of distinct material between $$5.4\mathrm{m}$$ and $$4.4\mathrm{m}$$ on the left of the excavation? $$\mathbf{K}=$$ in $$\mathrm{m}/\mathrm{d}$$