7.5 A pervious soil layer is sandwiched between two impervious layers as shown in Figure 7.31. Find the rate of flow in m³/sec/m (at right angles to the cross section) through the pervious soil layer. Given: H = 3.5 m, H, = 1.75 m, h = 2.5 m, S = 28 m, a = 12°, and k = 0.055 cm/sec. Direction of flow Impervious layer Figure 7.31 Impervious layer S

A layered soil deposit is of dimension 3m x 2m x 3m. There are three different soils, each of 1 m thick as shown. The coefficient of permeability of these soil layered are shown in figure. The water is flowing in the z-direction under the head loss of 5.15 m. The quantity of flow (in m³/hr) would be 1m 1 m 1m 2m k₂ = 5 x 10 m/s k₂=2.5 x 10 m/s k₂ = 1.25 x 10³ m/s 3 m

a. For Figure 2 below, calculate the effective hydraulic conductivity for flow parallel and perpendicular to layering. Show your work. Explain the difference in values. Figure 2 sand layer; K = 1 m/d; thickness = 5 d 10.5 m clay layer; K = 0.000001 m/d; thickness = 0.5 m sand laver: K = 1 m/d; thickness = 5 m b. Figure 3 below shows the effects of groundwater refraction, assuming that groundwater flow in the top layer is almost horizontal i.e., a = 89.8°, what is B and what can you say about the flow in the clay layer? a a K, b B K Figure 3.