Problem 11 The figure below shows three layers of soil in a tube that has a 100mmx100mm cross section (square cross-section). Water is supplied such that a constant head difference of 300 mm is maintained across the soil layers. The hydraulic conductivities of the soils in the direction of flow are given. Calculate the flow rate in cm3/hr. Water supply Soil A B C k (cm/sec) 10-2 3x10-3 4.9x10-4 Constant-head difference = 300 mm - ... . .. . + 150 mm *** 150 mm + 150 mm