8- Consider a vertical column that is packed in two horizontal layers. The upper layer has a thickness of Li and the lower has a thickness of 2Li. The upper

layer has a hydraulic conductivity of K1. The lower layer has a hydraulic conductivity equal to 0.5Kj. The column is undergoing steady state downward flow. The flux through the column is equal to K1. What are the hydraulic head gradients in the upper and lower layers?