Sketch a flow net for the boat lock system constructed from sheet piles shown on the next page. Note that the problem is symmetrical such that you need only complete the flow net on either the left or right side of the problem. Dimensions are in meters.
The total height of the soil layer is 10m, the sheet piles are 8m long, and the lock is 6m deep and 7m wide. The water is 2m deep inside the lock, and the water table is at the ground surface outside the lock. Use the flow net to compute the seepage rate. Note that the seepage rate will be in units of m'/day/m since you are solving a two-dimensional problem (i.e., units are flow rate per unit meter into and out of the plane of the problem). The hydraulic conductivity of the
soil is k = 107 m/s.