.8 In the water supply system shown in Fig. 5.19, water ows by gravity from reservoir A to points C and D as well as > reservoir E. The elevations of known points are as follows: Water level A = 650.00 m Elevation B = 590.00 m Elevation C = 550.00 m Elevation D = 570.00 m The measured residual pressures are as follows: Point B=300 kPa Point C500 kPa The known flows are as follows: Pipe BD 30 L/s Pipe BE = 75 L/s C for all pipes = 100. (a) Calculate the flow in line BC. (b) Find the residual pressure at point D. (c) Compute the maximum water level in reservoir E. (d) Determine the required diameter for pipe AB. Figure 5.19 Water System for Problem 5.8. Water A reservoir B dAB L = 10,000 m d = 300 mm L = 3,640 m -D d = 300 mm L = 2,500 m d=400 mm L= 11,760 E Water reservoir