In the water supply system shown in Fig. Q4, the pumping station (P) delivers the water from the water treatment plant (WTP) to City ABCDE. The water head delivered by the pumps is 28 m. The water level in the pumping station wet well is at 600.00 m. The value of C for all pipes is l00.
The following elevations are known:
A 570.00 m
B 575.00 m
C 573.00 m
(a) Find the required diameter of the force main PA, (dPA), if the pressure at point A is not allowed to drop below 370 kPa.
(b) Determine the required diameter of pipe BC, (dBC), if the maximum allowed head loss in the network ABC is 0.003 m/m.
(c) Calculate the actual residual pressures at points A and C if dPA = 500 mm.