6 From the pipe network data below determine the flow in pip

6. From the pipe network data below, determine the flow in pipes C head H. Also determine the pressure (in psi) at E if the ground elevation is 650 ft. E and DE, and the pressure (f3/sec) 15.35 5.76 BC BD 9.55 DC 2.29 CE DE (ft) 1000 1500 1200 1500 2000 1000 12 12 12 0.424 1.510 1.100 9.530 1.540 0.949 HA 1000 f QE

Solution

Answer:

To Calculate Discharge, Q as per Darcy-Weisbach equation,

h_f = fLV² / 2gD

     = fLQ² / 12.1D⁵

then, Q =(h_f^*12.1*D⁵/f*L)^1/2

therefore, for length CE, Q_E = (650x12.1*1⁵)/2000)

                                         = 3.93 cubic foot.

               for length DE, Q_E = (650x12.1*0.67⁵)/1000)

                                         = 1.06 cubic foot.

As given in the question itself the ground elevaiton at E is 650 ft, then H_E = 650 ft.