Question

A water network is forned of five pipas, one treated water reservoir and one pump. The demands at junction nodes # 3, 4 and 5 are: d3 - 3 MGD, 1 MGD and ds - 2 MGD. The water surface elevation in the reservoir is at 15 feet from the datum. SCADA data offers an incomplete set of flow values and hydraulic grade lines (HGL), as shown on the schematic diagram below. The flow in pipe B is: Q. - 4 MGD. The HGL at the junctions are: HGL, 100 feet, HGL = 80 ft, HGL - 90 ft and HGL, -80 ft. nocle 10 > 0,3 MGA EL PIPE F Zeis PIPE A Mods PIPE E 5HGL = 80 Pite DATUM 45= 2 MGA PUMP Q=4760 PIPE G noleg 4 HGL =90 ,= MGD

QA=2MGD, QE=1MGD, QF=0MGD, QG=2MGD, QPump=6MGD, Energy gradeline at node 1 (EGL1)=15. Diameter of the short pieces of pipe upstream and downstream of the pump is 24 inches.

What is the hydraulic grade line at node 1 (HGL1)?

Answer 1

Ang HGC = 1 + 2 Since for Romt 1 zzo 2- Datum head I bressore = 15 in, HGL at Roint 1 = 15 inches,