Question

An elevated water reservoir (water level at 210 m) is to supply a lower groundwater reservoir (water level at 138 m). The reservoirs are connected by 800 m of 400 mm ductile cast pipe (C = 100) and 1200 m of 300 mm ductile cast-iron pipe (C = 100) in series.
(a) What will be the discharge delivered from the upper reservoir to the lower one?
(b) If the water demand increases by 50% in the future, determine the required size of pipe that has to be installed in parallel with the existing piping.

Answer 1