🚰 Terraced Water Lift: Pump Curve, Valve Throttling and Reservoir Balance (2D)

Side view of a river pump that lifts water up three terraces to a hilltop reservoir that feeds a town. Set the static lift, the pump head and flow, the pump speed, the valve opening, the pipe diameter, the town demand and the reservoir area, and see where the pump curve meets the system curve, the flow, the power and the energy per cubic metre, where that energy goes, and how the reservoir level rises, falls or settles. The operating point, the energy split, the reservoir balance and the pump affinity laws are checked numerically, with four in-page numerical checks.