In many water supply systems pumps form the "driving force". Seeing that water flows only downwards by natural means, it often has to be pumped or transported to higher positions.
Groundwater is transported almost exclusively via pumps. Pump systems require high amounts of energy. For this reason pumps have to be dimensioned painstakingly and designed optimally. This is the only method of ensuring that energy-efficient pump operation is possible.
Optimisation can be attained in many cases through electronic regulation.