Hi PF! I have a question regarding the use of centrifugal pumps. I have a system with a constant flowrate of water at 2m^3/s pumping water from a lower to a higher reservoir. The inlet condition is a head of 10m. The Height of the upper reservoir will vary from 83m in the beginning to 287m at the end. My questions are: Should I use more than one pump? If so Any litterature that covers the need of multiple pumps? (My fluid mechanics books don't) And how does the varying head effect efficiency of the pump/pumps?