OK. Since you are asking for basic information, have you ever designed a pump station? The manufacturers information is available on the web, just look for it.
I'd Search GlobalSpec for: axial flow and high lift centrifugal pups (pumps)
Once you get started, then ask questions.
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If the speed of light hasn't changed, why is it getting dark later?
Look at previous designs, and approach the makers of those installations' pumps directly.
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The elephant is a funny bird. It flits from bough to bough. It lays its eggs in a rhubarb tree and whistles, like a cow - Spike Milligan.
Pump Station Design
