You still need several ...
Published by Muhammad Alfalah Fauzi, CFD Engineer Intern at Institut für Wasserbau und Technische Hydromechanik (IWD) - TU Dresden
You still need several pumping stages and energy source for pumping. So my suggestion is look for alternative energy such as wind or solar. I assume hydroelectric energy is not feasible in your area.
Related to shadow zone, first you need to make a further feasibilty study to justify whether the area is applicable for solar power or not since nowadays there are many method for optimizing solar power.
One more thing, you also need to measure the height for elevated water tank if you want to distribute by gravity to reduce electricity usage.
Hope this helps.