Looking into building a pump station in a floodplain - bad practice but is there any Methods used? already looked at providing bunds around the perimeter of the PS, and also raising the hieght of the slab, and manhole, and waterproofing the kiosk.
If you are using a wet well you can use submersible pumps, but you must make sure the wet well won't flood, as well as the control center, and stand-by power system. Don't forget to throw some freeboard on the maximum flood elevation.