1. The working lift of the pump is required to determine the total lift of the pump, and the flow of the pump is not allowed to exceed the outflow of the well.
2, the location of the borehole layout should be reasonably determined according to the local actual hydrogeological conditions.
3. There are two construction methods for large-mouth wells, one is large slotting method, manual excavation or blasting construction, and the other is open caisson method, drainage construction or undrained construction.