Which of the following statements about groundwater are TRUE? Select ALL that apply. (Hint: 4 of the 6 statements are correct!) The water table generally maintains a relatively flat shape beneath the ground surface. Owing to pressure differences, it is possible for groundwater to flow uphill. The water table will be deeper below the surface in arid regions as compared to humid regions. A confined aquifer is an underground source of water that is prevented from reaching Earth's surface by an impermeable layer. The surface of the water table may be visible above ground as the surface of a river or lake. If an aquifer has a high porosity, then it will also have a high permeability