A water table pond is dug in a material that saturated with water.
and will not hold water when the water table lowers. Most of the time the water does not come all the way to the surface but not always. Sandy, pours material, flat ground.
Spring may be on the side of a hill and will come to the surface. The water moves underground and then may runs on the surface, The amount of water will very just like the water table depending on the conditions,
