The water table is notflat but usually follows the contours of the topography.
地下水位是不平坦的，而是通常随地势而变化。
2
Because the surface of the water table is notflat but instead rises and falls with topography, groundwater is affected by gravity in the same fashion as surface water.
由于地下水位不是平面的，而是随着地形起伏的，所以地下水和地表水一样受到重力的影响。
3
Shade and bad weather like snow don't hurt it because the panels are notflat.