n. hypsography
misc. topographic relief
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。
Because the surface of the water table is not flat but instead rises and falls with topography, groundwater is affected by gravity in the same fashion as surface water.
现在的地形起伏超过1000是削蚀作用造成的。
The present relief of more than 1000 ft was due to excavation.
景观团队利用场地的自然地形起伏，创造出一条错落有致的石头河道。
Leveraging the site's topographic relief, stone outcroppings define a dramatic watercourse.
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