本文推导了二维非稳定流渗流场不同等级网格有限差分理论方法。
This paper gives the deduction of a theoretical method of the finite difference by different grades of grids, which is suitable for the seepage field of two-dimensional unsteady flow.
本文将土石堰过流场区分为一维恒定变量流场和二维恒定非达西渗流场；
The topping field of an earth-rock dam is divided into one-dimensional steady spatially varied flow field and two-dimensional Non-Darcy seepage flow field.
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