Steady water surface profile of gradually varied flow can be calculated using either a steady flow approach or an unsteady flow approach.
使用计算机计算明渠恒定渐变流水面曲线有两种分法：恒定流方法和非恒定流方法。
The factors affecting the water-surface profile and channel storage curve may be summarized as the physical geographical condition and the flow regime of the river reach.
影响水面线及槽蓄曲线的因素可概括为河段自然地理状况及水流情势。
The experiment studied the effects of residue used as surface mulch, mix with soil and a separate horizon in soil profile on soil water and salt movement.
本试验主要研究了作物秸杆表面覆盖、垂直覆盖（混施）和隔层对土壤水盐运动的影响。
Most of the traditional methods used to determinate the free surface profile are based on modifying or changing the grid system to adapt the changing water surface during the iteration process.
提出了自由面适应网格方法，该方法与传统方法相反，即在迭代求解过程中不改变网格而是让浸润线不断地去适应网格，采用网格映射的方法去确定浸润线，直至最后达到允许精度，得到要求的浸润线分布。
Most of the traditional methods used to determinate the free surface profile are based on modifying or changing the grid system to adapt the changing water surface during the iteration process.
提出了自由面适应网格方法，该方法与传统方法相反，即在迭代求解过程中不改变网格而是让浸润线不断地去适应网格，采用网格映射的方法去确定浸润线，直至最后达到允许精度，得到要求的浸润线分布。
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