砂中水力梯度一直增大，极大值产生在桶底接触砂面时。
Hydraulic gradient in sand increases constantly and the maximum is occurred when the bottom of bucket arrives to the sand surface.
流体向水力梯度下游的流动是从水力压头较高处到水力压头较低处。
Fluids flow down a hydraulic gradient, from points of higher to lower hydraulic head.
结合伯努里方程和临界牵引力理论，得到了基于临界速度的临界水力梯度公式；
Coupling the Bernoulli's equation and critical tractive stress theory, a critical hydraulic gradient model based on critical velocity is developed.
塌陷的扩大造成暗河通道的阻塞和改道，使得水力梯度变陡，溶蚀和侵蚀增强。
The collapse propagates itself by blocking and diverting the underground streams, so that hydraulic gradients become steeper and the solutional and erosional capacities are enhanced.
从水力条件出发，研究了应力状态对土体渗透侵蚀起动及破坏水力梯度的影响。
From the hydraulic point of view, the influence of complex stress states on the initiation and development of seepage erosion is investigated.
试验研究宽裂隙高水力梯度下的非达西渗流运动规律，建立流速与水力梯度的非线性关系曲线。
Circle water flow system and high hydraulic gradient are applied. The experiment is carried out and the behavior of non-Darcy water flow with high velocity is studied.
应用该模型可计算出二维裂隙网络中任意交点（内结点）的水头、等效水力隙宽、渗透系数、水力梯度等参数。
With the model, many parameters can be obtained such as water head, equivalent mechanical fissure width, seepage coefficient, and hydraulic gradient etc.
粘性土团粒间孔隙水的连通状态决定于团粒接触点附近渗透结合水膜的粘滞力和外界水力梯度的渗透力之间平衡状况；
Second, the state of inter-aggregate pore water of cohesive soil is determined by(balanced) condition between damping of bound water membrane and permeability pressure of hydraulic gradient.
试验结果表明，起动水力梯度和破坏水力梯度都随着围压的增大而增大，是由于增大围压使得颗粒间的摩擦力增大的结果。
It is found that both the initiation hydraulic gradient and the failure hydraulic gradient increase with confining pressure. This is mainly due to the increase of friction between particles.
水力机械的分离为三维流动，三维流动的侧向压力梯度产生边界层的二次流动。
The separation flow is three dimensional in hydraulic machine. The pressure gradient in cross direction produces secondary flow in boundary layer.
同时给出了壁面压强分布的规律和探讨了壁面曲率和压强梯度对溢流水力特性的影响。
Moreover we found the rule of distribution of pressure on wall surface and discussed the influence of rate of curvature and gradient of pressure on the characteristics of spill flow hydraulics.
同时给出了壁面压强分布的规律和探讨了壁面曲率和压强梯度对溢流水力特性的影响。
Moreover we found the rule of distribution of pressure on wall surface and discussed the influence of rate of curvature and gradient of pressure on the characteristics of spill flow hydraulics.
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