Coupling the Bernoulli's equation and critical tractive stress theory, a critical hydraulic gradient model based on critical velocity is developed.

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；

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With the model, many parameters can be obtained such as water head, equivalent mechanical fissure width, seepage coefficient, and hydraulic gradient etc.

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。

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