以下为句子列表：
英文: Additional analysis demonstrates the sensitivity of both variance and coefficient of variation of plume concentration to the various variances of hydraulic conductivity field.
中文: 另外还分析了污染羽在各点的浓度变化方差和变异系数分别随渗透系数变异方差的变化状况。
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英文: For example, at pore-water pressures of zero and greater, (i.e. below the water table), there is a saturated conductivity value; at pore-water pressures less than zero, (i.e. above the water table), the hydraulic conductivity is zero.
中文: 比如：当孔隙水压力大于等于0(如位于水位以下)，有一个饱和的导水值；当小于0时(如在水位以上),导水性为0。
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英文: For the contaminant plume examined in this synthetic example study the spatial second moments defining the spread of the contaminant plume around its centroid increase with the enlargement of the variance of hydraulic conductivity distribution, while the
中文: 实例研究表明，污染物在含水层中运移过程中污染羽的展布范围（二阶矩）随着渗透系数空间变异方差的增大而扩大，而污染羽在空间上的质心位置（一阶矩）基本不受方差的影响，仅取决于渗透系数随机场的均值大小。
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英文: In soils, the hydraulic conductivity and the water content, or water stored, changes as a function of pore-water pressure.
中文: 在土中，水的传导性和含水量、或者储水量，虽则孔隙水压力成函数变化。
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英文: Its main steps are as follows: (1) to determine the tensor of hydraulic conductivity of the rock mass near the ground; (2) to back-analyzing of stress field; (3) to predict the fissure aperture at different levels; (4) to suppose the structure of fissure
中文: 其主要思想是，首先确定近地表岩体的渗透张量；根据地应力实测资料进行地应力场的量级反演；选择适当的裂隙开度-应力模型，预测不同深度的裂隙开度；在裂隙网络结构不随深度变化这一假定的基础上，计算隧道标高的围岩渗透性。
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