水动力弥散 （Hydrodynamic dispersion）: a. 机械弥散和扩散都引起了土壤中溶质的混合和分散，在实际应用中常将两者 的作用叠加起来，称为水动力弥散（hydrodynamic dis...
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地下水水质模型是由水流问题和水动力弥散问题耦合而成。
Groundwater quality model is composed of problems of groundwater flow and dynamic dispersion.
条件模拟方法计算出的水头、流速和水动力弥散系数的标准差要小于非条件模拟的结果；
The variability of the pressure head, velocity and hydrodynamic dispersion coefficient obtained from conditional simulation are smaller than those obtained from unconditional simulation.
在一定条件下，水动力弥散作用较弱时，可应用突变界面模型来研究滨海含水层的海水入侵。
Under certain conditions, the effect of hydrodynamic dispersion is relatively weak, so that an abrupt interface approximation can be used in studying seawater intrusion in coastal aquifers.
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