依据河道比降的变化情况，对不同河段的纵向扩散系数进行估值。
Considering the change of stream gradient, we estimated the parameter of longitudinal coefficient of diffusion in different reaches.
在井巷紊流传递过程中，纵向弥散系数远远大于紊流扩散系数。
In mine mass transfer the longitudinal dispersion coefficient is by far greater than the turbulent diffusion coefficient.
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