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(a) What is the longitudinal dispersion coefficient for groundwater flowing through a gravel aquifer? Use the following information: specific discharge =2.3e3cm/s, porosity =0.4, and use

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(a) What is the longitudinal dispersion coefficient for groundwater flowing through a gravel aquifer? Use the following information: specific discharge =2.3e3cm/s, porosity =0.4, and use geometric mean of gravel size range to approximate median grain diameter. (b) What has a greater impact on longitudinal dispersion, mechanical dispersion or molecular diffusion

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