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Problem Set_11

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Date ________________ Name __________________ Grader ________________ Grade _____________ ------------------------------------------------------------------------------------------------------------ GLG 411 - Problem Set 11 MASS TRANSPORT OF SOLUTES: VISUAL SOLUTE TRANSPORT (VST) PURPOSE: Visual Solute Transport (VST) is a stand-alone Visual Basic 6 program (Thorbjamarson et al. 2002) which allows for data input, calculation and graphing of one-dimensional solute concentrations over time and distance. The code can be downloaded from the web site www.geology.sdsu.edu/visualsolutetransport and requires a Windows version 95/98 or higher operating system. The purpose of this lab is to acquaint you with the Parameter Help calculator and the Advection-Dispersion, 1-D Model in VST. PROBLEM: 1) Use the Parameter Help calculator in VST to answers to the following questions: a) What is the range of the aqueous molecular diffusion coefficient for inorganic cations and anions in m/yr? ________ to __________. b) Calculate the effective diffusion coefficient (D*) in m 2 /yr given a molecular diffusion coefficient of 0.12 m 2 /y and a tortuosity of 0.65. _______________. c) What is the range of hydraulic conductivity in m/y for a well sorted sand, glacial outwash? __________ to ___________. d) What is the range of effective porosity for a coarse sand? ____ to ____. e) What is the range of dispersivity in m commonly associated for laboratory or small- scale field work? What is the range in m for large-scale field work? ____________ to ____________.

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