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Problem Set_10

# Problem Set_10 - Date Grader Name Grade GLG 411 Problem Set...

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Date ________________ Name __________________ Grader ________________ Grade _________________ ----------------------------------------------------------------------------------------------------------------- GLG 411 - Problem Set 10 MASS TRANSPORT OF SOLUTES: ONE- DIMENSIONAL ATTENUATION PURPOSE: The purpose of this problem set is to introduce the student to the concept of solute transport and attenuation using a simple one-dimensional equation that enables values of attenuated concentration to be estimated at points downgradient of the source of contamination. PROBLEM: A underground storage tank is leaking a solution with a boride concentration of 500 mg/L. The solution enters an unconfined aquifer that has a hydraulic conductivity of 4.0 x 10 -3 cm/s and an effective porosity of 2 x 10 -1 . The water table associated with the aquifer has a gradient of .0015 and the effective diffusion coefficient for the solution is estimated to be 1 x 10 -9 m 2 /sec. Read section 10.6.1-6 in your text and examine the solution of the sample problem presented on page 406. Apply the same method to

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