CEE 153 F07 PS5

# CEE 153 F07 PS5 - UNIVERSITY OF CALIFORNIA LOS ANGELES...

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UNIVERSITY OF CALIFORNIA, LOS ANGELES Civil and Environmental Engineering Department CEE 153 Introduction to Environmental Engineering Science Fall Term 2007 T-Th 2-4 PM 5200 Math Science Prof. K. D. Stolzenbach 5732J Boelter Hall, 206-7624 [email protected] Problem Set # 5 (due Thursday November 15) _____________________________________________________________________________ 1. In a laboratory test, a one cubic foot sample of an aquifer saturated with water was found to weigh 85 pounds. After being allowed to drain thoroughly, the sample weighed 73 pounds. After being crushed and thoroughly dried, the sample weighed 51 pounds. Calculate the specific yield, the porosity, the specific retention, and the specific gravity of the solids (ratio of the solid density to that of water). The density of water is 62.4 lb/ft 3 . [0.19, 0.54, 0.35, 1.78] 2. Radioactive material is spilled accidentally into an unconfined aquifer. The groundwater elevation of the aquifer at the site of the spill is 20 m above the water surface of a river two kilometers away. Neglecting any effects of retardation, and using the typical values of K and η from the text, estimate the length of time required for the material to reach the river if the aquifer material is:

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## This note was uploaded on 05/19/2011 for the course CEE 153 taught by Professor Stolzenbach during the Fall '08 term at UCLA.

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CEE 153 F07 PS5 - UNIVERSITY OF CALIFORNIA LOS ANGELES...

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