Professional Development for Health & Safety Experts
CHMM Question 06/01/2017 – Environmental Transport
The rate of groundwater movement is directly measured using which two of the following methods? A. B. C. D.
Radiometric Radiometric dating techniques techniques using C-14 in dissolved dissolved carbon dioxide dioxide Utilization of Darcy’s law Adding a visible dye to a well and measuring time to detection at another well Adding tritiated water to a dye and measuring for activity at another well
(Solution on next page)
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Professional Development for Health & Safety Experts
Solution: Direct measurement of groundwater movement rate can be performed by measuring C14 in dissolved carbon dioxide, as well as by adding a visible dye to a well and measuring the time until the dye is found in another well. Tritiated water ( 3H2O) is radioactive and would not be purposefully added to a groundwater well. Darcy’s Law might allow you to estimate the rate of groundwater movement, but it would not be a direct measurement. The correct solution is A and C.
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