12 Exercises

One method to analyze soil and rock cores collected during drilling is to measure hydraulic properties of small centimeter-sized samples removed from the larger core (“core plugs”) in a laboratory. Before the results can be used for flow simulations, calculations of bulk properties are required.

Consider the following core collected from a deposit of layered silt and sand. The core is 1.22 meters long, and oriented vertically. Hydraulic conductivity was calculated for five core plugs:

Figure for Exercise 1

Exercise 1

If only the flow of groundwater through the sand is significant, what is the net/gross ratio of this core?

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Exercise 2

What are the calculated bulk vertical and horizontal hydraulic conductivities of the representative volume?

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Exercise 3

What else would you need before using the calculated bulk hydraulic properties for a flow model?

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Geologic Frameworks for Groundwater Flow Models Copyright © 2020 by J.P. Brandenburg. All Rights Reserved.