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5 cards from this section. Quick, good the night before a test.
What is permeability?
Think about how easily water flows through a sponge.
Define constant head flow.
Consider the flow rate being stable.
What method is suitable for coarse-grained soils?
Think about grain size and flow stability.
True or False: The falling head method measures flow rates by keeping the head constant.
Focus on the method's principle.
A soil sample shows a constant flow of water at a rate of 0.5 L/min with a cross-sectional area of 0.1 m² and a head drop of 2 m over a 1 m length. Calculate its permeability.
Pay attention to the units and conversions.
In a falling head test, water height drops from 80 cm to 30 cm in 15 minutes. Calculate permeability if the standpipe area is 0.05 m² and cross-section of the soil sample is 0.1 m².
Keep track of the drop in height and associated time.
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