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2 cards from this section. Quick, good the night before a test.
Define elevation head.
Think about how high something is compared to a baseline level.
What does pressure head measure?
Consider what pressure is exerted by a column of water.
What is total head comprised of?
Think of what gives water its potential energy.
True or False: The velocity head is always a significant component of total head in soils.
Consider velocity's effect on flow through pores.
A soil sample has an elevation head of 3 m and pressure head of 1.5 m. Calculate the total head. If the soil's permeability is 5 cm/s and the hydraulic gradient is 0.1, what is the flow velocity?
Calculate total head first, then apply Darcy’s law for flow velocity.
If a point in a soil body has a pressure head of 2 m, and the elevation head is 4 m, how does this influence the total head and subsequent water flow when comparing two different soil types with varying permeabilities?
Think about how total head conditions would influence water movement through soil.
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