Geo 2 Flashcards
What is a delta?
When sediment-filled streams enter a large body of water, triangle section
What is the most destructive and common geologic hazard?
Floods! they are seasonal and happen often
Regional flood
Seasonal flood that results from snow melt, usually something you can prepare for
Flash floods
Rapid, little to no warnin
What is an aquitard
impermeable layer that hinders water movement
what is an aquifer
permeable rock strata that transmits groundwater freely. sand and gravel
How fast does groundwater flow?
Very slowly in comparison to surface water, important to consider when cleaning up gw pollution
Darcy’s law
A measure of the volume of water that flows through an aquifer using the hydraulic gradient, conductivity, and cross-section area.
Recite darcys law
q=KA(h1-h2)/D. h1-h2 = DH/DL
what is K in darcys law
hydraulic conductitvity
What is a drowbown
when water from the dies of the well sinks
What is subsidence?
when groundwater is pumped so fast that the ground sinks
