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12 Cards in this Set

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groundwater
water in the zone of saturation
hydrologic cycle
the unending circulation of Earth's water supply. the cycle is powered by energy from the sun and is characterized by continuous exchanges of water among the oceans, the atmosphere, and the continents
runoff
water that flows over the land rather than infiltrating into the ground
transpiration
the release of water vapor to the atmosphere by plants
drainage basin
the land area that contributes water to a stream
divide
an imaginary line that seperates the drainage of two streams; often along a ridge
factors that influence stream velocity
1-gradient
2-shape, size, and roughness of channel
3-discharge
gradient
the slope of a stream; generally expressed as the vertical drop over a fixed distance
meander
a loop-like bend in the course of a stream
discharge
the quantity of water in a stream that passes a given point in period of time (meters^3/sec)

(channel width-m X channel depth-m X velocity-m/s)
longitudinal profile
a cross section of a stream channel along its descending course from the head to the mouth
mouth
the point downstream where a river empties into another stream or water body