Mississippi		an area along a river formed from sediments deposited by rivers
artesian spring		the removal and transport of material by wind, water, or ice
point-source pollution		smaller stream or river that flows into a larger one
ground water		the land drained by a river system, which includes the main river and all its tributaries
rapids		a rock layer that stores and allows the flow of ground water
nonpoint-source pollution		the materials carried in a stream's water
alluvial fan		continuous movement of water
divide		pollution that comes from many sources
deposition		the path a stream flows
channel		a factory that cleans waste materials out of water that comes from sewers and drains
recharge zone		amount of open space between individual rock particles
permeability		an underground boundary where the zone of aeration and saturation meet
delta		rocka nd soil deposited in streams
alluvium		a spring that forms where cracks occur naturally in the cap rock and the water flows through
erosion		the feature that is common in youthful river channels
drainage basin		water that is located within rocks below the earth's surface
tributary		an area of higher ground that separates drainage basins
porosity		large, underground tank that collects and cleans waste water from a household
sewage treatment plant		fan shaped deposits of alluvium that form on dry land
septic tank		a fan shaped deposits of alluvium at the mouth of a stream
flood plain		a rock's ability to let water pass through it
aquifer		the process by which material is dropped or settles
water cycle		the ground surface where water enters an aquifer
load		pollution that comes from one particular source area
water table		he largest drainage basin in the United States