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Cards In This Set
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Evapotranspiration
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Plants take up water from the soil and transport it to leaves, where it evaporates
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Aquifer
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The porous layer that becomes saturated with water
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Unconfined Aquifer
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Usually occurs near the land's surface where water enters the aquifer from the and above it.
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Water Table
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The top layer is saturated with water
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Confined Aquifer
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Is bounded on both the top and bottom by layers that are impervious to water and is saturated with water
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Activated Sludge System
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Method of treating sewage in which some of the sludge is returned to aeration tanks where it is mixed with incoming waste water to encourage degradation of the wastes in sewage.
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Secondary Sewage System
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Process that involves holding the waste water until the organic material has been degraded by bacteria and other microorganisms
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Sewage Sludge
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Mixture of organic material, organisms, and water in which the organisms consume the organic matter.
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Non-point Source
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Diffuse pollutants, such as agricultural runoff, road, salt and acid rain, that are not from a single confined source.
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Trickling Filter System
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Secondary sewage treatment technique that allows polluted water to flow over surfaces that harbor microorganisms.
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In-Stream Uses
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Use of a stream's water flow for such purposes as hydroelectric power, recreation, and navigation
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Tertiary Sewage Treatment
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Process that involves a variety of different techniques designed to remove dissolved pollutants left after primary/ secondary treatments
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BOD
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Amount of oxygen required by microbes to degrade organic molecules in adequate ecosystems
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Eutrophication
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Enrichment of water with nutrients
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Primary Sewage
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Process that removes large particles by settling or filtering raw sewage through large screens
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