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25 Cards in this Set
- Front
- Back
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runoff
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Water that doesn't sink in, but instead runs across Earth's surface.
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meandering stream
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streams that have channels with many curves
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point bar
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a pile of sand and gravel that is depositied on the inside of a meander
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meandering stream
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a river that usually develops on low slopes and carries a lot of fine sediment, such as silt and clay
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braided stream
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streams with many bars and islands separated by river channels
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Platte River is an example of...
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braided stream
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drainage basin
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specific area that is drained by a stream
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divide
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an elevated area of land that separates the drainage basin of one stream from the drainage basin of another
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load
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sediment that is carried by a stream
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3 types of load
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bed load, suspended load, dissolved load
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delta
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forms where streams deposit sediment into a body of water
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Alluvial fan
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forms where a stream deposits sediment onto a flat area of land.
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stream discharge
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the volume of water flowing through a stream in a given amount of time. Measured in meters cubed per second.
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floodplain
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region of land next to the stream channel that is covered by water during a flood
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What are 3 ways streams are formed?
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Natural lakes--formed when glaciers created large depressions in earth.
crustal movements--creating depressions that then filled with water human-made--from dams for example |
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nutrients
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compoinds such as nitrates and phosphates that are used by plants, algae, and some plankton to help them grow
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eutrophication
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an increase in nutrients and organisms that is a normal part of a lake's life. Eventually the lake will become dry land.
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turnover
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mixing of lake water that causes nutrients from deep in the lake to move upward toward the surface.
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wetlands
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areas of land that are covered with water druing some part of the year
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swamps
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wetlands where the most common types of plants are trees and shrubs...found where water is slow moving
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marsh
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a type of wetland that doesn't have many trees or shrubs...sometimes called wet meadows
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bogs
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formed in depressions that were created by glaciers...rain is the only source of freshwater here
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point source pollution
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pollution that enters water from a specific loacation...you can see exactly where the water comes from
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non-point source pollution
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when pollution comes from a wide area such as lawns, construction sites, and roads...difficult to control because it's hard to tell where it comes from
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EPA
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environmental protection agency
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