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29 Cards in this Set
- Front
- Back
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Dendritic pattern
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resembles the branching of a tree
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Rectangular pattern
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a network of channels with right-angle bends that form a pattern of interconnected rectangles and squares
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Radial pattern
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channel flow from a central area, resembling the spokes of a wheel
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Centripetal pattern
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channels converge on a central point
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Annular pattern
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a set of incomplete concentric rings of streams connected by short radial channels
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Trellis pattern
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resembles a vine or climbing rose bush growing on a trellis
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Deranged pattern
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a random pattern of stream channels that seem to have no relationship to underlying rock types or geologic structures
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drainage basin
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entire area of land that is drained by one stream
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divides
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linear boundaries that separate one drainage basin from another
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uplands
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the smallest valleys in a drainage basin occur at its highest elevation
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head
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tributary's point of origin
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headward erosion
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eroded sediment is transported downstream by the tributaries
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mouth
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the end of the river valley
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gradient
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steepness of a slope
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base level
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lowest level to which a stream can theoretically erode
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discharge
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rate of a stream flow at a given time and location
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load
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amount of material that is transported by stream
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Floodplains
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develops when alluvium accumulates landward of the river banks
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yazoo tributary
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tributary that cannot breach a river's levee
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cutbanks
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erosion occurring on the outer edge of meandering streams
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point bar
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accumulate along the inner edge of meanders
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oxbow lake
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cut off the outer edge of a meander, abandoning it
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mass wastage
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downslope movement of earth materials
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braided stream
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braided channels with linear underwater sandbars
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stream terraces
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stream valleys that have level surfaces that are higher than present floodplains
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delta
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where a stream enters a lake, ocean or dry basin its velocity decreases dramatically. The stream drops its sediment load which accumulates as a triangular deposit
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alluvial fan
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fan shaped deposit of stream sediment
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normal stage
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when the water level of a river is below the river's banks
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flood stage
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when the water level exceed the banks
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