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chapter 10 and 18

Quiz yourself by thinking what should be in each of the black spaces below before clicking on it to display the answer.
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Question
Answer
what is recurrence interval?   average time between floods of a given discharge  
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flash flood?   local sudden short floods  
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how gradient affects velocity   high gradient high velocity erosion and transport, drop in gradient drop in velocity, deposition  
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different ways in which a stream transports sediment   bed load, suspended load, and dissolved load  
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what is bed load   sand and gravel spend most of their time on the stream bed  
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what is suspended load   silt and clay spend most of their time suspended above the bed  
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what is dissolved load   soludable products of chemical weathering usually invisible  
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what is downcutting   deepening of the valley by erosion of a stream bed  
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what is base level?   sea level rise or drop, tectonic upift. Base level drops renewed downcutting. base level rises lateral erosion  
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what is bars?   sand and gravel on the beds or banks of a stream. larger streams sand bar. Smaller streams gravel bars  
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braided streams?   network of interconecting channels around numerous bars common in arid regions  
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meandering streams?   is a bend. common in humid regions  
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cut bank?   outer part of a stream bend, erosion on outside  
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point bar?   inside part of the stream bend, deposition on inside  
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oxbow lake?   cut off of the river  
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delta?   when stream runs into a standing body of water, tends to form thick sediments  
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alluvial fan?   they form on land, really common on desert regions  
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what are the stream deposits?   bars, braided stream, meandering, cut bank, point bar, oxbow lake, delta, alluvial fan,  
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drainage patterns?   dendritic, radial, and trellis  
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dendritic?   tree shaped, horizontal sedimentary  
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radial?   splitting apart, volcanic landforms  
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trellice?   bunch streams moving downward with small branches  
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what is drainage basin?   its an area involves stream and land. the entire area drained by a stream and its tributaries  
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floodplain?   part of the riversystem. it is an area capable of being flooded  
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saltation?   series of hops and bounces  
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drainage divide?   an elevated boundary that separates neighboring drainage basins.  
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