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What separates one drainage basin from another?
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What is the relationship between stream gradient and average stream velocity?
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exam 3--online

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QuestionAnswer
What separates one drainage basin from another? high ground
What is the relationship between stream gradient and average stream velocity? stream gradient decreases while stream velocity increase down stream
What is the correct order for where you would find stream deposits starting at the headwaters and going toward the mouth? gravel, sand, silt
The smaller the wetted perimeter... the faster the velocity
What happens to the wetted perimeter of a stream during a flood? it increases
A rapidly city within a humid climate zone experiences a land use change from perdomintly cropland to mostly urban/suburban. A likely natural response would be: reduced infiltration--increased floodingg
What is the longest river on earth? nile
Where is the majority of the earths water? oceans
Where does most evaporation of moisture to the atmosphere occur? from the oceans
What happens to most of the water falling as precipitation? it returns to the atmosphere by evaporation and transpiration
what is ultimate base level for most streams? an ocean
Besides the average precipitation, what determines the size of a stream? the drainage basin size
Which type of stream pattern is similar to the pattern formed by tree branches? dendritic
Where is stream gradient usually greatest? headwaters
What type of load are you observing when you see a muddy stream? suspended load
Where are streams most common and why? southeast US, greatest rainfall
How is stream discharge determined? depth x width x velocity
What is closely related to stream "stage"? depth
What is the average period of time that elapses between flood events of similar size? recurrence interval
What factor causes the majority of flooding most Midwestern rivers (ohio river)? brief, heavy storms
Daily stream discharge rates are displayed on these plots hydrographs
A stream with a rectangular cross section has a width of 10 ft and an average depth of 3 feet. The velocity of the water flowing through this segment of the stream is 2 ft per second. What is the discharge of the stream? 15 ft3/second
What factors incluence the way rivers flow? -the underlying geologic structure of faults and or folds -the speed with which the water is flowing -dams along a stream channel -the resistance to erosion of the materials that make up the channel
A point bar forms due to river flow slowing down on the side of meander bends, depositing sediments
A cut bank forms due to river flow speeding up on the outside of meander beds eroding sediments
A levee forms due to river flow velocity decreases, depositing sediments near the channel margins as water spreads out over a floodplain during a flood
oxbow lake forms due to as rivers cut off segments of their channel creating curvy looking lakes
The most common type of drainage basin pattern is____and it is usually associated with____ dendritic, horizontal sedimentary rocks or sediments
Created by: cbalaban
 

 



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