geography mock GCSE rivers

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  • Created by: Jessica
  • Created on: 17-11-12 13:17
what is the hydrological cycle also known as?
the water cycle
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what are the steps of the hydrological cycle?
evaporation from the sea,transpiration from the trees and land.goes into the sky as water vapor.travels using wind and precipitates (rains). surface run off,surface storage (lakes) channel flow,infiltration (in land) all back to the sea.
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infiltration
when water soaks into the soil
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percolation
water moves vertically down through soil and rock
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throughflow
water in the soil flows downhill
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ground water flow
water in rock flows downhill
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surface runoff
water flows overground
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channel flow
the flow of water in a river
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channel storage
when water is held in a river
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interception storage
when water lands on things like plants and leaves
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surface storage
held in things like lakes and puddles
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drainage basin
the area of land drained by a river
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tributary
a smaller river that joins a main river
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source
where a river starts usually in an upland area
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what are the features of the upper part of a river?
gradient-steep, v-shapes vally, steep sides, narrow, shallow channel
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what are the features of the middle part of a river?
gradient-middle, gently sloping vally sides, wider, deeper channel
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what are the features of the lower part of a river?
gradient-gentle, very wide, almost flat vally, very wide, deep channel
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interlocking spurs
hill sides that interlock with each other (looking like a zip), the river has to wind round them
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deposition
when a river drops eroded material
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transportation
the movement of eroded material
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what are the four processes of erosion?
hydraulic action ( the force of the water brakes rock particles) corasion (rocks picked up by the river scrape against the channel, wearing it away) attrition (rocks smash into each other making them smaller) corrosion (river water dissolve rocks)
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explain how ox-bow lakes are formed?
a meander get so extreem the river bursts through the meander and cuts it off. this creates an ox-bow lake
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levees
natural embankments
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deltas
low-lying areas where a river meets the sea or a lake
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what are the three types of deltas?
arcuate ( have a rounded shape and lots of distributaries) cuspate (triangular shape and few distributaries) Birds foot (shaped like a birds foot)
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whats an example of a arcuate delta?
the nile delta mediteranian see Egypt
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whats an example of a cuspate delta?
the tiber delta in italy
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whats an example of a birds foot delta?
the mississppi delta north west part of the state of mississppi usa
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whats a case study showing the features of a river?
the river Clyde, flows through scotland. flows north-west through Motherwell and Glasgow. mouth is an estuary in the west coast.
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what features does the river clyde show?
the source two tributaries (daer water and portail water) come together to form the river clyde. interlocking spurs at crawford. water fall near lanark. ox-bow lake near uddingston. meanders. glasgow built on flood plain. mouth is estuary.
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why do river flood? 5 main reasons
prolonged rainfall, heavy rainfall, snowmelt, relief, geology.
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what are the human causes for rivers flooding?
deforestation and urbanisation
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case study showing a flooding in an MEDC
Boscastle flooding
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case study showing a flooding in an LEDC
south asia (bangladesh and india) july and august, 2007 river brahmaptra and ganges
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Other cards in this set

Card 2

Front

what are the steps of the hydrological cycle?

Back

evaporation from the sea,transpiration from the trees and land.goes into the sky as water vapor.travels using wind and precipitates (rains). surface run off,surface storage (lakes) channel flow,infiltration (in land) all back to the sea.

Card 3

Front

infiltration

Back

Preview of the front of card 3

Card 4

Front

percolation

Back

Preview of the front of card 4

Card 5

Front

throughflow

Back

Preview of the front of card 5
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