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WorksheetsYear 11 Rivers
Total questions: 25
Worksheet time: 50mins
What is the name of a small river/stream joining into a larger one?
source
tributary
confluence
watershed
Select all of the 'stores' that are found in the drainage basin system that appear in this list.
Precipitation
Soil Moisture
Throughflow
Groundwater
Evaporation
Water can no longer infiltrate the soil when it becomes fully or 100% (a) . (1 word)
Choose the correct keyword for this definition.
When water moves from the soil down into the bedrock due to gravity.
infiltration
percolation
throughflow
groundwater flow
Which of the following describes some characteristics of the river channel in the Upper Course?
Vertical erosion caused by high levels of deposition. Bed load is large and rounded. Channel is wide and shallow.
Vertical erosion by hydraulic action and attrition. Bed load is large and angular. Channel is narrow and shallow.
Lateral erosion by hydraulic action and attrition. Bed load is small and rounded. Channel is wide and deep.
Choose which definition is the correct one for the keyword 'attrition'
The wearing away of material by the force of the water hitting it.
The wearing away of material by bedload knocking into each other during transportation.
The wearing away of material by the force of the wind hitting it.
The wearing away of material by bedload scraping against the bed and the banks.
Transportation of the largest material will only happen when the river has lots of extra/excess ______________. (1 word).
deposition
energy
material
velocity
The process where material is bounced along the river bed.
Solution
Saltation
Suspension
Traction
Name this common river feature.
curve
gorge
meander
waterfall
In a waterfall, the overhang is made of which strength of rock?
Hard rock
Soft rock
Complete this sentence.
The overhang eventually collapses into the __________ ________ at the base of the waterfall. (two words)
(a)
From this list, choose any features which are found on the inside on a meander.
River cliff
Slip-off slope
Gorge
slow flowing current
fast flowing current
The floodplain is usually found in the lower course of a river. It has fertile soil. What has created this?
Human activity
Volcanic activity
Flooding spreading alluvium
Flooding causing plankton buildup
"A drainage basin with little vegetation is more likely to flood quickly as there is no vegetation to intercept the water and remove it from the surface runoff".
Choose the correct key term to match this description of why flooding has happened.
Precipitation
Relief
Land Use
Geology
Sometimes measures taken to manage the river can increase the amount of water in the river. Which of these describes the word 'urbanisation'?
Putting concrete into a river to speed up the movement of water in one part of the river can cause flooding further downstream
Removing trees will reduce interception and increase the amount of water going into the river system.River management
The concrete/tarmac roads and pipe/drain systems in built up areas can speed up the delivery of water back into the river channel making a flash flood more likely to occur.
As sea levels rise, there will be an increase in the amount of water available for evaporation and precipitation in the water cycle. This means that more water could be falling onto drainage basins than usual
Is deforestation a human or physical cause of flooding?
Human
Physical
Boscastle flood happened when and where?
Cornwall, 16th August 2004
Dorset, 16th August 2004
Cornwall, 18th August 2006
Dorset, 18th August 2006
Which of these was not a cause of flooding in Boscastle?
Heavy rainfall
saturated soil
convergence of 3 river basins
large, flat drainage basins
Urbanisation was a small factor in the Boscastle floods. this is because surfaces like roofs, concrete and tarmac are _______________________ meaning water cannot infiltrate.
impermeable
saturated
percolate
artificial
permeable
Name this type of flood management
dredging
artificial levee (Flood wall)
River straightening
Dam
Which of these is a soft engineering method for managing flooding.
creating storage areas.
Dams
Land use zoning
Straightening
What distance of the Mississippi river had 15m raised levees built to manage flooding?
300km
1500km
2000km
3000km
Dams could not be built on the Mississippi floodplain because it is too flat. Which tributary were 100 dams built on to reduce flooding?
Colorado
Ohio
Tennesse
Arkansas
What was done in the Tennessee River valley to reduce flooding on the Mississippi?
Washlands
Dams
Afforestation
River Straightening
What is the name for the River Basin feature represented by the red sketch line on this OS map? (1 word)
(a)
