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WorksheetsRiver hydrographs 1st Year
Total questions: 40
Worksheet time: 20mins
What is meant by the term precipitation?
rain, sleet, hail and snow
water caught by leaves of trees
water sinking into the ground
rocks that allow water to sink in
What is the imaginary line surrounding a river basin called?
watershed
border
sky
sea
What is the area of land surrounding a river called, from where it collects rain?
drainage basin
stream
hills
fields
Discharge is the volume of water flowing down a river in cumecs which means...
cubic metres per second
column of water passing a point
stream depth in metres
speed of the river in centimetres per second
What is Label 1 showing on this hydrograph?
the peak discharge (maximum flow)
the base discharge (normal river flow)
peak rainfall
The highest river level reached after heavy rain is called...
peak discharge
normal flow
drought
peak rainfall
On this hydrograph what is the arrow pointing to?
stream flow
rainfall amount
depth of river
On a hydrograph what is shown by the blue line labelled at 1?
river discharge (flow)
rainfall
amount of sunshine
Line 1 on a hydrograph shows a...
rising river discharge
falling river discharge
peak discharge
steady discharge
Line 2 on a hydrograph shows a...
rising river discharge
falling river discharge
peak discharge
steady discharge
Line 3 on a hydrograph shows a...
rising river discharge
falling river discharge
peak discharge
steady discharge
Label 1 shows the time between peak rainfall and peak discharge. This is called...
lag time
delay time
past time
lazy time
What is meant by the term infiltration?
rain, sleet, hail and snow
water caught by leaves of trees
water sinking into the ground
rocks that allow water to sink in
What is meant by the term "permeable"?
rain, sleet, hail and snow
water caught by leaves of trees
water sinking into the ground
rocks or soil that allow water to sink in
An example of a permeable rock is...
chalk
clay
granite
What is "urbanisation"?
more people living in cities causing urban areas to grow
population increase in a country
people moving to the countryside
fewer people living in cities causing a lower population
Why does urbanisation cause increased flooding?
building roads and houses means the ground becomes impermeable.
building roads and houses means the ground becomes permeable.
What is deforestation?
cutting down trees
planting trees
building houses
turning land into deserts
Which one will cause MORE river flooding?
permeable rocks
forests
dams
cities (urban areas)
Steep valley sides cause rivers to flood more easily because...
rainwater flows faster down steep slopes to the river
houses are built close together in narrow valleys
valleys are narrow so the water flows faster
A river is more likely to flood (have a quick response to rain)... IF...
the river valley has steep sides
the river valley has gently sloping sides
What is meant by the term interception?
rain, sleet, hail and snow
water caught by leaves of trees
water sinking into the ground
rocks that allow water to sink in
If the land is covered in trees, rainwater will reach the river .................... .
more quickly
more slowly
Which hydrograph, 1 or 2, is more likely to show a river with more trees growing in the drainage basin?
1
2
If the land is covered in houses, roads and factories, the rainwater will reach the river...
more quickly
less quickly
Urban areas, towns and cities, cause more flooding because...
tarmac and concrete surfaces are impermeable so water runs quickly across the surface into rivers
tarmac and concrete are permeable and allow water to sink in
gutters and drains slow down water getting to rivers
roads are flat so water flows more slowly
Which hydrograph, 1 or 2, is more likely to show a river with more towns and cities in the drainage basin?
1
2
Impermeable rock is one which...
does not let water pass through
lets water pass through
Which hydrograph, 1 or 2, is more likely to show a river with a PERMEABLE rock type like Chalk?
1
2
If a dam is built across a river, flood water will be held back and this will...
increase the lag time
decrease the lag time
Which hydrograph, 1 or 2, is more likely to show a river with a DAM built in the valley?
1
2
When rainfall is very heavy and lasts a long time there will be.......
more surface runoff
less surface runoff
Which hydrograph, 1 or 2, is more likely to show a river with STEEP VALLEY SIDES?
1
2
If the land is frozen...
rain will not sink in and rivers can flood more easily
rain will sink in quickly and reduce river flooding
Which hydrograph, 1 or 2, shows a river where snow is melting quickly?
1
2
Label 1 on this meander shows ...
a slip-off slope
a river cliff
the thread of fastest flow
hydraulic action
Which one will cause LESS river flooding?
impermeable rocks
forests
steep slopes
cities (urban areas)
Very wet, saturated, soil will cause ...
more surface runoff because less water will sink in
less surface runoff because more water will sink in
Label 2 on this meander shows ...
a slip-off slope
a river cliff
deposition
the fastest flow
The main process taking place at label 2 on this meander is...
erosion
deposition
