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WorksheetsRiver hazard and opprotunities
Total questions: 10
Worksheet time: 5mins
A ........... great enough to cause a body of water to overflow its channel and submerge the surrounding land.
discharge
velocity
erosion
deposition
flooding that caused by human activities
Heavy rainfall
Deforestation
Coastal influence
none of them
Climatological factors of floods
Intense rainfall
Nature of drainage basin
Urbanization
coastal influence
coastal influences of flood, except...
High seasonal tides
Storms surges
Tropical cyclone
earthquakes
benefits of flooding, except
Provides nutrient-rich sediment for agriculture in the dry season
Crops ruined and farmlands saturated for months
Flushes pollutants and pathogens away from domestic areas
Replenishes groundwater reserves
•This uses technology, large amounts of money to try and control the river.
•It can prevent floods in the short term.
•In the long term the river will try to get out of this ‘straight jacket’ and the floods can be made worse as a result.
above is the characteristics of......
Hard engineering
Soft engineering
mix engineering
river prevention methods
what is it called?
Dams
Reservoir
Embankments
Artificial levees
Meanders are removed from a river, this means the water has less distance to travel and can therefore be removed quicker. However, it increases erosion and flooding downstream. Straightening increases the rivers.
what is that method called?
river meandering
river straightening
diversion spillways
flood wall
Often the cheaper option. It tries to work with the river. People seek to sustainably manage the river – work with the river to stop large scale damage from floods.
above is the characteristics of ....
Hard engineering
Soft engineering
Mix engineering
River floods prevention methods
the advantages of soft engineering
More expensive
More attractive
Destroying environment
Short term effect
