revision questions on rivers and flooding Flashcards
what does the hydrological cycle show?
the movement of water in a cycle
what happens at a confluence?
two or more rivers meet
what is biological weathering?
weathering that is caused by things such as roots from plants
what is corrasion?
a type of erosion
how is a gorge formed
by a waterfall retreating
what is a flood plain?
the area of land that the river would flood
where is the current fastest in a meander?
on the outside of the bend
name the land form created when a meander is cut off by deposition?
an ox-bow lake
what is river discharge?
the amount of water in the river
how does impermeable rock affect river discharge?
because the water doesn’t percolate into the rock and instead run off is increased which also increases the discharge of the river
describe one physical cause of flooding?
- prelonged rain fall
- heavy rainfall
- snow melt
- relief
- geology
describe one human cause of flooding?
- deforestation
- urbanisation
name a hard engineering method for flooding?
- dams and reservoirs
- channel straightening
- man-made levees
name a soft engineering method for flooding?
- flood warnings
- preparation
- flood plain zoning
