Geography Flashcards
1
Q
what causes a storm surge
A
low pressure, High tide and strong winds
2
Q
physical cause of river flooding
A
close confluence of two rivers, little sunshine meaning low evaporation
3
Q
human cause of river flooding
A
urbanisation on floodplains and no flood defences built
4
Q
traction
A
large heavy pebbles moved by water
5
Q
saltation
A
pebbles bounce along river bed (near source)
6
Q
solution
A
transport of dissolved chemicals
7
Q
suspension
A
lighter sediment carried by water (mouth of river)
8
Q
erosion
A
breaking up rock and wearing it away
9
Q
weathering
A
breaking up rock in situ
10
Q
mass movement
A
rock moving downhill due to gravity
11
Q
deposition
A
when sediment is dropped off and left behind
12
Q
how does climate change effect rivers
A
- hot air holds more water
- frequent storms will occur
- river discharge increases
13
Q
how does weather effect rivers
A
- hot dry soil bakes soil making it impermeable
- increases surface run off
- water returns to river faster, river discharge increases
