changes to the water cycle Flashcards
1
Q
what 4 natural changes to the water cycle
A
- drought
- precipitation
- soil type
- storm events
2
Q
what 3 human changes to the water cycle
A
- deforestation
- water abstraction
- soil drainage
3
Q
how does drought affect
A
- lack of water
- less water in stores and less flow
4
Q
how does precipitation affect
A
-increase = flooding due to too much water to infliltrate
5
Q
how does soil type affec
A
- dry= less water can infiltrate as act as impermeable= flooding
- depending relief, surface run off could increase
6
Q
how does storm events affect
A
-global warming increase= increase temperatures= more evaporation = less terrestrial store = more in atmospheric strore
7
Q
how does water abstraction affect
A
- when water is taken from ground supplies
- problems when demand exceeds amount avliable e.g areas with high population and low rainfall
- in south London, England, they have replenshied rainfall. In winter, recharge takes place.
8
Q
how does deforestation affect
A
-decrease in evapotranspiration = less water vapour= drop In precipitation levels = less water In river
9
Q
how does soil drainage affect
A
-removes excess water from the soil profile
