Drought

HideShow resource information
define drought
a prolonged period of time when rainfall is below average for that area
1 of 16
why do water supplies (lakes and rivers) deplete during drought?
people keep using them by they are not replenished by rainfall, high temp increases evaporation
2 of 16
what are the climate conditions that cause drought?
changes in atmospheric circulation- means it doesn't rain much in an area for years, the annual rains fail, high pressure weather systems block depressions
3 of 16
what are anticyclones?
high pressure weather systems
4 of 16
what are depressions?
weather systems that cause rain
5 of 16
why do people not move away from areas of drought?
always lived there, family, friends, job, don't think it will happen again
6 of 16
4 primary impacts of drought?
vegetation and crops die, people and animals die from dehydration, aquatic animals die, soil dies and is easily eroded
7 of 16
8 secondary impacts of drought?
death from starvation, shortage of food, desertification, conflicts over water supplies, unemployment, wildfires, psychological, dust storms
8 of 16
what human activities increase the impacts of drought?
over grazing- reduces vegetation, soil erodes. excessive irrigation- uses up water, when it evaporates it leaves salts in which crops dont grow well
9 of 16
why are impacts of drought more severe in LEDCs?
people depend on farming- livestock and livelihoods, they have less money to respond
10 of 16
5 ways to reduce impacts of drought?
prediction, farming techniques, water conservation, increase water supplies, aid
11 of 16
reducing impacts - prediction
monitoring rainfall, soil moisture and river levels- ban hosepipes, rationing water, move people
12 of 16
reducing impacts - farming techniques
drought resistant crops- millet, olives, and more efficient methods of irrigation- drip irrigation to roots (reduce evaporation)- expensive
13 of 16
reducing impacts - water conservation
low volume flush, showers, water butts to collect rainwater for garden and car
14 of 16
reducing impacts - increase water supplies
build reservoirs, wells - deplete ground water supplies so less in the future and down river (not sustainable)
15 of 16
reducing impacts - aid
emergency aid bring food and water, fund development- build wells, water pipes
16 of 16

Other cards in this set

Card 2

Front

why do water supplies (lakes and rivers) deplete during drought?

Back

people keep using them by they are not replenished by rainfall, high temp increases evaporation

Card 3

Front

what are the climate conditions that cause drought?

Back

Preview of the front of card 3

Card 4

Front

what are anticyclones?

Back

Preview of the front of card 4

Card 5

Front

what are depressions?

Back

Preview of the front of card 5
View more cards

Comments

No comments have yet been made

Similar Geography resources:

See all Geography resources »See all Natural hazards resources »