droughts

Question 1

def. arid

Answer 1

an environment that receives less than 250mm of rainfall annually ( extremely dry)

Question 2

def. drought

Answer 2

a prolonged period of abnormally low rainfall, leading to a shortage of water

Question 3

name the two natural causes of a drought

Answer 3

Meteorological

Hydrological

Question 4

meteorological drought?

Answer 4

when the amount of precipitation received in a specific area is less than the average.

Question 5

hydrological drought?

Answer 5

when reduced precipitation impacts on water supply

restriction in water

Question 6

name 3 human causes of a drought

Answer 6

deforestation
agriculture
dam building

Question 7

how can deforestation effect droughts

Answer 7

trees reduce evaporation, store water

leads ground vulnerable to erosion

Question 8

how can agriculture effect droughts

Answer 8

using large amounts of water to irrigate crops removes water from lakes, rivers and groundwater

Question 9

irrigation def.

Answer 9

supply water to land or crops to help growth

Question 10

how does dams effect droughts

Answer 10

large dams can be built across a river (to produce electricity and store water in a reservoir). (This can reduce river water flowing downstream) and cause drought below the dam.