Drought

Question 1

Meteorological reason for drought

Answer 1

refers to the level of dryness in an area, receives less precipitation than normal due to high pressure system

Question 2

Why arid regions dry

Answer 2

High pressures all year, preventing alot of clouds to be formed limiting rainfall
Prevailing wind usually comes from over land meaning it does not have moisture and it very dry

Question 3

What is Hydrological drought

Answer 3

This is the impact of reduced rainfall on a hydrological system such as:
groundwater supplies and or reservoirs do not refill
or stream flow is reduced or dries up
or lake levels drop

Question 4

Human causes

Answer 4

Dam building
Restricts flow of water
downstream affecting people
relying on water downstream
Agricultural use
Abstraction from a river
Some crops need more water e.g.
cotton
Too much water used up
Leads to drought
Deforestation
Trees reduce evaporation and add
moisture to atmosphere through
transpiration
Removing trees can reduce amount of water stored in soil and drop moisture levels