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About Droughts
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About Drought
What is a drought?
A drought is a period of abnormally dry weather. Drought diminishes
natural stream flow and depletes soil moisture, which can cause
social, environmental and economic impacts. In general, the term
"drought" should be reserved for periods of moisture deficiency
that are relatively extensive in both space and time.
What causes a drought?
A drought is caused by a deficiency of rainfall and can be increased
by other factors such as high temperatures, high winds, and low
relative humidity. Drought can also result from human activities
that increase demand for water. Expanding populations, irrigation,
and environmental awareness all put pressure on water supplies.
The severity of the drought depends not only on the duration, intensity,
and geographic range, but also on the regional water supply demands
made by human activities and vegetation.
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