Drought

related topics
{island, water, area}
{country, population, people}
{disease, patient, cell}
{rate, high, increase}
{company, market, business}
{household, population, female}
{work, book, publish}

A drought (or drouth [archaic]) is an extended period of months or years when a region notes a deficiency in its water supply. Generally, this occurs when a region receives consistently below average precipitation. It can have a substantial impact on the ecosystem and agriculture of the affected region. Although droughts can persist for several years, even a short, intense drought can cause significant damage[1] and harm the local economy.[2]

This global phenomenon has a widespread impact on agriculture. The United Nations estimates that an area of fertile soil the size of Ukraine is lost every year because of drought, deforestation, and climate instability.[3] Lengthy periods of drought have long been a key trigger for mass migration and played a key role in a number of ongoing migrations and other humanitarian crises in the Horn of Africa and the Sahel.

Contents

Consequences

Periods of drought can have significant environmental, agricultural, health, economic and social consequences. The effect varies according to vulnerability. For example, subsistence farmers are more likely to migrate during drought because they do not have alternative food sources. Areas with populations that depend on subsistence farming as a major food source are more vulnerable to drought-triggered famine.

Drought can also reduce water quality, because lower water flows reduce dilution of pollutants and increase contamination of remaining water sources. Common consequences of drought include:

Full article ▸

related documents
Geography of El Salvador
Hot spring
Geography of Cameroon
Geography of Nauru
Geography of Côte d'Ivoire
Flood
Orogeny
Caldera
K2
Rodinia
Geography of Chile
Saaremaa
Estuary
Upwelling
Backergunje
Aral Sea
Hail
Mountain
Atoll
Storm
Geography of Bahrain
Geotechnical engineering
Geography of Antigua and Barbuda
Darling Scarp
Cook Strait
Geography of the Isle of Man
Kosciuszko National Park
Gulf of Mexico
Geography of Hungary
Sable Island