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What causes droughts?

What Are Droughts And What Are The Causes Of Drought?

  • Answer:

    A drought is a prolonged period of little or no rain. There is excessive evaporation, great heat and low humidity. The air is dry and the environment is not conducive to survival of plants and animals. There are two kinds of drought; seasonal drought and prolonged drought. Seasonal drought usually occurs in the dry season after the duration of a wet season. In the Savanna along rainy season is followed by a period of dry season where there is no rain. Droughts are common then. Animals migrate towards regions where there is rain to avoid the drought and prolonged drought takes place in deserts and semi-deserts where no rain falls for many years. In the town of Africa in the Atacama Desert in northern Chile, the drought has persisted for many years. The area has had no rain for a continuous period of 17 years. Cause of droughts; in the tropical and continental areas of temperate latitudes, most of the rain is brought by convectional currents. If there is insufficient moisture in the atmosphere to induce the formation of rain clouds for condensation to take place, no rain falls. When this period of absence of rain is prolonged, drought occurs. The Sahel region of the African Sahara is the most drought-prone region in the world. It recorded six disastrous droughts in 1970 to 1980 period.

Hassan Raza at Blurtit.com Visit the source

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The word drought refers to a lack of water. It usually refers specifically to a period of a shortage of rain fall which is damaging to the growing of crops and other plant life. The word comes from Middle English via Old English with the word dryge which simply means dry. Words such as dearth, scarcity and paucity come close as a synonyms but none have that connection to water. Of course the word drought can be and is used to mean an extreme shortage of anything. Drought affects all living animals, from cattle to fish, from birds to humans, very little survives with the absence of water. It is thought that perhaps drought is what caused the nomadic behaviour of early mankind. It certainly attributes to the migratory behaviour of some types of animal. Australia is a country which recently has suffered from an almost complete deficiency of rainfall.

Mark Westbrook

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