Oases


Also found in: Dictionary, Thesaurus, Medical, Acronyms, Idioms.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Oases

 

regions in deserts and semideserts with intensive agriculture on irrigated land or tracts with trees, shrubs, and herbaceous vegetation. They occur wherever an area receives more water than the surrounding regions. Natural watering is provided by fresh groundwater lying close to the surface, springs, periodic flooding, and the overflow of rivers, and artificial watering is made possible by irrigating with water from rivers, lakes, canals, and wells. Oases vary in size from dozens of hectares to tens of thousands of square kilometers (for instance, the Nile Valley in Africa, the lower reaches of the Amu Darya, and the Fergana Valley in Middle Asia). Oases are populated areas in deserts where food and industrial crops, especially cotton, are cultivated.

Ice-free areas in Antarctica are also called oases.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
References in periodicals archive ?
Urban oases use off-site water for parks and sporting facilities.
"Plain oases and urban oases are non-traditional oases that can only be irrigated by modern techniques.
"OSS also calls on all countries to work to protect oases and consider them as a national environmental, civilisational, cultural, local and international heritage," he added.
He went on saying that it is important to preserve oases not only as regional heritage but also as international heritage.
The date palms and oases have given Al Ain the tag of Oasis City.
Problems identified in these two oases include the high cost and scarcity of irrigation water, which, according to the same source, requires irrigation well equipment and solar energy connection to reduce irrigation costs.
It also includes providing means to establish a monitoring system for oases, considered among the most fragile agricultural and environmental systems, due to climate change or mismanagement.
In this context, Abdeddaem recalled that "the total area of the Tunisian oases is 40 thousand ha, one third of which (1/3) are former oases suffering from the problems of climate change, water deficit and Urbanization, as well as the multiplication of the number of interveners in this field ".