an oasis [oˈaː.zə] (v. griech. óasis „inhabited place “; from the Semiti, old-Egyptian waset „boiler “) a vegetation mark is usually been because of a source, a water place or a Wadi in the desert. Oases can inthe size and in the character substantially vary, industry settled by the small pond surrounded by Dattelpalmen up to whole cities with - and agriculture enterprises. The traditional restaurant form, with which different cultures are combined, is the oasis economy. A special formfor water winning is the Qanate.
one differentiates between the classical well oasis, the oasis with artesischem well and the Foggara oasis. With an oasis with artesischem well flows the water, which collects itself at two mountain-slopes,underground in the valley. There it accumulates and pushes themselves upward. Oases with artesischem well are rather rare. Foggara oases are oases with a duct system, which from a remote source of water, as a Wadi water pumps to the oasis.
oasis economy is the traditional, very intensive restaurant form in the oases of dry regions. Typical characteristic of the oasis economy is the three-division by „the building of floors “. In the lowest level becomes wheat, barley, millet, different kinds of vegetable, Rice and fodder plants cultivated. In the second level low tree cultures dominate such as figs and Granatäpfel, while the third level by the Dattelpalmen are formed, their fruits the inhabitants as food basis and also as export goods serve. Furthermore oil trees become, Granatäpfel and apricot trees cultivated. The water is usually distributed in open channels according to a strictly specified pattern.
Oases were in former times supplying places for caravans and commercial centres of the Nomaden and oasis farmers, which one move here bartering practiced. Since the end that The colonial age and with beginning that oil - and the oases at meaning have natural gas extraction lost, accordingly give it today only very rarely traditional oases. Natural climatic changes and decrease of the stores of water, the end of transsaharischen caravan traffic, the meaning loss of the Dattelby changed consumer habits, the drift of the oases irrigation techniques, high working load and established becoming of the nomadischen peoples led to leeways to the marginal notety in the oases.
Some oases in the North African area experienced however a structural change, which on the development more deeplylying water reserves to lead back is. This made possible an intensification and an expansion of the agriculture and the tourism. While in former times in the oases due to its situation a Subsistenzwirtschaft had to take place and only the Dattel found as export property use, is agricultural productiontoday strengthens aligned to the market.
Also the oasis settlements changed themselves, them not only more largely became, but more to the edge the oasis corridor shifted. Reason for this is above all also the tourism, which the socio-economicSituation of the population revalues clearly. By the change and the demand for drinking water, increased thereby, the water reserves of the oases are threatened strongly and the water are missing in the oasis economy.
See also: List of the oases