OASES OF THE WORLD
B. DAKHLA OASIS, EGYPT
C. SIWA OASIS, EGYPT
D. GHARDAIA OASIS, ALGERIA
E. GUERRARA OASIS, ALGERIA
F. KUFRA OASIS, LYBIA
G. SAN PEDRO DE ATACAMA, CHILE
H. EN GEDI OASIS, ISRAEL
I. TURPAN OASIS, CHINA
J. YZAD OASIS, IRAN
K. TAYMA OASIS, SAUDI ARABIA
Oasis is a Greek word and means “inhabited place”.
An oasis is an area covered with vegetation in the desert. Because of different water sources oases can be classified into the following groups:
- Groundwater oasis:
The water is brought to the surface with a pump or a well
- River water oasis:
A river supplies the oasis with water from rain-laden areas.
- Spring water oasis:
A spring water oasis is located at places where groundwater table reaches the earth’s surface. It is the most common type of oasis.
- Oasis with an artesian well:
The groundwater rises to the surface because of overpressure.
Oases were once very important for the caravan trade and agriculture but they lost their importance in times of modern transportation techniques. One of the most important products was once the date. But some of the North African oases had a structural change and could intensify their agriculture because of the use of deeper laying water resources.
One of the biggest problems of oases is still the salinisation. It occurs whenever water evaporates because the soluble salts remain in the soil. The salinisation in some oases is extended so far that agriculture is not possible anymore.
A. DAKHLA OASIS, EGYPT
Dakhla Oasis, Egypt, co-ordinates: 28°59'18.21"E, 25°30'45.48"N
B.SIWA OASIS, EGYPT
Siwa Oasis, Egypt, co-ordinates: 25°32'3.60"E, 29°13'21.74"N
C. GHARDAIA OASIS, ALGERIA
Ghardaia Oasis, Algeria, co-ordinates: 3°40'47.07"E, 32°29'19.07"N
D. GUERRARA OASIS, ALGERIA
Guerrara Oasis, Algeria, co-ordinates: 4°40'7.51"E, 32°46'41.86"N
E. KUFRA OASIS, LYBIA
Kufra Oasis, Lybia, co-ordinates: 23°19'10.79"E, 24°8'49.35"N
F. SAN PEDRO DE ATACAMA, CHILE
San Pedro de Atacama, co-ordinates: 68°12'6.71"W, 22°55'5.98"S
G. EN GEDI OASIS, ISRAEL
En Gedi Oasis, Israel, co-ordinates: 35°23'30.99"E, 31°27'29.24"N
H. TURPAN OASIS, CHINA
Turpan Oasis, China, co-ordinates: 89°6'3.08"E, 42°51'35.33"N
I. YAZD OASIS, IRAN
Yazd Oasis, Iran, co-ordinates: 54°21'38.45"E, 31°53'47.80"N
J. TAYMA OASIS, SAUDI ARABIA
Tayma Oasis, Saudi Arabia, co-ordinates: 38°33'36.82"E, 27°37'37.95"N