Resource Mapping

Tuesday, March 13, 2007

OASES OF THE WORLD

A. INTRODUCTION

B. DAKHLA OASIS, EGYPT

DAKHLA OASIS: IMAGE 1
DAKHLA OASIS: IMAGE 2
DAKHLA OASIS: IMAGE 3
DAKHLA OASIS: IMAGE 4

C. SIWA OASIS, EGYPT

SIWA OASIS: IMAGE 1
SIWA OASIS: IMAGE 2
SIWA OASIS: IMAGE 3
SIWA OASIS: IMAGE 4

D. GHARDAIA OASIS, ALGERIA

GHARDAIA OASIS: IMAGE 1
GHARDAIA OASIS: IMAGE 2
GHARDAIA OASIS: IMAGE 3
GHARDAIA OASIS: IMAGE 4

E. GUERRARA OASIS, ALGERIA

GUERRARA OASIS: IMAGE 1
GUERRARA OASIS: IMAGE 2
GUERRARA OASIS: IMAGE 3
GUERRARA OASIS: IMAGE 4

F. KUFRA OASIS, LYBIA

KUFRA OASIS: IMAGE 1
KUFRA OASIS: IMAGE 2
KUFRA OASIS: IMAGE 3
KUFRA OASIS: IMAGE 4

G. SAN PEDRO DE ATACAMA, CHILE

SAN PEDRO DE ATACAMA: IMAGE 1
SAN PEDRO DE ATACAMA: IMAGE 2
SAN PEDRO DE ATACAMA: IMAGE 3
SAN PEDRO DE ATACAMA: IMAGE 4

H. EN GEDI OASIS, ISRAEL

EN GEDI OASIS: IMAGE 1
EN GEDI OASIS: IMAGE 2
EN GEDI OASIS: IMAGE 3
EN GEDI OASIS: IMAGE 4

I. TURPAN OASIS, CHINA

TURPAN OASIS: IMAGE 1
TURPAN OASIS: IMAGE 2
TURPAN OASIS: IMAGE 3
TURPAN OASIS: IMAGE 4

J. YZAD OASIS, IRAN

YZAD OASIS: IMAGE 1
YZAD OASIS: IMAGE 2
YZAD OASIS: IMAGE 3
YZAD OASIS: IMAGE 4

K. TAYMA OASIS, SAUDI ARABIA

TAYMA OASIS: IMAGE 1
TAYMA OASIS: IMAGE 2
TAYMA OASIS: IMAGE 3
TAYMA OASIS: IMAGE 4



A. INTRODUCTION

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.


B. DAKHLA OASIS, EGYPT

Dakhla is one of the five western oases in the Libyan Desert in Egypt. The 14 villages are situated in a swale surrounded by rocks and are home to 70.000 people. The oasis has 30.000 ha cultivable land where basically date palms, citrus fruits and mulberrys are grown.


DAKHLA OASIS: IMAGE 1

NORTH EAST VIEW
















This image shows an overview of the Dhakla Oasis facing north east.
Co-ordinates: 28°59'18.21"E, 25°30'45.48"N, width of image: 79,81km

DAKHLA OASIS: IMAGE 2

NORTH WEST VIEW
















This image shows the water sources of the Dakhla Oasis facing north west.
Co-ordinates: 28°59'18.21"E, 25°30'45.48"N, width of image: 2,35km

DAKHLA OASIS: IMAGE 3

NORTH WEST
















This image shows fields and irrigation system in the Dakhla Oasis facing north west.
Co-ordinates: 28°59'18.21"E, 25°30'45.48"N, width of image: 250m.

DAKHLA OASIS: IMAGE 4

NORTH VIEW
















This image shows huge salinsation of fields in the Dakhla Oasis facing north.
Co-ordinates: 28°59'18.21"E, 25°30'45.48"N, width of image: 720m.


C. SIWA OASIS, EGYPT

Siwa is also one of the five western oases in the Libyan Desert in Egypt. This oasis is 80km long, 2- 20km wide and located 18m under the sea level. In several villages live about 23.000 people. Most of them are farmers that cultivate date palms and olive trees.


SIWA OASIS: IMAGE 1

NORTH VIEW
















This image shows an overview of the Siwa Oasis facing north.
Co-ordinates: 25°32'3.60"E, 29°13'21.74"N, width of image:39,89km.

SIWA OASIS: IMAGE 2

NORTH VIEW
















This image shows a village in the Siwa Oasis facing north.
Co-ordinates: 25°32'3.60"E, 29°13'21.74"N, width of image: 3,97km.


SIWA OASIS: IMAGE 3

NORTH VIEW
















This image shows fields and the irrigation facing the north.
Co-ordinates: 25°32'3.60"E, 29°13'21.74"N, width of image: 270m.

SIWA OASIS: IMAGE 4

EAST VIEW
















This image shows salinisation and huge water channels facing east.
Co-ordinates: 25°32'3.60"E, 29°13'21.74"N, width of image: 2,15km.



D. GHARDAIA OASIS, ALGERIA

Ghardaia (Algeria) is located in a valley called M`zab in the nothern part of the Sahara. The wadi Mzab supplies all oases in the valley with water after heavy rainfalls. In several smaller towns and villages live 82500 people. Most of them are farmers and cultivate date palms. Ghardaia has its own airport and exports not only dats but also petroleum and natural gas.


GHARDAIA OASIS: IMAGE 1

EAST VIEW
















Overview of the Ghardaia Oasis in Algeria facing west.
Co-ordinates: 3°40'47.07"E, 32°29'19.07"N, width of image: 11,56km.

GHARDAIA OASIS: IMAGE 2

NORTH WEST VIEW
















Village in the Ghardaia Oasis. View: north west.
Co-ordinates: 3°40'47.07"E, 32°29'19.07"N, width of image: 760m.

GHARDAIA OASIS: IMAGE 3

SOUTH EAST VIEW
















This Image shows some fields in the Ghardaia Oasis facing east.
Co-ordinates: 3°40'47.07"E, 32°29'19.07"N, width of image: 500m

GHARDAIA OASIS: IMAGE 4

WEST VIEW















This image shows a riverbed in the Ghardaia Oasis facing west.
Co-ordinates: 3°40'47.07"E, 32°29'19.07"N, width of image: 2,65km


E. GUERRARA OASIS, ALGERIA

Guerrara is also an Oasis in the M`zab valley. (no more information available)

GUERRARA OASIS: IMAGE 1

NORTH VIEW
















Overview of the Guerrara Oasis in Algeria facing north.
Co-ordinates: 4°40'7.51"E, 32°46'41.86"N, width of image:12,11km.

GUERRARA OASIS: IMAGE 2

WEST VIEW
















This image shows the water sources of the Guerrara Oasis facing west.
Co-ordinates: 4°40'7.51"E, 32°46'41.86"N, width of image: 4,14km.

GUERRARA OASIS: IMAGE 3

NORTH VIEW
















Big fields in the Guerrara Oasis facing north.
Co-ordinates: 4°40'7.51"E, 32°46'41.86"N, width of image: 3,59km

GUERRARA OASIS: IMAGE 4

EAST VIEW















in the Guerrara Oasis facing east.
Co-ordinates: 4°40'7.51"E, 32°46'41.86"N, width of image: 4,23km



F. KUFRA OASIS, LIBYA

The Kufra Oasis is located in the south east of Libya. In the 1970ies several big irrigation projects made intensive agriculrure possible. For the last 30 years the oasis was irrigated with fossile ground water. Today the ground water level is about 60m lowered. There are no data about how long the Kufra will be supplied with water. But scientist expect that this Oasis will dry out in only a few years

KUFRA OASIS: IMAGE 1

NORTH VIEW
















Overview of the Kufra Oasis in Libya facing north.
Co-ordinates: 23°19'10.79"E, 24°8'49.35"N, width of image: 49,29km

KUFRA OASIS: IMAGE 2

SOUTH VIEW
















This image shows the big round fields and a part of the irrigation system facing south.
Co-ordinates: 23°19'10.79"E, 24°8'49.35"N, width of image: 4,15km.


KUFRA OASIS: IMAGE 3

NORTH VIEW
















This image shows big fields in the Kufra Oasis with irrigation system facing north.
Co-ordinates: 23°19'10.79"E, 24°8'49.35"N, width of image: 4,71km.

KUFRA OASIS: IMAGE 4

NORTH VIEW
















Square fields in the Kufra Oasis facing north.
Co-ordinates: 23°19'10.79"E, 24°8'49.35"N, width of image: 4,63km.





G. SAN PEDRO DE ATACAMA, CHILE

San Pedro de Atacama is a town in the Atacama Desert in Chile. It lies 2.443m high and has about 4900 mostly indigenous inhabitants. Because of its height the temperature can drop below zero degrees at night. The river Rio San Pedro supplies the town with water and drains away after it passed the town.

SAN PEDRO DE ATACAMA: IMAGE 1

NORTH VIEW
















Overview of San Pedro de Atacama in Chile facing north.
Co-ordinates: 68°12'6.71"W, 22°55'5.98"S, width of image: 10,22km

SAN PEDRO DE ATACAMA: IMAGE 2

NORTH VIEW

















This image shows a river that brings water to San Pedro de Atacama facing north.
Co-ordinates: 68°12'6.71"W, 22°55'5.98"S, width of image: 5,14km.

SAN PEDRO DE ATACAMA: IMAGE 3

WEST VIEW

















Fiels and the river in San Pedro de Atacama facing west.
Co-ordinates: 68°12'6.71"W, 22°55'5.98"S, width of image: 500m.

SAN PEDRO DE ATACAMA: IMAGE 4

NORTH VIEW

















This Image shows small fields in San Pedro de Atacama facing north.
Co-ordinates: 68°12'6.71"W, 22°55'5.98"S, width of image: 520m.

H. EN GEDI OASIS, ISRAEL

En Gedi is an Oasis in the northern part of the desert Negev closed zo the Dead Sea in Israel. The oasis is administrated by a Kibbuz today that cultivate dates but finance itself manly with tourism and mineral water production. Because the sea level loweres En Gedi is endangered by huge collapses of vugs.

EN GEDI OASIS: IMAGE 1

NORTH VIEW

















This image shows an overview of the En Gedi Oasis in Israel facing north with the Mediterranean visible on the left side.
Co-ordinates: 35°23'30.99"E, 31°27'29.24"N, width of image: 72,65km.

EN GEDI OASIS: IMAGE 2

NORTH WEST VIEW



















This image shows a smaller overview of the Dhakla Oasis facing north west.
Co-ordinates: 35°23'30.99"E, 31°27'29.24"N, width of image: 1,69km.

EN GEDI OASIS: IMAGE 3

SOUTH WEST VIEW

















The village in the En Gedi Oasis facing south west.
Co-ordinates: 35°23'30.99"E, 31°27'29.24"N, width of image: 490km.

EN GEDI OASIS: IMAGE 4

NORTH WEST VIEW






















This image shows some of the fields in the En Gedi Oasis facing north west.
Co-ordinates: 35°23'30.99"E, 31°27'29.24"N, width of image: 600m.



I. TURPAN OASIS, CHINA

The Oasis Turpan lies on the Silk Road in west China. It is located in the Turfan Depression which is up to 154,5m under the sea level. The osis is home to more than 250.000 people. Canals supply Turpan with melt water from the Tienschan Mountans. Agricultural products are grapes and melons.

TURPAN OASIS: IMAGE 1

NORTH VIEW




















This image shows an overview of the Turpan Oasis in China facing north.
Co-ordinates: 89°6'3.08"E, 42°51'35.33"N, width of image: 112,37km

TURPAN OASIS: IMAGE 2

NORTH EAST VIEW


















This image shows a village in the Turpan Oasis surrounded by fields facing north east. It also shows an incoming river.
Co-ordinates: 89°6'3.08"E, 42°51'35.33"N, width of image: 7,61km.


TURPAN OASIS: IMAGE 3

NORTH VIEW



















This image shows fields between rocks in the Turpan Oasis facing north.
Co-ordinates: 89°6'3.08"E, 42°51'35.33"N, width of image: 4,34km.

TURPAN OASIS: IMAGE 4

NORTH VIEW

















This image shows huge salinisation in the Turpan Oasis facing north.
Co-ordinates: 89°6'3.08"E, 42°51'35.33"N, width of image: 25,26km.


J. YZAD OASIS, IRAN

The Yzad Osis in Trand is one of the biggest Oases in the world with more that 500.000 inhabitants. Yzad is a cultivated osais since 3000 B.C. It is located 1203m above sea level and has therefore cold winters. The whole region is known for its textile products like silk and other industries.


YZAD OASIS: IMAGE 1

NORTH WEST VIEW




















This image shows an overview of the Yzad Oasis in Iran facing north west.
Co-ordinates: 54°21'38.45"E, 31°53'47.80"N, width of image:61,38km.

YZAD OASIS: IMAGE 2

SOUTH EAST VIEW

















This image shows some fields surrounded by salinisated areas in the Yzad Oasis facing south east.
Co-ordinates: 54°21'38.45"E, 31°53'47.80"N, width of image: 16,59km.

YZAD OASIS: IMAGE 3

WEST VIEW




















This image shows a part of the irrigation system in the Yzad Oasis facing west.
Co-ordinates: 54°21'38.45"E, 31°53'47.80"N, width of image: 5,81km

YZAD OASIS: IMAGE 4

EAST VIEW

















This image shows a village surrounded by fields in the Yzad Oasis facing east.
Co-ordinates: 54°21'38.45"E, 31°53'47.80"N, width of image: 6,71km.



K. TAYMA OASIS, SAUDI ARABIA

The Tayma Osis in Saudi Arabia is one of the biggest and oldest oases in the world. It is located 830m above the sea level in a depression where the ground water is closed to the earth`s surface. Artificial irrigation made a the cultivation of 80.000 date palms possible

TAYMA OASIS: IMAGE 1

NORTH EAST VIEW


















This image shows an overview of the Tayma Oasis in Saudi Arabia facing north east.
Co-ordinates: 38°33'36.82"E, 27°37'37.95"N, width of image: 24,13km

TAYMA OASIS: IMAGE 2

NORTH VIEW




















This image shows a village in the Tayma Oasis facing north.
Co-ordinates: 38°33'36.82"E, 27°37'37.95"N, width of image: 3,13km.

TAYMA OASIS: IMAGE 3

NORTH VIEW




















This image shows huge round fields in the Tayma Oasis facing north.
Co-ordinates: 38°33'36.82"E, 27°37'37.95"N, width of image: 4,31km.

TAYMA OASIS: IMAGE 4

EAST VIEW

















This image shows some fields that are surrounded by salinisated areas facing east.
Co-ordinates: 38°33'36.82"E, 27°37'37.95"N, width of image: 1,39km

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