Wednesday, July 24, 2013

Geography of Jordan

Jordan is situated geographically in Southwest Asia, south of Syria, west of Iraq, northwest of Saudi Arabia and east of Israel and the West Bank; politically, the area has also been referred to in the West as the Middle or Near East. The territory of Jordan now covers about 91,880 square kilometers. Between 1950 and the Six Day War in 1967, although not widely recognized, Jordan claimed and administered an additional 5,880 square kilometers encompassing the West Bank; in 1988 and with continuing Israeli occupation, King Hussein relinquished Jordan's claim to the West Bank in favor of the Palestinians.
Jordan is landlocked except at its southern extremity, where nearly twenty-six kilometers of shoreline along the Gulf of Aqaba provide access to the Red Sea. A great north-south geological rift, forming the depression of Lake Tiberias (Sea of Galilee), the Jordan Valley, and the Dead Sea, is the dominant topographical feature.
Except for small sections of the borders with Israel and Syria, Jordan's international boundaries do not follow well-defined natural features of the terrain. The country's boundaries were established by various international agreements, and, with the exception of the border with Israel, none was in dispute in early 1989.
Jordan's boundaries with Syria, Iraq, and Saudi Arabia do not have the special significance that the border with Israel does; these borders have not always hampered tribal nomads in their movements, yet for a few groups borders did separate them from traditional grazing areas and delimited by a series of agreements between the United Kingdom and the government of what eventually became Saudi Arabia) was first formally defined in the Hadda Agreement of 1925. In 1965 Jordan and Saudi Arabia concluded a bilateral agreement that realigned and delimited the boundary. The realignment resulted in some exchange of territory, and Jordan's coastline on the Gulf of Aqaba was lengthened by about eighteen kilometers. The new boundary enabled Jordan to expand its port facilities and established a zone in which the two parties agreed to share petroleum revenues equally if oil were discovered. The agreement also protected the pasturage and watering rights of nomadic tribes inside the exchanged territories.
The country consists mainly of a plateau between 700 and 1,200 meters high, divided into ridges by valleys and gorges, and a few mountainous areas. Fractures of the Earth's surface are evident in the great geological rift that extends southward from the Jordan Valley through the Gulf of Aqaba and the Red Sea, gradually disappearing south of the lake country of East Africa. Although an earthquake-prone region, as of early 1989 no severe shocks had been recorded for several centuries.
By far the greatest part of the East Bank is desert, displaying the land forms and other features associated with great aridity. Most of this land is part of the great Syrian (or North Arabian) Desert (see fig. 4). There are broad expanses of sand and dunes, particularly in the south and southeast, together with salt flats. Occasional jumbles of sandstone hills or low mountains support only meager and stunted vegetation that thrives for a short period after the scanty winter rains. These areas support little life and are the least populated regions of Jordan.
The drainage network is coarse and incised. In many areas the relief provides no eventual outlet to the sea, so that sedimentary deposits accumulate in basins where moisture evaporates or is absorbed in the ground. Toward the depression in the western part of the East Bank, the desert rises gradually into the Jordanian Highlands—a steppe country of high, deeply cut limestone plateaus with an average elevation of about 900 meters. Occasional summits in this region reach 1,200 meters in the northern part and exceed 1,700 meters in the southern part; the highest peak is Jabal Ramm at 1,754 meters (though the highest peak in all of Jordan is Jabal Umm al Dami at 1854 meters. It is located in a remote part of southern Jordan). These highlands are an area of long-settled villages. Until about the 1940s, persons living in these villages depended upon rain-fed agriculture for their livelihood.
The western edge of this plateau country forms an escarpment along the eastern side of the Jordan River-Dead Sea depression and its continuation south of the Dead Sea. Most of the wadis that provide drainage from the plateau country into the depression carry water only during the short season of winter rains. Sharply incised with deep, canyonlike walls, whether wet or dry the wadis can be formidable obstacles to travel.
The Jordan River is short, but from its mountain headwaters (approximately 160 kilometers north of the river's mouth at the Dead Sea) the riverbed drops from an elevation of about 3,000 meters above sea level to more than 400 meters below sea level. Before reaching Jordanian territory the river forms the Sea of Galilee, the surface of which is 212 meters below sea level. The Jordan River's principal tributary is the Yarmouk River. Near the junction of the two rivers, the Yarmouk forms the boundary between Israel on the northwest, Syria on the northeast, and Jordan on the south. The Az Zarqa River, the second main tributary of the Jordan River, rises and empties entirely within the East Bank.
A 380-kilometer-long rift valley runs from the Yarmouk River in the north to Al Aqaba in the south. The northern part, from the Yarmouk River to the Dead Sea, is commonly known as the Jordan Valley. It is divided into eastern and western parts by the Jordan River. Bordered by a steep escarpment on both the eastern and the western side, the valley reaches a maximum width of twenty-two kilometers at some points. The valley is properly known as the Al Ghawr (the depression, or valley, also seen as Al Ghor).
The rift valley on the southern side of the Dead Sea is known as the Southern Ghawr and the Wadi al Jayb (popularly known as the Wadi al Arabah). The Southern Ghawr runs from Wadi al Hammah, on the south side of the Dead Sea, to Ghawr Faya, about twenty-five kilometers south of the Dead Sea. Wadi al Jayb is 180 kilometers long, from the southern shore of the Dead Sea to Al Aqaba in the south. The valley floor varies in level. In the south, it reaches its lowest level at the Dead Sea (more than 400 meters below sea level), rising in the north to just above sea level. Evaporation from the sea is extreme due to year-round high temperatures. The water contains about 250 grams of dissolved salts per liter at the surface and reaches the saturation point at 110 meters.
The Dead Sea occupies the deepest depression on the land surface of the earth. The depth of the depression is accentuated by the surrounding mountains and highlands that rise to elevations of 800 to 1,200 meters above sea level. The sea's greatest depth is about 430 meters, and it thus reaches a point more than 825 meters below sea level. A drop in the level of the sea has caused the former Lisan Peninsula to become a land bridge dividing the sea into separate northern and southern basins.