Geography of Somalia

thumb|300px|Somalia map of Köppen climate classification.

Somalia is a country located in the Horn of Africa which officially consists of the intra-46th meridian east territory, the seven federal member states, namely Galmudug, Hirshabelle, Jubaland, South West, Puntland, and the municipality of Benadir. It is bordered by Ethiopia to the west, the Gulf of Aden to the north, the Somali Sea and Guardafui Channel to the east, and Kenya to the southwest. With a land area of 637,657 square kilometers, Somalia's terrain consists mainly of plateaus, plains and highlands. Its coastline is more than 3,333 kilometers in length, the longest of mainland Africa. It has been described as being roughly shaped "like a tilted number seven".

In the far north, the rugged east–west ranges of the Ogo Mountains lie at varying distances from the Gulf of Aden coast. Hot conditions prevail year-round, along with periodic monsoon winds and irregular rainfall. Geology suggests the presence of valuable mineral deposits.

Somalia is separated from Seychelles by the Somali Sea and is separated from Socotra by the Guardafui Channel.

Climate

Due to Somalia's proximity to the equator, there is not much seasonal variation in its climate. However, there are some very unpredictable rainfalls that occur sometimes. Hot conditions prevail year-round along with monsoon (periodic seasonal reversing wind accompanied by corresponding changes in precipitation) winds and irregular rainfall. Mean daily maximum temperatures range from , except at higher elevations and along the eastern seaboard, where the effects of a cold offshore current can be felt. In Mogadishu, for instance, average afternoon highs range from in April. Some of the highest mean annual temperatures in the world have been recorded in the country; Berbera on the northwestern coast has an afternoon high that averages more than from June through September. Nationally, mean daily minimums usually vary from about . The greatest range in climate occurs in northern Somalia, where temperatures sometimes surpass in July on the littoral plains and drop below the freezing point during December in the highlands.

|source 2 = Food and Agriculture Organization: Somalia Water and Land Management (percent sunshine)

Terrain, vegetation and drainage

thumb|Topography of Somalia

Physio-graphically, Somalia is a land of limited contrast. In the north, a maritime semidesert plain parallels the Gulf of Aden coast, varying in width from roughly twelve kilometers in the west to as little as two kilometers in the east. Scrub-covered, this plain, known as the Guban (scrub land), is crossed by broad, shallow watercourses that are beds of dry sand except in the rainy seasons. When the rains arrive, the vegetation, which is a combination of low bushes and grass clumps, is quickly renewed, and for a time the guban provides some grazing for nomad livestock. This coastal strip is part of the Ethiopian xeric grasslands and shrublands ecoregion.

Inland from the gulf coast, the plain rises to the precipitous northward-facing cliffs of the dissected highlands. These form the rugged Karkaar mountain ranges that extend from the northwestern border with Ethiopia eastward to the tip of the Horn of Africa, where they end in sheer cliffs at Caseyr. The general elevation along the crest of these mountains averages about 1,800 meters above sea level south of the port town of Berbera, and eastward from that area it continues at 1,800 to 2,100 meters almost to Caseyr. The country's highest point, Shimber Berris, which rises to 2,460 meters, is located near the town of Erigavo.

Southward the mountains descend, often in scarped ledges, to an elevated plateau devoid of perennial rivers. This region of broken mountain terrain, shallow plateau valleys, and usually dry watercourses is known to the Somalis as the Ogo.

In the Ogo's especially arid eastern part, the plateau—broken by several isolated mountain ranges—gradually slopes toward the Somali Sea and in central Somalia constitutes the Mudug Plain. A major feature of this eastern section is the long and broad Nugaal Valley, with its extensive network of intermittent seasonal watercourses. The Nugaal river enters the Somali Sea at Eyl. The eastern area's population consists mainly of pastoral nomads eking a living in a zone of low and erratic rainfall.

The western part of the Ogo plateau region is crossed by numerous shallow valleys and dry watercourses. Annual rainfall is greater than in the east, and there are flat areas of arable land that provide a home for dryland cultivators. Most important, the western area has permanent wells to which the predominantly nomadic population returns during the dry seasons. The western plateau slopes gently southward and merges imperceptibly into an area known as the Haud, a broad, undulating terrain that constitutes some of the best grazing lands for Somali nomads, despite the lack of appreciable rainfall more than half the year. Enhancing the value of the Haud are the natural depressions that during periods of rain become temporary lakes and ponds.

The Haud zone continues for more than sixty kilometers into Ethiopia, and the vast Somali Plateau, which lies between the northern Somali mountains and the highlands of southeast Ethiopia, extends south and eastward through Ethiopia into central and southwest Somalia. The portion of the Haud lying within Ethiopia was the subject of an agreement made during the colonial era. In 1948, under pressure from their World War II allies and to the dismay of the Somalis, the British "returned" the Haud (an important Somali grazing area that was presumably 'protected' by British treaties with the Somalis in 1884 and 1886) and the Ogaden to Ethiopia, based on an 1897 treaty in which the British ceded Somali territory to the Ethiopian Emperor Menelik in exchange for his help against plundering by Somali clans. Britain included the proviso that the Somali nomads would retain their autonomy, but Ethiopia immediately claimed sovereignty over them. This prompted an unsuccessful bid by Britain in 1956 to buy back the Somali lands it had turned over. As the Haud merges into the Mudug Plain in central Somalia, the aridity increases and the vegetation takes on a subdesert character. Farther southward the terrain gradually changes to semiarid woodlands and grasslands as the annual precipitation increases.

The region encompassing the Shabeelle and Jubba rivers is relatively well watered and constitutes the country's most arable zone. The lowland between the rivers supports rich pasturage. It features arid to subarid savanna, open woodland, and thickets that include frequently abundant underlying grasses. There are areas of grassland, and in the far southwest, near the Kenyan border, some dry evergreen forests are found.

Along the Somali Sea from Hobyo southwestward to near Mogadishu lies a stretch of dry coastal sand dunes, the Hobyo grasslands and shrublands ecoregion. This area is covered with scattered scrub and grass clumps where rainfall is sufficient although unpredictable. Much of this coast is thinly populated but overgrazing, particularly south of Mogadishu, has resulted in the destruction of the protective vegetation cover and the gradual movement of the once-stationary dunes inland. The original flora of this coast contains a number of endemic species and beginning in the early 1970s, efforts were made to stabilize these dunes by replanting. Endemic mammals are the silver dik-dik (Madoqua piacentinii), one of the world's smallest antelopes, and the Somali golden mole (Calcochloris tytonis). Other endemic species include two reptiles, a skink Haackgreerius miopus and a lizard Latastia cherchii and two birds, Ash's lark (Mirafra ashi) and the Obbia lark (Spizocorys obbiensis). The long-term political strife in Somalia has meant the coast is poorly studied and the state of the habitat unknown.

Other vegetation includes plants and grasses found in the swamps into which the Shabeelle River empties most of the year and in other large swamps in the course of the lower Jubba River. Swamps of East African mangroves are found at points along the coast, particularly from Kismaayo to near the Kenyan border. Uncontrolled exploitation appears to have caused some damage to forests in that area. Other mangroves are located near Mogadishu and at a number of places along the northeastern and northern coasts.

Data

thumb|The [[Guardafui Channel, between the tip of Somalia and Socotra island.]]

Location:

Horn of Africa

Geographic coordinates:

Continent:

Africa

Area:

total:

land:

water:

Area - comparative:

slightly smaller than the United States state of Texas

thumb|180px|Dulbiciid in [[Godaalo, Xudun District, tallest Somalia mountain outside karkaar range]]

Land boundaries:

total:

border countries:

Djibouti , Ethiopia , and Kenya for

Coastline:

Maritime claims:

Exclusive Economic Zone:

with

Climate:

principally desert; December to February - northeast monsoon, moderate temperatures in north and very hot in south; May to October - southwest monsoon, torrid in the north and hot in the south, irregular rainfall, hot and humid periods (tangambili) between monsoons

Terrain:

mostly flat to undulating plateau rising to hills in north

Elevation extremes:

lowest point:

Indian Ocean

highest point:

Shimbiris

Natural resources:

uranium and largely unexploited reserves of iron ore, tin, gypsum, bauxite, copper, salt, natural gas

Land use:

arable land: 1.64%

permanent crops: 0.04%

other: 98.32% (2005)

Irrigated land: (2003)

Natural hazards:

recurring droughts; frequent dust storms over eastern plains in summer; floods during rainy season

Man-made hazards:

desertification; deforestation; overgrazing; soil erosion; waste dumping; overfishing

International environment agreements:

party to: Biodiversity, Desertification, Endangered Species, Law of the Sea, Ozone Layer Protection

signed, but not ratified:

Marine Dumping, Nuclear Test Ban

Geography - note:

Strategic location on Horn of Africa along southern approaches to Bab el Mandeb and route through Red Sea and Suez Canal. The Provisional Administrative Line forms the de facto southern border between Somalia and Ethiopia.

Extreme points

This is a list of the extreme points of Somalia, the points that are farther north, south, east or west than any other location.

Northernmost point – Alula Lagoon, Bari region
Easternmost point – Ras Hafun, Bari region*
Westernmost point – the western section of the border with Kenya**
* This is also the easternmost point of the African continent
** Somalia does not have a westernmost point, the western section of the border being formed by the 41° longitude

References

Notes

General references

Hadden, Robert Lee. 2007. "The Geology of Somalia: A Selected Bibliography of Somalian Geology, Geography and Earth Science." Engineer Research and Development Laboratories, Topographic Engineering Center (now known as the Army Geospatial Center), United States Army Corps of Engineers, in Alexandria, VA. Includes data and citations on the geology, geography, water and transportation in Somalia.