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86-634: The length of the Anyuy is 393 kilometres (244 mi). The area of its basin is 12,700 square kilometres (4,900 sq mi). The Manoma is a main tributary of the Anyuy. According to French Jesuit geographers travelling on the Ussuri and the Amur in 1709, the Dondon River ( Tondon , in contemporary accounts) formed the border between the lands populated by the people known as Yupi Tartars (which

172-606: A bipedal locomotion and freed hands, giving them a crucial advantage enabling them to live in both forested areas and on the open savanna at a time when Africa was drying up, with savanna encroaching on forested areas. This occurred 10 million to 5 million years ago. By 3 million years ago several australopithecine hominid species had developed throughout Southern , East , and Central Africa . They were tool users rather than tool manufacturers. The next major evolutionary step occurred around 2.3 million BCE, when primitive stone tools were used to scavenge

258-427: A hierarchical pattern . Other terms for a drainage basin are catchment area , catchment basin , drainage area , river basin , water basin , and impluvium . In North America, they are commonly called a watershed , though in other English-speaking places, "watershed" is used only in its original sense, that of the drainage divide line. A drainage basin's boundaries are determined by watershed delineation ,

344-438: A " Wet Sahara " phase, during which larger lakes and more rivers existed. Geographers historically divided the region into several distinct ethnographic sections based on each area's respective inhabitants. The concept has been criticised as a racist construction intended to separate North Africa or "European/White Africa" and "Black Africa" or "Africa noire". Critics from various countries have provided arguments supporting

430-482: A Bantu language with many Arabic , Persian and other Middle Eastern and South Asian loan words , developed as a lingua franca for trade between the different peoples in southeastern Africa. In the Kalahari Desert of Southern Africa, the distinct people known as Bushmen (also "San", closely related to, but distinct from " Hottentots ") have long been present. The San evince unique physical traits, and are

516-410: A Business June 2008 through May 2009) , PFI (Press Freedom Index 2009) Sub-Saharan Africa contains over 1,500 languages. With the exception of the extinct Sumerian (a language isolate ) of Mesopotamia , Afroasiatic has the oldest documented history of any language family in the world. Egyptian was recorded as early as 3200 BCE. The Semitic branch was recorded as early as 2900 BCE in

602-437: A common task in environmental engineering and science. In a closed drainage basin, or endorheic basin , rather than flowing to the ocean, water converges toward the interior of the basin, known as a sink , which may be a permanent lake, a dry lake , or a point where surface water is lost underground . Drainage basins are similar but not identical to hydrologic units , which are drainage areas delineated so as to nest into

688-556: A different regional breakdown, recognising all 55 member states on the continent—grouping them into five distinct and standard regions. The term serves as a grouping counterpart to North Africa , which is instead grouped with the definition of MENA (i.e. Middle East and North Africa) as it is part of the Arab world , and most North African states are likewise members of the Arab League . However, while they are also member states of

774-454: A drainage basin, and there are different ways to interpret that data. In the unlikely event that the gauges are many and evenly distributed over an area of uniform precipitation, using the arithmetic mean method will give good results. In the Thiessen polygon method, the drainage basin is divided into polygons with the rain gauge in the middle of each polygon assumed to be representative for

860-540: A drainage boundary is referred to as watershed delineation . Finding the area and extent of a drainage basin is an important step in many areas of science and engineering. Most of the water that discharges from the basin outlet originated as precipitation falling on the basin. A portion of the water that enters the groundwater system beneath the drainage basin may flow towards the outlet of another drainage basin because groundwater flow directions do not always match those of their overlying drainage network. Measurement of

946-602: A multi-level hierarchical drainage system . Hydrologic units are defined to allow multiple inlets, outlets, or sinks. In a strict sense, all drainage basins are hydrologic units but not all hydrologic units are drainage basins. About 48.71% of the world's land drains to the Atlantic Ocean . In North America , surface water drains to the Atlantic via the Saint Lawrence River and Great Lakes basins,

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1032-612: A spiritual religious guardian. This imperial cult or system of divine kings was spread to most of central Africa by rivals in kingship migrating and forming new states. Many new states received legitimacy by claiming descent from the Lunda dynasties. The Kingdom of Kongo existed from the Atlantic west to the Kwango river to the east. During the 15th century, the Bakongo farming community was united with its capital at M'banza-Kongo , under

1118-522: A wide variety of climate zones or biomes . South Africa and the Democratic Republic of the Congo in particular are considered megadiverse countries . It has a dry winter season and a wet summer season. According to paleontology , early hominid skull anatomy was similar to that of their close cousins, the great African forest apes , gorilla and chimpanzee . However, they had adopted

1204-418: Is an area of land in which all flowing surface water converges to a single point, such as a river mouth , or flows into another body of water , such as a lake or ocean . A basin is separated from adjacent basins by a perimeter, the drainage divide , made up of a succession of elevated features, such as ridges and hills . A basin may consist of smaller basins that merge at river confluences , forming

1290-700: Is located on the Swahili coast . Johannesburg is the largest city in South Africa . It is the provincial capital and largest city in Gauteng , which is the wealthiest province in South Africa. While Johannesburg is not one of South Africa's three capital cities , it is the seat of the Constitutional Court . The city is located in the mineral-rich Witwatersrand range of hills, and is

1376-482: Is one of the fastest-growing cities in the world, and also one of the most populous urban agglomerations . Lagos is a major financial centre in Africa; this megacity has the highest GDP, and also houses Apapa , one of the largest and busiest ports on the continent. Dar es Salaam is the former capital of, as well as the most populous city in, Tanzania ; it is a regionally important economic centre. It

1462-487: Is referred to as " watershed management ". In Brazil , the National Policy of Water Resources, regulated by Act n° 9.433 of 1997, establishes the drainage basin as the territorial division of Brazilian water management. When a river basin crosses at least one political border, either a border within a nation or an international boundary, it is identified as a transboundary river . Management of such basins becomes

1548-614: Is the Dead Sea . Drainage basins have been historically important for determining territorial boundaries, particularly in regions where trade by water has been important. For example, the English crown gave the Hudson's Bay Company a monopoly on the fur trade in the entire Hudson Bay basin, an area called Rupert's Land . Bioregional political organization today includes agreements of states (e.g., international treaties and, within

1634-687: Is the traditional Chinese name for the Nanai people and related groups), living on the Ussury and the Amur south of the Dondon, and the people whose name was transcribed into French as Ke tcheng , living on the Amur from the mouth of the Dondon downstream. The latter name may be a transcription of the reported self-name of the Nanais of the lower Amur, Hezhe nai or Hezheni which is also the modern Chinese name for

1720-663: Is thought that the camel was first brought to Egypt after the Persian Empire conquered Egypt in 525 BCE, although large herds did not become common enough in North Africa for camels to be the pack animal of choice for the trans-saharan trade. The Bantu expansion is a major migration movement that originated in West Central Africa (possibly around Cameroon) around 2500 BCE, reaching East and Central Africa by 1000 BCE and Southern Africa by

1806-713: The African Great Lakes , the interiors of Australia and the Arabian Peninsula , and parts in Mexico and the Andes . Some of these, such as the Great Basin, are not single drainage basins but collections of separate, adjacent closed basins. In endorheic bodies of water where evaporation is the primary means of water loss, the water is typically more saline than the oceans. An extreme example of this

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1892-594: The African countries and territories that are situated fully in that specified region, the term may also include polities that only have part of their territory located in that region, per the definition of the United Nations (UN). This is considered a non-standardised geographical region with the number of countries included varying from 46 to 48 depending on the organisation describing the region (e.g. UN , WHO , World Bank , etc.). The African Union (AU) uses

1978-659: The Bantu expansion . In Southern Africa, their speakers are the Khoikhoi and San (Bushmen), in Southeast Africa, the Sandawe and Hadza . The Niger–Congo family is the largest in the world in terms of the number of languages (1,436) it contains. The vast majority of languages of this family are tonal , such as Yoruba and Igbo . However, others such as Fulani , Wolof and Kiswahili are not. A major branch of

2064-777: The Dutch East India Company . For most of the 17th and 18th centuries, the slowly expanding settlement was a Dutch possession. In 1795, the Dutch colony was captured by the British during the French Revolutionary Wars . The British intended to use Cape Town as a major port on the route to Australia and India . It was later returned to the Dutch in 1803, but soon afterward the Dutch East India Company declared bankruptcy, and

2150-607: The Eastern Seaboard of the United States, the Canadian Maritimes , and most of Newfoundland and Labrador . Nearly all of South America east of the Andes also drains to the Atlantic, as does most of Western and Central Europe and the greatest portion of western Sub-Saharan Africa , as well as Western Sahara and part of Morocco . The two major mediterranean seas of the world also flow to

2236-726: The Ethiopian Empire , and the Geledi Sultanate , whose military dominance forced governors of the Omani empire north of the city of Lamu to pay tribute to the Somali Sultan Ahmed Yusuf . According to the theory of recent African origin of modern humans , the mainstream position held within the scientific community, all humans originate from either Southeast Africa or the Horn of Africa. During

2322-464: The H. erectus species. The fossil and genetic evidence shows Homo sapiens developed in Southern and East Africa by around 350,000 to 260,000 years ago and gradually migrated across the continent in waves. Between 50,000 and 60,000 years ago, their expansion out of Africa launched the colonisation of the planet by modern humans. By 10,000 BCE, Homo sapiens had spread to all corners of

2408-594: The Mali Empire , Songhai Empire , the Kanem Empire and the subsequent Bornu Empire . They built stone structures like in Tichit , but mainly constructed in adobe . The Great Mosque of Djenne is most reflective of Sahelian architecture and is the largest adobe building in the world. In the forest zone, several states and empires such as Bono State , Akwamu and others emerged. The Ashanti Empire arose in

2494-735: The Mississippi (3.22 million km ), and the Río de la Plata (3.17 million km ). The three rivers that drain the most water, from most to least, are the Amazon, Ganges , and Congo rivers. Endorheic basin are inland basins that do not drain to an ocean. Endorheic basins cover around 18% of the Earth's land. Some endorheic basins drain to an Endorheic lake or Inland sea . Many of these lakes are ephemeral or vary dramatically in size depending on climate and inflow. If water evaporates or infiltrates into

2580-809: The Nile River ), Southern , Central, and Eastern Europe , Turkey , and the coastal areas of Israel , Lebanon , and Syria . The Arctic Ocean drains most of Western Canada and Northern Canada east of the Continental Divide , northern Alaska and parts of North Dakota , South Dakota , Minnesota , and Montana in the United States, the north shore of the Scandinavian peninsula in Europe, central and northern Russia, and parts of Kazakhstan and Mongolia in Asia , which totals to about 17% of

2666-674: The Sabaeans , Parthians and Axumites for the wealthy Indo – Greco – Roman trade. In the Middle Ages several powerful Somali empires dominated the region's trade, including the Ajuran Sultanate , which excelled in hydraulic engineering and fortress building, the Sultanate of Adal , whose General Ahmed Gurey was the first African commander in history to use cannon warfare on the continent during Adal's conquest of

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2752-662: The Songhai , Zarma and Kanuri . The Old Nubian language is also a member of this family. Major languages of Africa by region, family and number of primary language speakers in millions: Sub-Saharan Africa has several large cities. Lagos is a city in the Nigerian state of Lagos . The city, with its adjoining conurbation , is the most populous in Nigeria , and the second-most populous in Africa after Cairo , Egypt . It

2838-775: The Walls of Benin , which is the largest man-made structure in the world. In the 18th century, the Oyo and the Aro confederacy were responsible for most of the slaves exported from modern-day Nigeria, selling them to European slave traders . Following the Napoleonic Wars , the British expanded their influence into the Nigerian interior. In 1885, British claims to a West African sphere of influence received international recognition, and in

2924-523: The groundwater . A drainage basin is an area of land where all flowing surface water converges to a single point, such as a river mouth, or flows into another body of water, such as a lake or ocean. Sub-Saharan Africa Sub-Saharan Africa or Subsahara is the area and regions of the continent of Africa that lie south of the Sahara . These include Central Africa , East Africa , Southern Africa , and West Africa . Geopolitically, in addition to

3010-601: The 14th and 15th centuries, large medieval Southeast African kingdoms and states emerged, such as the Buganda , Bunyoro and Karagwe kingdoms of Uganda and Tanzania. During the early 1960s, the Southeast African nations achieved independence from colonial rule. Settlements of Bantu -speaking peoples, who were iron -using agriculturists and herdsmen, were already present south of the Limpopo River by

3096-589: The 18th century in modern-day Ghana . The Kingdom of Nri , was established by the Igbo in the 11th century. Nri was famous for having a priest-king who wielded no military power. Nri was a rare African state which was a haven for freed slaves and outcasts who sought refuge in their territory. Other major states included the kingdoms of Ifẹ and Oyo in the western block of Nigeria which became prominent about 700–900 and 1400 respectively, and center of Yoruba culture. The Yoruba built massive mud walls around their cities,

3182-531: The 1950s and early 1960s, most sub-Saharan African nations achieved independence from colonial rule. According to the 2022 revision of the World Population Prospects , the population of sub-Saharan Africa was 1.1 billion in 2019. The current growth rate is 2.3%. The UN predicts for the region a population between 2 and 2.5 billion by 2050 with a population density of 80 per km compared to 170 for Western Europe, 140 for Asia and 30 for

3268-536: The 4th or 5th century displacing and absorbing the original Khoisan speakers. They slowly moved south, and the earliest ironworks in modern-day KwaZulu-Natal Province are believed to date from around 1050. The southernmost group was the Xhosa people , whose language incorporates certain linguistic traits from the earlier Khoisan inhabitants. They reached the Fish River in today's Eastern Cape Province . Monomotapa

3354-776: The Americas. Sub-Saharan African countries top the list of countries and territories by fertility rate with 40 of the highest 50, all with TFR greater than 4 in 2008. All are above the world average except South Africa and Seychelles . More than 40% of the population in sub-Saharan countries is younger than 15 years old, as well as in Sudan , with the exception of South Africa. GDP per Capita (PPP) (2016, 2017 (PPP, US$ )) , Life (Exp.) (Life Expectancy 2006) , Literacy (Male/Female 2006) , Trans (Transparency 2009) , HDI (Human Development Index) , EODBR (Ease of Doing Business Rank June 2008 through May 2009) , SAB ( Starting

3440-789: The Andes. The Indian Ocean 's drainage basin also comprises about 13% of Earth's land. It drains the eastern coast of Africa, the coasts of the Red Sea and the Persian Gulf , the Indian subcontinent , Burma, and most parts of Australia . The five largest river basins (by area), from largest to smallest, are those of the Amazon (7 million km ), the Congo (4 million km ), the Nile (3.4 million km ),

3526-425: The Arab League , the Comoros , Djibouti , Mauritania , and Somalia (and sometimes Sudan ) are all geographically considered to be part of sub-Saharan Africa. Overall, the UN Development Programme applies the "sub-Saharan" classification to 46 of Africa's 55 countries, excluding Djibouti, SADR , Somalia, and Sudan. Since around 3900 BCE , the Saharan and sub-Saharan regions of Africa have been separated by

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3612-447: The Atlantic. The Caribbean Sea and Gulf of Mexico basin includes most of the U.S. interior between the Appalachian and Rocky Mountains , a small part of the Canadian provinces of Alberta and Saskatchewan , eastern Central America , the islands of the Caribbean and the Gulf, and a small part of northern South America. The Mediterranean Sea basin, with the Black Sea , includes much of North Africa , east-central Africa (through

3698-412: The Dutch (now under French control) and the British found themselves at war again. The British captured the Dutch possession yet again at the Battle of Blaauwberg , commanded by Sir David Blair . The Zulu Kingdom was a Southern African tribal state in what is now KwaZulu-Natal in southeastern South Africa. The small kingdom gained world fame during and after their defeat in the Anglo-Zulu War . During

3784-467: The Horn of Africa (Ethiopia, Eritrea). The Chadic branch is distributed in Central and West Africa. Hausa , its most widely spoken language, serves as a lingua franca in West Africa (Niger, Ghana, Togo, Benin, Cameroon, and Chad). The several families lumped under the term Khoi-San include languages indigenous to Southern Africa and Tanzania , though some, such as the Khoi languages , appear to have moved to their current locations not long before

3870-441: The Horn of Africa and Sahel related to those in North Africa, who spoke languages belonging to the Afroasiatic family; Negroes in most of the rest of the subcontinent (hence, the toponym Black Africa for Africa south of the Sahara ), who spoke languages belonging to the Niger-Congo and Nilo-Saharan families; and Khoisan in Southern Africa , who spoke languages belonging to the Khoisan family. Sub-Saharan Africa has

3956-536: The Mediterranean. Growing from the proto-Aksumite Iron Age period ( c. 4th century BCE), it rose to prominence by the 1st century CE. The Aksumites constructed monolithic stelae to cover the graves of their kings, such as King Ezana's Stele . The later Zagwe dynasty , established in the 12th century, built churches out of solid rock. These rock-hewn structures include the Church of St. George at Lalibela . In ancient Somalia , city-states flourished such as Opone , Mosyllon and Malao that competed with

4042-473: The Nanais, Hezhe or Hezhen . In 1999, a significant portion of the Anyuy basin was incorporated into the creation of Anyuysky National Park , one of the major protected areas of the Russian Federation. This Khabarovsk Krai location article is a stub . You can help Misplaced Pages by expanding it . This article related to a river in the Russian Far East is a stub . You can help Misplaced Pages by expanding it . Drainage basin A drainage basin

4128-438: The Niger–Congo languages is Bantu , which covers a greater geographic area than the rest of the family. Bantu speakers represent the majority of inhabitants in southern, central and southeastern Africa, though San , Pygmy , and Nilotic groups, respectively, can also be found in those regions. Bantu-speakers can also be found in parts of Central Africa such as the Gabon , Equatorial Guinea and southern Cameroon . Swahili ,

4214-409: The Sahel (northern Mauritania, northern Mali, northern Niger). The Cushitic branch of Afroasiatic is centered in the Horn, and is also spoken in the Nile Valley and parts of the African Great Lakes region. Additionally, the Semitic branch of the family, in the form of Arabic , is widely spoken in the parts of Africa that are within the Arab world. South Semitic languages are also spoken in parts of

4300-413: The Southeast coast of Kenya and Tanzania encountered by these later Arab and Persian settlers have been variously identified with the trading settlements of Rhapta , Azania and Menouthias referenced in early Greek and Chinese writings from 50 CE to 500 CE. These early writings perhaps document the first wave of Bantu settlers to reach Southeast Africa during their migration. Between

4386-417: The US, interstate compacts ) or other political entities in a particular drainage basin to manage the body or bodies of water into which it drains. Examples of such interstate compacts are the Great Lakes Commission and the Tahoe Regional Planning Agency . In hydrology , the drainage basin is a logical unit of focus for studying the movement of water within the hydrological cycle . The process of finding

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4472-421: The application of animal husbandry towards carrying water, food, and supplies across the desert. Prior to the introduction of the camel , the use of oxen, mule, and horses for desert crossing was common, and trade routes followed chains of oases that were strung across the desert. The trans-saharan trade was in full motion by 500 BCE with Carthage being a major economic force for its establishment. It

4558-411: The art of making fire. They were the first hominids to leave Africa, going on to colonise the entire Old World , and perhaps later on giving rise to Homo floresiensis . Although some recent writers suggest that H. georgicus , a H. habilis descendant , was the first and most primitive hominid to ever live outside Africa, many scientists consider H. georgicus to be an early and primitive member of

4644-406: The basin, it can form tributaries that change the structure of the land. There are three different main types, which are affected by the rocks and ground underneath. Rock that is quick to erode forms dendritic patterns, and these are seen most often. The two other types of patterns that form are trellis patterns and rectangular patterns. Rain gauge data is used to measure total precipitation over

4730-476: The carcasses of animals killed by other predators, both for their meat and their marrow. In hunting, H. habilis was most likely not capable of competing with large predators and was more prey than hunter, although H. habilis likely did steal eggs from nests and may have been able to catch small game and weakened larger prey such as cubs and older animals. The tools were classed as Oldowan . Roughly 1.8 million years ago, Homo ergaster first appeared in

4816-430: The discharge of water from a basin may be made by a stream gauge located at the basin's outlet. Depending on the conditions of the drainage basin, as rainfall occurs some of it seeps directly into the ground. This water will either remain underground, slowly making its way downhill and eventually reaching the basin, or it will permeate deeper into the soil and consolidate into groundwater aquifers. As water flows through

4902-441: The drainage area is dependent on the soil type. Certain soil types such as sandy soils are very free-draining, and rainfall on sandy soil is likely to be absorbed by the ground. However, soils containing clay can be almost impermeable and therefore rainfall on clay soils will run off and contribute to flood volumes. After prolonged rainfall even free-draining soils can become saturated , meaning that any further rainfall will reach

4988-642: The drainage basin to the mouth, and may accumulate there, disturbing the natural mineral balance. This can cause eutrophication where plant growth is accelerated by the additional material. Because drainage basins are coherent entities in a hydrological sense, it has become common to manage water resources on the basis of individual basins. In the U.S. state of Minnesota , governmental entities that perform this function are called " watershed districts ". In New Zealand, they are called catchment boards. Comparable community groups based in Ontario, Canada, are called conservation authorities . In North America, this function

5074-410: The early centuries CE. The Djenné-Djenno city-state flourished from 250 BCE to 900 CE and was influential to the development of the Ghana Empire . The Nok culture of Nigeria (lasting from 1,500 BCE to 200 CE) is known from a type of terracotta figure. There were a number of medieval empires of the southern Sahara and the Sahel, based on trans-Saharan trade , including the Ghana Empire and

5160-526: The extremely harsh climate of the sparsely populated Sahara, forming an effective barrier that is interrupted only by the Nile in Sudan, though navigation on the Nile was blocked by the Sudd and the river's cataracts . There is also an evident genetic divide between North Africa and sub-Saharan Africa that dates back to the Neolithic . The Sahara pump theory explains how flora and fauna (including Homo sapiens ) left Africa to penetrate Eurasia and beyond. African pluvial periods are associated with

5246-507: The first millennium BCE. Trade and improved agricultural techniques supported more sophisticated societies, leading to the early civilisations of Sao , Kanem , Bornu , Shilluk , Baguirmi , and Wadai . Following the Bantu Migration into Central Africa, during the 14th century, the Luba Kingdom in southeast Congo came about under a king whose political authority derived from religious, spiritual legitimacy. The kingdom controlled agriculture and regional trade of salt and iron from

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5332-534: The first millennium CE, Nilotic and Bantu -speaking peoples moved into the region , and the latter now account for three-quarters of Kenya's population. On the coastal section of Southeast Africa, a mixed Bantu community developed through contact with Muslim Arab and Persian traders, leading to the development of the mixed Arab, Persian and African Swahili City States . The Swahili culture that emerged from these exchanges evinces many Arab and Islamic influences not seen in traditional Bantu culture, as do

5418-441: The following year the Royal Niger Company was chartered under the leadership of Sir George Goldie . In 1900, the company's territory came under the control of the British government, which moved to consolidate its hold over the area of modern Nigeria. On 1 January 1901, Nigeria became a British protectorate as part of the British Empire , the foremost world power at the time. Nigeria was granted its independence in 1960 during

5504-444: The forebears of the Habesha . In northern Somalia was Barbara or the Bilad al-Barbar ("Land of the Berbers "), which was inhabited by the Eastern Baribah or Barbaroi , as the ancestors of the Somalis were referred to by medieval Arab and ancient Greek geographers, respectively. In the 19th and 20th centuries, the populations south of the Sahara were divided into three broad ancestral groups: Hamites and Semites in

5590-418: The form of the Akkadian language of Mesopotamia ( Assyria and Babylonia ) and circa 2500 BCE in the form of the Eblaite language of northeastern Syria . The distribution of the Afroasiatic languages within Africa is principally concentrated in North Africa and the Horn of Africa. Languages belonging to the family's Berber branch are mainly spoken in the north, with its speech area extending into

5676-451: The fossil record in Africa. From Homo ergaster , Homo erectus (upright man) evolved 1.5 million years ago. Some of the earlier representatives of this species were small-brained and used primitive stone tools , much like H. habilis . The brain later grew in size, and H. erectus eventually developed a more complex stone tool technology called the Acheulean . Potentially the first hominid to engage in hunting, H. erectus mastered

5762-435: The ground and along rivers it can pick up nutrients , sediment , and pollutants . With the water, they are transported towards the outlet of the basin, and can affect the ecological processes along the way as well as in the receiving water body . Modern use of artificial fertilizers , containing nitrogen (as nitrates ), phosphorus , and potassium , has affected the mouths of drainage basins. The minerals are carried by

5848-422: The ground at its terminus, the area can go by several names, such playa, salt flat, dry lake , or alkali sink . The largest endorheic basins are in Central Asia , including the Caspian Sea , the Aral Sea , and numerous smaller lakes. Other endorheic regions include the Great Basin in the United States, much of the Sahara Desert , the drainage basin of the Okavango River ( Kalahari Basin ), highlands near

5934-419: The indigenous people of southern Africa. Pygmies are the pre-Bantu indigenous peoples of Central Africa. The Nilo-Saharan languages are concentrated in the upper parts of the Chari and Nile rivers of Central Africa and Southeast Africa. They are principally spoken by Nilotic peoples and are also spoken in Sudan among the Fur , Masalit , Nubian and Zaghawa peoples and in West and Central Africa among

6020-457: The interconnectedness of continental Africa, pointing to historical and cultural connections, as well as trade between North, West, and East Africa . Commentators in Arabic in the medieval period used the general term bilâd as-sûdân ("Land of the Blacks") for the vast Sudan region (an expression denoting Central and West Africa ), or sometimes extending from the coast of West Africa to Western Sudan . Its equivalent in Southeast Africa

6106-460: The king title, Manikongo . Other significant states and peoples included the Kuba Kingdom , producers of the famous raffia cloth, the Eastern Lunda , Bemba , Burundi , Rwanda , and the Kingdom of Ndongo . Nubia , covered by present-day northern Sudan and southern Egypt , was referred to as " Aethiopia " ("land of the burnt face") by the Greeks . Nubia in her greatest phase is considered sub-Saharan Africa's oldest urban civilisation. Nubia

6192-525: The many Afro-Arab members of the Bantu Swahili people . With its original speech community centered on the coastal parts of Tanzania (particularly Zanzibar ) and Kenya  – a seaboard referred to as the Swahili Coast  – the Bantu Swahili language contains many Arabic loan-words as a consequence of these interactions. The earliest Bantu inhabitants of

6278-566: The most famous being Sungbo's Eredo . Another prominent kingdom in southwestern Nigeria was the Kingdom of Benin , whose power lasted between the 15th and 19th century. Their dominance reached as far as the well-known city of Eko which was named Lagos by the Portuguese traders and other early European settlers. The Edo -speaking people of Benin are known for their famous bronze casting and rich coral, wealth, ancient science and technology and

6364-720: The north and copper from the Zambian/Congo copper belt. Rival kingship factions which split from the Luba Kingdom later moved among the Lunda people, marrying into its elite and laying the foundation of the Lunda Empire in the 16th century. The ruling dynasty centralised authority among the Lunda under the Mwata Yamyo or Mwaant Yaav. The Mwata Yamyo's legitimacy, like that of the Luba king, came from being viewed as

6450-699: The period of decoloniszation . Archeological finds in Central Africa provide evidence of human settlement that may date back over 10,000 years. According to Zangato and Holl, there is evidence of iron-smelting in the Central African Republic and Cameroon that may date back to 3,000 to 2,500 BCE. Extensive walled sites and settlements have recently been found in Zilum , Chad. The area is located approximately 60 km (37 mi) southwest of Lake Chad, and has been radiocarbon dated to

6536-418: The rainfall on the area of land included in its polygon. These polygons are made by drawing lines between gauges, then making perpendicular bisectors of those lines form the polygons. The isohyetal method involves contours of equal precipitation are drawn over the gauges on a map. Calculating the area between these curves and adding up the volume of water is time-consuming. Isochrone maps can be used to show

6622-631: The responsibility of the countries sharing it. Nile Basin Initiative , OMVS for Senegal River , Mekong River Commission are a few examples of arrangements involving management of shared river basins. Management of shared drainage basins is also seen as a way to build lasting peaceful relationships among countries. The catchment is the most significant factor determining the amount or likelihood of flooding . Catchment factors are: topography , shape, size, soil type, and land use (paved or roofed areas). Catchment topography and shape determine

6708-461: The river rather than being absorbed by the ground. If the surface is impermeable the precipitation will create surface run-off which will lead to higher risk of flooding; if the ground is permeable, the precipitation will infiltrate the soil. Land use can contribute to the volume of water reaching the river, in a similar way to clay soils. For example, rainfall on roofs, pavements , and roads will be collected by rivers with almost no absorption into

6794-418: The speed with which the runoff reaches a river. A long thin catchment will take longer to drain than a circular catchment. Size will help determine the amount of water reaching the river, as the larger the catchment the greater the potential for flooding. It is also determined on the basis of length and width of the drainage basin. Soil type will help determine how much water reaches the river. The runoff from

6880-415: The time taken for rain to reach the river, while catchment size, soil type, and development determine the amount of water to reach the river. Generally, topography plays a big part in how fast runoff will reach a river. Rain that falls in steep mountainous areas will reach the primary river in the drainage basin faster than flat or lightly sloping areas (e.g., > 1% gradient). Shape will contribute to

6966-477: The time taken for runoff water within a drainage basin to reach a lake, reservoir or outlet, assuming constant and uniform effective rainfall. Drainage basins are the principal hydrologic unit considered in fluvial geomorphology . A drainage basin is the source for water and sediment that moves from higher elevation through the river system to lower elevations as they reshape the channel forms. Drainage basins are important in ecology . As water flows over

7052-789: The world's land. Just over 13% of the land in the world drains to the Pacific Ocean . Its basin includes much of China, eastern and southeastern Russia, Japan, the Korean Peninsula , most of Indochina, Indonesia and Malaysia, the Philippines, all of the Pacific Islands , the northeast coast of Australia , and Canada and the United States west of the Continental Divide (including most of Alaska), as well as western Central America and South America west of

7138-626: The world. This dispersal of the human species is suggested by linguistic, cultural and genetic evidence. During the 11th millennium BP , pottery was independently invented in West Africa, with the earliest pottery there dating to about 9,400 BC from central Mali. It spread throughout the Sahel and southern Sahara . After the Sahara became a desert, it did not present a totally impenetrable barrier for travelers between north and south because of

7224-695: Was Zanj ("Country of the Blacks"), which was situated in the vicinity of the Great Lakes region. The geographers drew an explicit ethnographic distinction between the Sudan region and its analogue Zanj, from the area to their extreme east on the Red Sea coast in the Horn of Africa . In modern-day Ethiopia and Eritrea was Al-Habash or Abyssinia, which was inhabited by the Habash or Abyssinians, who were

7310-475: Was a major source of gold for the ancient world. Nubians built famous structures and numerous pyramids. Sudan, the site of ancient Nubia, has more pyramids than anywhere else in the world. The Axumite Empire spanned the southern Sahara, south Arabia and the Sahel along the western shore of the Red Sea . Located in northern Ethiopia and Eritrea , Aksum was deeply involved in the trade network between India and

7396-536: Was a medieval kingdom (c. 1250–1629), which existed between the Zambezi and Limpopo rivers of Southern Africa in the territory of modern-day Zimbabwe and Mozambique . Its old capital was located at Great Zimbabwe . In 1487, Bartolomeu Dias became the first European to reach the southernmost tip of Africa. In 1652, a victualling station was established at the Cape of Good Hope by Jan van Riebeeck on behalf of

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