Geography Mali is a landlocked country in the interior of West Africa with an area of 1,240,192 square kilometres, of which 20,002 km² is water. It is located in the Greater Sudan as well as the Sahel. Mali shares its 7243 kilometre land border with seven neighbouring countries. In the northeast and north with Algeria (1376 kilometers long), in the northwest with Mauritania (2237 km), in the east with Niger (821 km) and in the southeast with Burkina Faso (1000 km). Mali is also bordered by Senegal (419 km) to the west, Guinea (858 km) to the southwest, and Côte d'Ivoire (532 km) to the south. North of the Niger Arc lies the Sahara Desert, which covers two-thirds of the country.
Relief
The most common type of landscape in Mali is the plain. The monotonous, vast plains such as the Kaarta, the Gourma or the Gondo plains are only locally broken up by flat table mountains or dune formations. The south of the Affolé, the Mandingo Plateau, the Bandiagara Plateau or the Mahardates Plateau have subsoils of sandstone. They are diversely indented by erosion and reach altitudes between 300 and 700 meters above sea level. In some regions, the subsoil consists of the ancient rocks of the African Shield, which tends to be expressionless and wide valleys: In the west and east of the country, in the southwest of the Affolé, in the Bambouk, in the Adrar of the Ifoghas and in the foothills of the Tamboura stage. Dune landscapes, whether the dunes are of fossil or recent origin, cover much of the north and extend into the Kaarta in the south. Notable dune landscapes are found in the Hodh, the Erg of Niafunké, the Gourma, the Gondo plain, the Ergs of Azaouad, of Erigat, of Mreyyé or the Erg Chech. While the fossil dunes are mostly parallel, chaotic and very mobile dune fields are common in the Aklé Aouana. Stratified steps forming steep slopes hundreds of meters deep are generally characteristic for West Africa, for Mali the Bandiagara step, the Tamboura step or the Affolé step can be mentioned. The few uplands of Mali are dolerite formations that rise above the plateaus. These include the elevations of Soninke. The highest mountain in Mali is Hombori Tondo at 1153 m.
Geology and soils
Mali lies entirely on the Lower African part of the Gondwana Urcraton. It is dominated by basin and sill structure, with most of Mali lying in the Taoudenni Basin, which extends from the Niger inland delta to the middle Sahara. The sills surrounding the basin consist of uplifts of the crystalline Urcraton. It is frequently overlain by sandstone formed between the Paleozoic and Cenozoic eras by several phases of seawater inundation. Tertiary deposits occur less frequently. Since Mali, like the entire Sahel, belongs to the rim-tropical zone of excessive land formation, extensive hull surfaces interrupted by inselbergs are typical. Laterite crusts, which can be up to several meters thick, have formed widely on the surface of sediments. The youngest geological formations run parallel in a northeast-southwest direction. They are ancient dunes formed in the Late Pleistocene, up to 30 m high and stabilized by savanna vegetation.
As far as soils are concerned, tropical red earths are the most widespread. They occur on crystalline bedrock or old sedimentary layers and are relatively sterile. Where these soils have formed laterite crusts, sparse vegetation of Combretaceae thrives. In pediment areas, weathering material may accumulate and form suitable soils for agriculture. Fersiallites, reddish-brown lessivated soils on eolian sands, are also common and form layers of 2 to 3 meters. They contain little humus and are susceptible to soil degradation by humans. With appropriate fertilizer application, they are suitable for millet or cotton cultivation. The northern Sahel is dominated by subarid brown soils, which on the one hand absorb the infrequently falling precipitation well, but on the other hand are prone to erosion. This soil, which is often overgrown with grass, is of great importance for nomadic pasture farming. The desert regions are characterized by raw soils, which have been formed by physical weathering and hardly contain any organic matter. Along the rivers, especially in the floodplains and in the inland delta of the Niger, gley soils and vertisols occur. They have high fertility but carry the risk of salinization and crevice formation during drought. They are suitable for growing sorghum, rice, vegetables and other crops.
Waters
The Niger is the most important river of West Africa, it crosses Mali on a length of about 1700 km. Coming from Guinea, it enters the territory of Mali in the southwestern tip of the country and forms a large inland delta after Ségou. At Mopti it takes in its largest tributary, the Bani, and shortly thereafter splits into two arms, the Bara Issa and the Issa Ber. Here is an alluvial plain of about 100,000 km², covered by numerous shallow, seasonal lakes. Shortly before Diré the two arms join, at Timbuktu the course of the river turns towards the east and at Bourem towards the southeast.
The Senegal River is the second important river in the region. It is formed at Bafoulabé by the confluence of the Bafing and Bakoye rivers. On its way through the western part of Mali, the Senegal River still receives the water of Falémé, Kolimbiné and Karakoro.
The year-round lakes are located on both sides of the Niger and are called Niangay and Faguibine. The latter, with a surface area of 590 km², is the largest lake in the country during the rainy season. The numerous seasonal lakes fill with water in the rainy season, the most important of which are called Débo, Fati, Teli, Korientze, Tanda, Do, Garou and Aougoundou. Due to the decreasing rainfall since the severe droughts of the early 1980s and especially the construction of dams on the upper Niger, Niangay and Faguibine have recently been drying up regularly.
Fishing in the rivers and lakes forms an important economic sector. The swamps and wetlands that form along the Niger during the rainy season provide habitats for numerous bird species.
Climate
Mali's climate is primarily influenced by the country's location at the transition zone between the alternating humid savannah in the south and the fully arid Sahara in the north. The interaction between the northward-moving inner-tropical convergence zone in summer and the dry northeast trade winds (harmattan) in winter gives all regions of the country a distinctive division into dry and rainy seasons. The dry season falls in winter and the rainy season in summer. Average annual precipitation decreases from over 1200 millimeters in the south to less than 25 millimeters in the north. Large-scale agriculture is practiced almost exclusively in the south because of the climatically more favorable conditions. In the north, there are only small agricultural areas in the oases.
Not only the average annual rainfall, but also the number of rainy days per year, the length of the rainy season and the regularity of rainfall are much more favourable in the south than in the north. In Sikasso it rains on average on 97 days per year, in Bamako on 76 days, in Timbuktu on 29 and in Kidal on 18 days per year. While in Kidal well over half of the annual rainfall occurs in July and August, the south enjoys a rainy season that begins in May, peaks in August and subsides in October. The further north you go, the more the precipitation falls in the form of short, heavy and localized thundershowers. This further complicates farming, as crops often wither between downpours, forcing farmers to make several sowing attempts.
The average annual temperatures in Mali are between 27 °C and 30 °C. They are largely independent of the geographical latitude. However, the annual amplitudes are significantly higher in the north than in the south: in Gao or Timbuktu, the summers are hotter with average temperatures of up to 35 °C and the winters are colder with January temperatures around 20 °C. In Bamako, on the other hand, average temperatures range from 25 °C in winter to 32 °C in April. Extreme temperatures are reported from places on the edge of the Sahara: they are close to freezing on cold winter nights and close to 50 °C in the shade on summer days. Temperature amplitudes of 30 °C within one day are normal there.
The amount of rainfall in a year depends to a large extent on how far north the inner-tropical convergence zone moves and how uniform it is. If it is not steady but wavy or interrupted, less rain falls or the rainy season begins later. If there are several years in a row with unfavourable characteristics of the intra-tropical convergence zone, droughts occur. This phenomenon occurs at irregular intervals in the Sahel. Since the 1960s, however, droughts have become more frequent. A long-term decrease in precipitation can also be demonstrated for this period. This is explained by reduced evaporation in the interior tropics due to environmental degradation. In the future, some scientists expect that rainfall in Mali will continue to decrease and that vegetation zones will shift southward. In this case, the impact on agriculture and food security would be severe.
Climate diagrams of Sikasso, Bamako (southwest) and Timbuktu (northeast)
Climate diagram of Sikasso (1950-2000) | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | | | | Max. Temperature (°C) | 33,5 | 36,0 | 37,4 | 37,3 | 35,6 | 32,9 | 30,7 | 39,9 | 31,0 | 33,3 | 34,4 | 33,1 | Ø | 34,6 | | Min. temperature (°C) | 15,3 | 18,3 | 22,1 | 24,6 | 24,1 | 22,4 | 21,5 | 21,4 | 21,3 | 21,5 | 18,5 | 15,2 | Ø | 20,5 | | | Precipitation (mm) | 1,4 | 4,1 | 12,8 | 45,9 | 109,1 | 152,3 | 243,7 | 308,8 | 210,0 | 84,4 | 11,7 | 2,0 | | 1.186,2 | | | Sunshine hours (h/d) | 8,5 | 8,7 | 7,7 | 7,2 | 7,8 | 7,4 | 6,6 | 5,7 | 6,4 | 7,8 | 8,6 | 8,4 | Ø | 7,6 | | | Rainy days (d) | 0,2 | 0,6 | 2,3 | 5,4 | 9,9 | 12,7 | 17,0 | 20,0 | 14,5 | 9,0 | 1,4 | 0,2 | | 93,2 | | Temperature | | | | | | | | | | | | | | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | | Precipitation | 1,4 | 4,1 | 12,8 | 45,9 | 109,1 | 152,3 | 243,7 | 308,8 | 210,0 | 84,4 | 11,7 | 2,0 | | | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Source: World Meteorological Organization, Hong Kong Observatory (1961-1990). |
Climate diagram of Bamako (1950-2000) | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | | | | Max. Temperature (°C) | 33,4 | 36,4 | 38,5 | 39,6 | 38,5 | 35,3 | 32,1 | 31,1 | 32,2 | 34,6 | 35,3 | 33,4 | Ø | 35 | | Min. temperature (°C) | 17,0 | 19,9 | 22,9 | 25,2 | 25,4 | 23,6 | 22,2 | 21,8 | 21,6 | 21,3 | 18,4 | 16,8 | Ø | 21,3 | | | Precipitation (mm) | 0,6 | 0,7 | 2,1 | 19,7 | 54,1 | 132,1 | 224,1 | 290,2 | 195,9 | 66,1 | 5,2 | 0,5 | | 991,3 | | | Sunshine hours (h/d) | 8,9 | 9,0 | 8,6 | 7,7 | 7,8 | 7,8 | 7,0 | 7,0 | 7,4 | 8,2 | 9,0 | 8,7 | Ø | 8,1 | | | Rainy days (d) | 0,2 | 0,2 | 0,6 | 3,3 | 6,3 | 7,7 | 16,7 | 17,9 | 14,7 | 5,7 | 0,3 | 0,1 | | 73,7 | | Temperature | | | | | | | | | | | | | | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | | Precipitation | 0,6 | 0,7 | 2,1 | 19,7 | 54,1 | 132,1 | 224,1 | 290,2 | 195,9 | 66,1 | 5,2 | 0,5 | | | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Source: World Meteorological Organization, Hong Kong Observatory (1961-1990). |
Climate diagram of Timbuktu (1950-2000) | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | | | | Max. Temperature (°C) | 30,0 | 33,2 | 36,6 | 40,0 | 42,2 | 41,6 | 38,5 | 36,5 | 38,3 | 39,1 | 35,2 | 30,4 | Ø | 36,8 | | Min. temperature (°C) | 13,0 | 15,2 | 18,5 | 22,5 | 26,0 | 27,3 | 25,8 | 24,8 | 24,8 | 22,7 | 17,7 | 13,5 | Ø | 21 | | | Precipitation (mm) | 0,6 | 0,1 | 0,1 | 1,0 | 4,0 | 16,4 | 53,5 | 73,6 | 29,4 | 3,8 | 0,1 | 0,2 | | 182,8 | | | Sunshine hours (h/d) | 8,5 | 8,9 | 8,7 | 8,5 | 8,9 | 7,8 | 8,0 | 8,2 | 8,3 | 8,8 | 9,1 | 8,3 | Ø | 8,5 | | | Rainy days (d) | 0,1 | 0,1 | 0,1 | 0,6 | 0,9 | 3,2 | 6,6 | 8,1 | 4,7 | 0,8 | 0,0 | 0,1 | | 25,3 | | Temperature | | | | | | | | | | | | | | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | | Precipitation | 0,6 | 0,1 | 0,1 | 1,0 | 4,0 | 16,4 | 53,5 | 73,6 | 29,4 | 3,8 | 0,1 | 0,2 | | | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Source: World Meteorological Organization, Hong Kong Observatory (1961-1990). |
Cities
Mali is home to some of the oldest cities in West Africa. Djenné developed from the 9th century through immigration of Soninke from disintegrated Ghana into a trading centre that experienced its peak in the 13th century and whose architecture still serves as a model for the villages of the Niger inland delta. Timbuktu, located on the southern edge of the Sahara, emerged from the 12th century as one of the region's most important cities, benefiting from its location at the northernmost point of the Niger Arc. While these old cities show declining populations, Mali as a whole shows rapid urbanization, allowing the new urban centers to grow rapidly. In addition to generally high population growth, rural exodus due to deteriorating ecological conditions, drought, or political instability contributes to rapid urbanization. While 9% of Malians lived in cities in 1965, this figure is expected to rise to about 41% in 2015.
By far the largest city in the country is Bamako, which has grown from a population of 6500 in 1908 to over 1.8 million in 2009. The city is the governmental and administrative centre of the country and serves as a bridgehead abroad, especially for development aid. However, it has no cross-border significance. Other important cities are Sikasso (2009: 226,618 inhabitants), Ségou (133,501 inhabitants) and the centre of Malian cotton processing Koutiala (75,000 inhabitants in 1998). Due to the influx of drought refugees, Mopti (81,000 inhabitants in 1998, 120,786 in 2009) and Sévaré have grown rapidly. Northern Sahel cities such as Timbuktu (30,000 inhabitants in 2005, 54,629 in 2009) or Gao (86,353 in 2009) are affected by out-migration, especially of young people.
See also: List of cities in Mali
flora and fauna
The vegetation in Mali is the result of centuries of human intervention. Natural vegetation is now only present in narrowly defined areas. The cultivated landscape, which has been created through grazing, agriculture and slash-and-burn agriculture, can be divided into four zones, depending on the amount of rainfall. With few exceptions, the plants in these zones have in common that they sprout at the beginning of the rainy season and shed their foliage or let the above-ground part die in the dry months.
The area of dense to open dry forests in the southern part of the country is dominated by tree species such as kapok tree (Ceiba pentandra), shea tree (Vitellaria paradoxa), African baobab (Adansonia digitata) or ana tree (Faidherbia albida). All these trees are intensively used by humans. Combretum woody plants thrive on less favourable soil. Horst grasses such as Hyparrhenia, Pennisetum, Loudetia and Andropogon species form the grass layer. North of the dry forests, where annual rainfall is less than 600 mm, the Sahelian briar savanna spreads. Various acacia species, desert date (Balanites aegyptiaca) or Combretum glutinosum, and the grass species Cenchrus biflorus or Aristida mutabilis dominate. Eragrostis tremula often colonizes areas where millet has been cultivated. This savanna is the Tiger Bush; there, areas with and without vegetation alternate in a striped pattern.
The border between thorn tree savannah and northern Sahel lies at 250 to 100 mm annual precipitation. Acacia species, shrub species such as Leptadenia pyrotechnica or the important forage plants Maerua crassifolia or toothbrush tree (Salvadora persica) still thrive in humid lowlands of the northern Sahel. The Sahara begins where the annual precipitation falls below 100 mm. In these areas, Acacia species occur only in wadis. In favourable locations, horst grasses such as Aristida pungens, Aristida longiflora or Panicum turgidum thrive.
Species endemic to Mali are Maerua de waillyi from the caper family, Elatine fauquei from the Tännel family, Pteleopsis habeensis (winged seed family), Hibiscus pseudohirtus (mallow family), Acridocarpus monodii (mallow family), Gilletiodendron glandulosum (legume family), Brachystelmam edusanthernum (genus Brachystelma), Pandanus raynalii (screw tree family).
Due to overhunting by locals and other hunters, desertification of large areas with severe droughts, and ongoing cultivation and competition with grazing animals, larger wild animals in particular are much rarer in Mali than in many other African states. As in Mauritania, extinction rates for populations of mammals in Mali have historically been very high compared to other African states, despite the low population density.
In total, about 140 species of mammals are native to Mali. Numerous species of large mammals have become extinct, including the formerly common sable antelope and the Mendes antelope (which may still occur in the border area with Mauritania), or have been reduced to small remnant populations. The West African giraffe originally occurred over much of central Mali, but was reduced by intensive hunting to a remnant population in the border area with Niger and is now also considered extinct. About 350 elephants live in the Gourma region in the border area with northern Burkina Faso. The latter are the most northerly population of African elephants and show periodic migratory behaviour in the border area, with the area located in Mali accounting for the greater part of the range. The African Manatee, a species of manatee, is also found in Niger, the Niger Inland Delta, Lake Débo and Senegal. The endangered and internationally protected species occurs regularly, but the populations are declining due to hunting and the deterioration of water quality and should be specially protected in the future.
The chimpanzee is found only in the extreme southwest of the country in the border area with Guinea, where its presence was documented for the first time only in 1977. Their number was estimated at 500-1000 individuals in 1984, but in 1993 a figure of 1800 to 3500 was arrived at. The most important habitats are the forests interspersed with Gilletiodendron glandulosum of the legume family, which in the Gilletiodendron forest provide about 60 plant species edible to chimpanzees. The groups are larger there than in those associations living in the savannah. The most important protected area is also the Réserve faunique du Bafing, established in 1990. Other primates found in Mali are the hussar monkey, the western green monkey, the anubis baboon, as well as the Guinea baboon (only in the far west) and the Senegal galago. In the past, lions and cheetahs, among other predators, were found in Mali, but their populations continued to decline, so that today they are no longer present, as is the African wild dog, even in the protected areas. Smaller predators such as the pale fox, sand cat, hawk cat, some creeping cats and martens continue to occur in Mali. Other mammals include some species of smaller antelope, the maned goat, aardvark and hippopotamus, besides numerous small mammals live in the country.
According to BirdLife International, a total of 562 bird species have been recorded for Mali, 117 of which are waterbirds. 229 species are classified as migratory birds. Numerous bird species live mainly in the inland delta of the Niger, in this area also many migratory birds from Europe spend the winter. Worth mentioning is the Mali amaranth, which is occasionally listed in guidebooks as endemic to Mali, but also occurs in neighbouring countries. Mali's endangered birds include larger ground-dwelling birds such as the African ostrich, bustards such as the Arabian bustard and the Nubian bustard, and guinea fowl.
Among Mali's reptiles, there are over 170 species of lizards, including monitor lizards and thorn-tailed agamas, and over 150 species of snakes. These include vipers such as the puff adder, various sand rattle vipers and the desert horned viper, as well as venomous snakes such as several cobras and the boomslang, which is present in the south. The Northern Rock Python is also part of the herpetofauna of the country. The Niger and other rivers are also home to crocodiles, especially the Nile crocodile, as in most major rivers in Africa. Besides these species, 15 species of turtles have also been recorded for Mali.
Mali's rivers and lakes are inhabited by over 140 species of fish, including 18 species of catfish, 14 species of tetra, 9 cichlids (including the Nile tilapia, Sarotherodon galilaeus and Coptodon zillii) and 4 carp fish. Mali's largest fish is the plankton-feeding African bonecone.
Termites are important for the ecosystems of the Sahel, loosening the soil and forming humus. The burrows of the species Cubitermes fungifaber are particularly striking. The weaver bird species are dreaded pests in the rice fields. Migratory locusts are of even greater concern to the population. The desert locust, which has its breeding grounds in the Maghreb, can migrate in huge swarms across the Sahara into the Sahel in years with sufficient rainfall and destroy natural vegetation as well as crops.
The only national park in Mali is the Boucle du Baoulé National Park in the west of the country, about 200 km north of Bamako. It covers an area of 5430 km² and serves to protect hippos, giraffes, waterbucks, roan antelope, giant eland and lyre antelope as well as warthogs, plus a corresponding flora. However, its forests are just as endangered by agricultural and pastoral overuse as those of the adjacent Réserve de Fina to the south.
See also: List of endangered species in Mali