The upper Niger Basin and also the inside Niger Delta are component of the Niger flow Basin. The upper Niger container consists of various tributaries and also catchments and also the inner Niger Delta is subdivided in different regions with their very own characteristics.

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Basins and subbasins

The Niger river (4,180 km) is the longest flow in West Africa and the third longest on the afri continent. Indigenous its source in the highlands that Guinea, the river passes through Mali, Niger and Nigeria wherein it flows into the Gulf the Guinea in the Atlantic Ocean. The flow drains a catchment area of end 2 million km2 and also provides water to an ext than 100 million people. The Niger River container can it is in subdivided right into three hydrographic regions (ABN 2007):

The upper Niger, consisting of the headwaters in the highlands the Guinea and also the Bani flow headwaters in the low-altitude plateaus of southerly Mali and northern Côte d’Ivoire, and also further downstream the within Niger Delta in main Mali, whereby the Niger and Bani seasonally inundate the floodplains the the delta; The middle Niger i m sorry runs eastern of the within Niger Delta through Mali and Niger right into Nigeria; The reduced Niger, including the Bénoué River, the largest tributary the the Niger i beg your pardon originates in northern Cameroon, and the Niger Delta in southeastern Nigeria where the river flows into the Gulf that Guinea.

The top Niger Basin and also Inner Niger Delta

Inner Niger DeltaThe inner Niger Delta downstream the the upper Niger container encompasses the floodplains of the Niger and also a collection of lakes in the north. The level of the inundation zone ~ above the map reflects the maximum flooded area, based on IGN-maps native the 1950s (Zwarts et al. 2005, Zwarts & Hoekema 2013). This zones procedures 36,470 km2, including 5340 km2 the levees, dunes and other islands within the area. The area actually inundated varies considerably in between years (see flood dynamics).

The inside Niger Delta might be subdivided in various regions. The southerly delta includes the flooded parts south the the main lakes with the Niger and Diaka as main branches. Djenné (on the southerly edge) and Mopti space the key settlements. In this area, phibìc of Mopti, the ‘centre vide’ is situated, an elevated component of the delta which just inundates a the greatest floods. The lower delta comprises the central lakes (Lac Débo, Walado Débo and also Lac Korientzé) and surrounding floodplains. Youvarou and Akka room the main settlements. North of the lakes the character of the delta changes, through east-west running sand dunes interspersed v flooded areas. Key branches room the Niger and the Bara Issa. This part extends towards Tombouctou in the north.

In the northern part of the inside Niger Delta a collection of lakes fringes the west and east flank of the delta. The lakes on the west financial institution – consisting of Lac Faguibine - are associated to the floodplain and also filled v water most of the year, depending on the flood height in the delta. The water level in many of this lakes is managed to facilitate cultivation of the lakes. The lakes ~ above the east bank are only inundated in case of very high floods and also must be pertained to as temporary lakes.

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Administrative areas (on the level of cercles) because that the upper Niger Basin and Inner Niger Delta.