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The delta consists of the middle course of the Niger River, between the bifurcated Niger and its tributary the Bani, which from here run north towards the desert. The Niger is the longest river in West Africa. Towns such as the river-port of Mopti, Sévaré and Djenné, with its mud-brick Great Mosque lie in the 400 km-long region.
An unusual feature of the river is the Inner Niger Delta, which forms where its gradient suddenly decreases. [20] The result is a region of braided streams, marshes, and large lakes; the seasonal floods make the Delta extremely productive for both fishing and agriculture. [21] Boy bringing back his canoe on the Niger River (2022)
The effects of the dams on the flooding of the Inland Niger Delta downstream of Mopti are expected to be modest, [18] as the discharge of the Bani is only one third of that of the Niger: for the period 1952-2002 the average flow at Douna was 424 m 3 (15,000 cu ft)/s compared with 1,280 m 3 (45,000 cu ft)/s for the Niger at Koulikoro. [14]
Another example is the delta of the Tagus river in Portugal, although due to sedimentation this delta is now only very partially inverted, with the valley now mostly filled with sediment. It is still about 15 km (9.3 mi) wide and 25 km (15.5 mi) long, compared with the 2 km-wide (1.2 mi) exit into the sea, and forms a large lagoon with large ...
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The Niger River valley, which dominates the topography of Mali, drained by the Niger River and its tributaries. Along its course, the central southern region is the narrowest and is known as the Inner Delta or the Inundation Zone of the Niger, formed of 38,000 square kilometres (15,000 sq mi) of flood-plains, along a river length of 570 kilometres (350 mi); these form its wetlands of great ...
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