Which river forms an inland drainage area in Africa?

The Niger and Sénégal river basins and the Lake Chad basin and their drainage networks Encyclopædia Britannica, Inc. The Chad basin constitutes the largest inland drainage area in Africa.

Why is Lake Chad called an inland drainage lake?

Answer. The chaid basin constitutes the largest inland drainage area in affrica. At it’s maximum extent the sea was more than 600 feet (180 metres) deep, occupied an area of approximately 154,400 square miles (4000,000 square km) and drained into the Atlantic ocean through the benue river system.

What is the drainage area of a river called?

A watershed, also called a drainage basin or catchment, is an area drained by a river and its tributaries.

Which is the world largest inland drainage basin?

The Amazon Basin, in northern South America, is the largest in the world. The Amazon River and all of its tributaries drain an area more than 7 million square kilometers (about 3 million square miles).

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Which river drains into Lake Chad?

Chari River, also called Shari, principal tributary feeding Lake Chad in north-central Africa. It flows through Chad and the Central African Republic and is formed by the Bamingui (its true headstream), the Gribingui, and the Ouham, which brings to it the greatest volume of water.

Are there crocodiles in Lake Chad?

Lake Chad itself holds 85 fish species. … There are many floating islands in the lake. It is home to a wide variety of wildlife, including elephants, hippopotamus, crocodile (all in decline), and large communities of migrating birds including wintering ducks, ruff (Philomachus pugnax) and other waterfowl and shore birds.

Who controls Lake Chad?

The LCBC controls the hydro-active regions in the Chad Basin, called the Conventional Basin. The initial Conventional Basin consisted of approximately 427,500 km² of the total area of the Chad basin in 1964.

What are the 4 types of drainage patterns?

Drainage patterns

  • Dendritic drainage pattern.
  • Parallel drainage pattern.
  • Trellis drainage pattern.
  • Rectangular drainage pattern.
  • Radial drainage pattern.
  • Centripetal drainage pattern.
  • Deranged drainage pattern.
  • Annular drainage pattern.

What are the 5 major drainage areas in North America?

The basins are the Atlantic Seaboard basin, the Gulf of Mexico basin, the Great Lakes-St. Lawrence basin, the Pacific basin, the Arctic basin, the Hudson Bay basin, and the Great Basin.

What is a subwatershed?

A subwatershed is the area of land that water flows over or through to drain into a larger body of water. Subwatersheds in the city of Cambridge are part of the larger Grand River watershed. … Includes information on stream flows, water quality, groundwater movement and other natural features.

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Which is the largest drainage system in the world?

Fueling the World’s Longest Rivers

Rank River system Drainage area in miles² (km²)
1 Nile 1,256,591 (3,254,555)
2 Amazon 2,702,715 (7,000,000)
3 Yangtze 694,984 (1,800,000)
4 Mississippi 1,150,584 (2,980,000)

What are the 5 major drainage areas?

Drainage basins are defined by topographical features, called drainage divides, which determine the direction the water flows. Canada has six major drainage basins: the Arctic, Pacific, Western Hudson Bay and Mississippi, South and East Hudson Bay, Great Lakes–St Lawrence and Atlantic.

What are the three largest watersheds in the world?

The five largest river basins (by area), from largest to smallest, are the basins of the Amazon (7M km2), the Congo (4M km2), the Nile (3.4M km2), the Mississippi (3.22M km2), and the Río de la Plata (3.17M km2). The three rivers that drain the most water, from most to least, are the Amazon, Ganga, and Congo rivers.

Why is Lake Chad not salty?

It is the largest lake in Central and West Africa and the fourth largest lake on the African continent. … Despite the high rates of evaporation, Lake Chad has low levels of salinity because the more saline waters sink and leave the lake through subterranean conduits in the north.

Why did Mega Lake Chad dry up?

The drying of Lake Mega-Chad reveals a story of dramatic climate change in the southern Sahara, with a rapid change from a giant lake to desert dunes and dust, due to changes in rainfall from the West African Monsoon.

What is the largest lake in Nigeria?

It is the largest natural lake in Imo State, Southeastern Nigeria; within the equatorial rainforest region of Niger Delta.

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Oguta Lake
Basin countries Nigeria
Max. depth 8 m (26 ft)
Ramsar Wetland
Designated 30 April 2008
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