what are ravines of chambal
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The Chambal river badlands is a late Pleistocene-Holocene degradational landscape.
The Chambal is the largest of cratonic (the part of a continent that is stable and forms the central mass of the continent) rivers in Ganga-Yamuna drainage basin. From source to its confluence with the Yamuna it is about a 1000 km long. It flows over both the Deccan Basalts and Proterozoic Vindhyan strata and contributes significant amount of sediment to the foreland basin.
Rivers and their associated floodplains go through aggradational and degradational phases. In an aggradational phase the river is carrying a large sediment load and flooding results in deposition of this sediment in the flood affected areas. This periodic deposition builds up or aggrades the floodplain.
Conditions may change. For example during longer wet periods and increased rain intensity river discharge increases. Sediment is not deposited locally but is carried out of the system to the sea. In these conditions rivers incise or cut into their own deposits. The river channel becomes situated in a deep valley detached from its floodplain. Starved of sediment, the floodplain degrades as erosion along the main channel and smaller streams cuts gully and ravines forming badlands.
Pictorial representation of this process
The Chambal is the largest of cratonic (the part of a continent that is stable and forms the central mass of the continent) rivers in Ganga-Yamuna drainage basin. From source to its confluence with the Yamuna it is about a 1000 km long. It flows over both the Deccan Basalts and Proterozoic Vindhyan strata and contributes significant amount of sediment to the foreland basin.
Rivers and their associated floodplains go through aggradational and degradational phases. In an aggradational phase the river is carrying a large sediment load and flooding results in deposition of this sediment in the flood affected areas. This periodic deposition builds up or aggrades the floodplain.
Conditions may change. For example during longer wet periods and increased rain intensity river discharge increases. Sediment is not deposited locally but is carried out of the system to the sea. In these conditions rivers incise or cut into their own deposits. The river channel becomes situated in a deep valley detached from its floodplain. Starved of sediment, the floodplain degrades as erosion along the main channel and smaller streams cuts gully and ravines forming badlands.
Pictorial representation of this process
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