write briefly about drainage system
Answers
The function of the field drainage system is to control the water table, whereas the function of the main drainage system is to collect, transport, and dispose of the water through an outfall or outlet. In some instances one makes an additional distinction between collector and main drainage systems.
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DRAINAGE:
It describes the river system of an area.
DRAINAGE BASIN:
The area drained by a single river .
Drainage system in India:
The drainage system is controlled by broad relief features of the subcontinent.the Indian rivers are divided into 2.
★Himalayan rivers
★Peninsular rivers
The Himalayan rivers:
*Indus ,*Ganga,*Brahmaputra.
The peninsular rivers
*Narmada,*Tapi,*Godavari,
*Mahanadi,*Krishna,*Kaveri.
DRAINAGE PATTERNS :
★Dendritic :
Develops where the river channel flows the slopes of the terrain.The stream with its tributaries, resembles the branches of the tree.
★Trellis:
A river joined by its tributaries,at approximately right angles, develops a trellis pattern.It develops where hard and soft rocks exist to each other.
★Rectangular:
It develops on a strongly joined rocky terrain.
★Radial:
Develops when streams flow in different directions from a central park or something like structure.