Answer:
There
are basically four drainage patterns of rivers
(i) Dendritic Pattern This is the most common pattern followed by
rivers like the Ganga. This develops where the river channel follows the slope
of the terrain. The stream with its tributaries resembles the branches of a tree.
(ii) Trellis Pattern Short tributaries meet long
trunk streams at near right angles. They are formed on sedimentary rocks of
different resistance to erosion. An example is the Narmada river.
(iii) Rectangular Pattern Straight tributaries meet
straight trunk streams with bends at almost right angles. These are formed on
faulted or fractured bedrock.
(iv) Radial Pattern The streams flow outward from a
well defined central point like a volcano or other round uplift of land.
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