Gujarat BoardEnglish MediumSTD 9Social ScienceDrainage System4 Marks
Question
Describe different drainage paterns.
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Answer
The drainage pattern of Indian rivers can be divided into four parts:
$(A)$ Dendritic Pattern:
When the arrangement of a river and its tributaries make a shape of the branches of a tree, it is called dendritic pattern, For example-Ganga.$(B)$ Trellis Pattern:
When streams starting from mountainous region meet one another due to the slopes they make a net-like shape. This pattern of river is called trellis pattern of river.
For example, many streams of Himalayan Mountains meet Himalayan rivers and form a trellis pattern.
$(C)$ Rectangular Pattern:
When the main river and its tributaries meet each other at right angles, they form a rectangular pattern.
Mostly, rivers flowing through rift valleys form such river rectangular river system. For example, Narmada.
$(D)$ Radial (Centrifugal) Pattern:
In this drainage pattern, the rivers flow outwards from one central hilly region.
Radial pattern is found in the river of Saurashtra.
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