1.  explain all the drainage patterns?

Hi Student,

The following is the answer to your question.

Drainage pattern refers to the spatial arrangement and form of drainage systems corresponding to geometric shapes. These are dependent on rock types, geological structure and climatic conditions. The following are the prominent drainage patterns:

  • Dendritic- It resembles the shape of a tree and is the most common pattern on the earth’s surface. It develops in regions where the river channel follows the slope of the terrain.
  • Trellis- It is formed when the tributaries of a river join it at right angles to form numerous longitudinal streams. It develops in regions where hard and soft rocks exist parallel to each other.
  • Rectangular- It develops in regions having strongly jointed rocky terrain.  The tributaries are more widely spaced in this pattern compared to trellis pattern.  The angle of confluence is determined by faults and fractures among the rocks in this terrain.
  • Radial- It develops when streams diverge from a central higher point or dome towards all directions. Thus, it resembles a centrifugal pattern where the arrangement of streams is similar to spokes of a wheel.

Hopethis resolves your query.

Best Wishes

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