Question

A river joined by its tributaries, at approximately right angles forms ______.

• A. trellis pattern.
• B. dendritic pattern.
• C. radial pattern.
• D. rectangular pattern.
• E. All the Above.

Answer 1

The correct option is E All the Above.

All the Above.

The streams within a drainage basin form certain drainage patterns such as dendritic, trellis, rectangular, and radial patterns. A combination of several patterns may also be found in the same drainage basin.

The dendritic pattern develops where the river channel follows the slope of the terrain. The mainstream with its tributaries resembles the branches of a tree hence the name dendritic.

A trellis pattern develops where a river is joined by its tributaries, at approximately right angles and where hard and soft rocks exist parallel to each other.

A rectangular drainage pattern develops on a strongly jointed rocky terrain.

The radial pattern develops when streams flow in different directions from a central peak or dome-like structure.