Consider the following pairs:No.Drainage PatternRiver 1.Radial Drainage Narmada2.Trellis Drainage Brahmaputra 3.Rectangular Drainage Chambal 4.Parallel drainage GodavariHow many pairs given above are correctly matched?

🔑 Key Points
→ Drainage refers to the flow of water through well-defined channels, and the network of such channels is called a drainage system.

🌳 Dendritic Drainage Pattern:
→ It is the most common form, resembling the branching pattern of tree roots.
→ Develops where the river follows the slope of the terrain.
→ Tributaries join larger streams at acute angles (less than 90°).
→ Example: The rivers of the northern plains; Indus, Ganga, and Brahmaputra.

➖ Parallel Drainage Pattern:
→ Develops in regions with parallel, elongated landforms and a pronounced slope.
→ Tributary streams stretch out in a parallel fashion following the surface slope.
→ Example: Rivers originating in the Western Ghats; Godavari, Kaveri, Krishna, and Tungabhadra.

🪵 Trellis Drainage Pattern:
→ Forms in folded topography with alternating hard and soft rocks.
→ Primary tributaries flow parallel to each other, and secondary tributaries join at right angles.
→ Example: Rivers in the upper part of the Himalayas; Indus, Ganga, and Brahmaputra.

🟩 Rectangular Drainage Pattern:
→ Found in regions that have undergone faulting on a strongly joined rocky terrain.
→ Tributary streams make sharp bends and enter the mainstream at high angles.
→ Example: Streams in the Vindhya mountain range; Chambal, Betwa, and Ken.

🔴 Radial Drainage Pattern:
→ Develops around a central elevated point, common to conically shaped features like volcanoes.
→ Rivers originate from a hill and flow in all directions.
→ Example: Rivers originating from the Amarkantak range; Narmada and Son (tributary of Ganga).