Q5.There is no formation of deltas by rivers of the Western Ghats. Why?

The rivers originating from the Western Ghats and flowing westwards do not form deltas due to specific geographical and hydrological characteristics.

Reasons for Absence of Deltas

• Steep Gradient and High Velocity: The steep western slopes of the Western Ghats result in rivers flowing at high velocity, which prevents significant sediment deposition.
• Short River Course: These west-flowing rivers are short in length, limiting the time and distance available for sediment accumulation.
• Hard Rock Terrain: The Deccan Trap's hard rock geology reduces the amount of erosional sediment carried by these rivers.
• Direct Sediment Transport: The high velocity and short course ensure that any limited sediment is carried directly into the deep Arabian Sea.
• Submergent Coastline: The submergent nature of the west coast leads to the formation of estuaries (rias) at river mouths, rather than deltaic plains.

Therefore, the combined effect of steep gradients, short river lengths, hard rock terrain, and a submergent coastline collectively inhibits delta formation, favoring estuaries.