Question

Explain why there is a large number of deltas on the eastern coast of India while its western coast is without even single major delta.

Answer 1

1. Topography and Slope:
   • The eastern coast is relatively flat and wide, allowing rivers like the Godavari, Krishna, and Mahanadi to spread out and deposit sediments at their mouths, forming deltas.
   • In contrast, the western coast is narrow and steep, with rivers like the Narmada and Tapi flowing through rugged terrains. These rivers flow swiftly and cannot deposit large amounts of sediment, which prevents the formation of deltas.
2. River Characteristics:
   • Rivers on the eastern coast are longer, perennial, and carry large sediment loads. The gentle slope of the land helps these rivers deposit sediments at the mouth, forming extensive deltas.
   • On the western coast, the rivers are shorter and have steep gradients, leading to faster flow that does not allow the sediment to settle. Instead, the rivers often form estuaries.
3. Tidal Influence:
   • The eastern rivers are less influenced by strong tidal currents, allowing sediments to accumulate and form deltas.
   • The western coast experiences stronger tidal influence, especially in areas like the Arabian Sea, which washes away sediments, preventing the formation of deltas.