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Write difference between a delta and estuaries. |
| Answer» Delta\tIt is a triangular-shaped piece of land, formed at the mouth of a river, where it meets the sea.\tWith the continuous deposition of silt on its bed, a river goes on splitting itself into channels or distributaries. They carry river water into the sea.\tDelta shows an extension of land into sea. It is continuously growing seawards.\tThe sea is shallow. Tidal currents are not strong enough to remove deposits effectively.\tThe world’s largest and the fastest growing delta is the Ganga-Brahmaputra delta known as the Sunderban delta. Peninsular rivers like the Mahanadi, Godavari, Krishna and Kaveri also form big deltas.Estuary\tAn estuary is an inlet formed generally by the submergence of the mouth of a river.\tIt has a single mouth or channel. It has steep banks or slopes. Where an estuary is formed, sea is deep.\tStrong tidal waves carry away the little amount of sediments deposited by a river.\tEstuaries produce an indented coastline and provide sites of natural harbours. They create conditions for better navigation.\tThe mouths of rivers Narmada and Tapi present good examples of estuaries. | |