Deltas form when rivers slow down near the sea and deposit silt and sediment. Over time, this builds up into fan-shaped land. Deltas like those of the Ganga and Godavari are very fertile because of nutrient-rich deposits, supporting dense agriculture.
Class 7 NCERT Social Science India and the World: Land and the People Chapter 1 Geographical Diversity of India
Class 7 Social Science Exploring Society: India and Beyond Part 1 Solution
Deltas are formed at river mouths where the river slows and deposits silt and sediment, creating a fan- or triangle-shaped landform. These deposits are rich in minerals, making the soil highly fertile. Rivers like Ganga, Godavari, Krishna and Mahanadi form vast deltas on India’s east coast. These deltas support intensive agriculture due to their nutrient-rich soil and ample water supply. They are also home to many species of birds and fish, making them ecologically and economically significant.
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