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How are new islands called chars formed in the Ganges delta?

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Physical map showing the Brahmaputra and Ganges river basins and their drainage networks across northern India, Bangladesh, Nepal, Bhutan, Tibet (China), and Myanmar. The map uses color shading to indicate elevation, from the high Himalayas in brown and white to lowland plains in green, and marks major rivers, tributaries, glaciers, dams, irrigated areas, and regions subject to flooding. An inset locator map highlights the region within South Asia. — Ganges River The Brahmaputra and Ganges river basins and their drainage network.

In the Ganges delta, new islands and lands known as chars are formed through the rapid and continuous deposition of sediment carried by the river system.1

The Ganges-Brahmaputra river system carries the world's highest combined suspended sediment load, totaling approximately 1.84 billion tons per year. As these active rivers shift their courses, they undergo constant cycles of erosion and deposition. In the delta region, particularly toward the east, this process leads to the emergence of new landforms. These chars are often temporary, appearing and disappearing seasonally as the rivers change their paths, though they serve as valuable cultivable areas for the local economy.12