Plains that are formed by the deposition of alluvium by rivers are called alluvial plains. The plains are most suitable for economic activities in the following ways:
- Plains formed by rivers are intensively cultivated as they have fertile soils and abundant water supply.
- The flat land makes it easy to build roadways, railways and buildings.
- Rivers in the plains are navigable, which supports trade and transport.
- They support dense population and the growth of towns and industries.