what are the sediments do rivers carry along their flow

Rivers carry different types of sediments along their flow, including silt, sand, clay, and gravel. These sediments are called alluvial deposits and are brought down from the mountains by the rivers. As the river slows down, larger and heavier particles like pebbles and sand are deposited first, while the lighter silt and clay only settle if the water is almost still. When a river bursts its banks after heavy rain, flood water spreads out across the floodplain and finer silt and clay are deposited, often making good farmland. Sediment transport is the movement of organic and inorganic particles by water, and in general, the greater the flow, the more sediment that will be conveyed. Sediment transport may include mineral matter, chemicals, pollutants, and organic material.