River processes refer to the natural actions that shape river systems and their surrounding landscapes. These processes include erosion, transportation, and deposition. Erosion occurs when flowing water wears away rocks and soil, while transportation involves the movement of sediments downstream. Deposition happens when the river loses energy, causing sediments to settle and form new landforms. These processes are influenced by various factors, such as the river's gradient, flow velocity, and the type of materials in the riverbed. Understanding river processes is essential for managing water resources, preventing flooding, and maintaining ecosystems along rivers like the Amazon or Mississippi.