Middle flow gradually passes from the canyon into the river valley. The flow of the river slows down considerably, which leads to deposition of sediment and gravel, sandy and muddy shoals. Many of the larger rivers have intertwined backwater. Finally, in the lowlands the river enters the lower stream and flows through the wide flood plain. The course splits into branches and meanders, the river creates a flood plain (alluvial plain): a broad band of river sediment deposited on both sides of the river. In the lower course the river can reach width of several hundred meters, as in the case of the Danube.