The middle course - Classification of the river
The middle course of the river occurs over the foothill belt where the velocity or water is comparatively less which moves a little slowly. However, the waters are still fast enough to transport sand, silt and mud in suspension, and to roll pebbles along its bed. In this part of the river course, the valley is broad with stable sides, so that the river cannot erode the land, as much as it does in the mountain course. Most of the transportation of silt is achieved by this part of the river.