Lower course features of river:

Floodplain: A floodplain, or flood plain, is flat or nearly flat land adjacent to a stream or river that experiences occasional or periodic flooding. It includes the floodway, which consists of the stream channel and adjacent areas that carry flood flows, and the flood fringe, which are areas covered by the flood, but which do not experience a strong current.

Levee: is a natural or artificial slope or wall to prevent flooding of the land behind it. It is usually earthen and often parallel to the course of a river or the coast. The ability of a river to carry sediments varies very strongly with its speed. When a river floods over its banks, the water spreads out, slows down, and deposits its load of sediment. Over time, the river's banks are built up above the level of the rest of the floodplain. The resulting ridges are called natural levees.

Deferred Tributary: A tributary is a stream or river which flows into a mainstem (or parent) river. A tributary does not flow directly into a sea. Tributaries and the mainstem river serve to drain the surrounding drainage basin of its surface water and groundwater by leading the water out into an ocean or some other large body of water. A confluence is when two or more bodies of water meet together, usually referring to the action of tributaries.

Distubritary:An affluent is synonymous to the word 'tributary', being defined as a stream or river that simply flows into a larger one.A parallel to tributaries is the distributary, a river that branches off of and flows away from the main stream.

Middle Course features:

The river channel has become much wider and deeper as the channel has been eroded and the river has been fed by many tributaries upstream. Consequently, despite the more gentle gradient the velocity of flow may be as fast as in the uplands. As well as changes in the river channel, its surrounding valley has also become wider and flatter in cross-section with a more extensive floodplain. One of the most distinctive features of the river in the middle course is its increased sinuousity. Unlike the relatively straight channel of the upper course, in the middle course there are many meanders (bends) in the river.

Meanders: A meander in general is a bend in a sinuous watercourse, also known as an oxbow loop, or simply an oxbow. A meander is formed when the moving water in a river erodes the outer banks and widens its valley creating a meander.

Ox-bow lake: Oxbow lakes are created when growing meanders intersect each other and cut off a meander loop, leaving it without an active cutting stream. Over time, these oxbow lakes tend to dry out or fill in with sediment

Braided Stream: Braided streams occur in rivers with high slope and/or large sediment load. Braided channels are also typical of environments that dramatically decrease channel depth, and consequently channel velocity, such as river deltas, alluvial fans and peneplains.


River Cliff - a small cliff formed on the outside of a meander bend due to erosion in this high energy zone.

Slip off Slope - a small beach found on the inside of a meander bend where deposition has occured in the low energy zone.