What are the various erosional features formed by a river? Explain with the help of 3 diagram.
Answers
Explanation:
Erosional Landforms due to Running Water
1. Valleys, Gorges, Canyon
As we discussed above, valleys are formed as a result of running water.
The rills which are formed by the overland flow of water later develop into gullies.
These gullies gradually deepen and widen to form valleys.
A gorge is a deep valley with very steep to straight sides.
A canyon is characterized by steep step-like side slopes and may be as deep as a gorge.
A gorge is almost equal in width at its top as well as bottom and is formed in hard rocks while a canyon is wider at its top than at its bottom and is formed in horizontal bedded sedimentary rocks.
Gorge and canyon2. Potholes, Plunge pools
Potholes are more or less circular depressions over the rocky beds of hills streams.
Once a small and shallow depression forms, pebbles and boulders get collected in those depressions and get rotated by flowing water. Consequently, the depressions grow in dimensions to form potholes.
Plunge pools are nothing but large, deep potholes commonly found at the foot of a waterfall.
They are formed because of the sheer impact of water and rotation of boulders.
Potholes - erosional landform due to running waterPlunge pool - erosional landform due to running water
3. Incised or Entrenched Meanders
They are very deep wide meanders (loop-like channels) found cut in hard rocks.
In the course of time, they deepen and widen to form gorges or canyons in hard rock.
The difference between a normal meander and an incised/entrenched meander is that the latter found on hard rocks.
entrenched meander - running water erosion4. River Terraces
They are surfaces marking old valley floor or flood plains.
They are basically the result of vertical erosion by the stream.
When the terraces are of the same elevation on either side of the river, they are called as paired terraces.
When the terraces are seen only on one side with none on the other or one at quite a different elevation on the other side, they are called as unpaired terraces.
river terraces - running water landfrom due to erosion
The various erosional features formed by a river are waterfalls and gorges. Meanders etc.
Explanation:
- A river makes a meander in its middle course as it gains water and has more energy to carry its material o farther distances as they are carried in suspension they can be sued to erode the banks.
- Similarly, the oxbow lakes are also formed by the erosion of the sidewall of the river that bent and deposited to inside and as the shaped f the meander changes the river keeps on moving and this leads to the formation of oxbow lakes which are in the firm of horseshoe shape.
- The waterfall is an area where the water flow drops to form a vertical series in the source of a stream or a river.
Learn more about the various erosional features formed by a river with the help of 3 diagram.
- brainly.in/question/15893733 answered by suryasandeep15.
