Erosional and depositional features of rivers pdf

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erosional and depositional features of rivers pdf

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In earth science , erosion is the action of surface processes such as water flow or wind that removes soil , rock , or dissolved material from one location on the Earth's crust , and then transports it to another location. Erosion is distinct from weathering which involves no movement. Agents of erosion include rainfall ; [4] bedrock wear in rivers ; coastal erosion by the sea and waves ; glacial plucking, abrasion , and scour; areal flooding; wind abrasion; groundwater processes; and mass movement processes in steep landscapes like landslides and debris flows. The rates at which such processes act control how fast a surface is eroded.

Erosion and Deposition: Action of Running Water and Groundwater

As the river makes its way to the middle course , it gains more water and therefore more energy, so material can be carried in suspension and is used to erode the river banks. Lateral erosion starts to widen the river. When a river flows over flatter land it develops large bends called meanders. Due to erosion on the outside of a bend and deposition on the inside, the shape of a meander will change over a period of time. Erosion narrows the neck of the land within the meander and as the process continues, the meanders move closer together.

Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. If you continue browsing the site, you agree to the use of cookies on this website. See our User Agreement and Privacy Policy. See our Privacy Policy and User Agreement for details. Published on Sep 5, The basic land-forms created by erosion and deposition in a stream channel. This topic is under the area of fluvial morphology.

Erosional & Depositional features of a River

In the previous articles, we were discussing various types of endogenic and exogenic processes. We have also seen that erosion and deposition are some of the exogenic processes. In this post, we are dealing with the geomorphic agents — running water and groundwater , which causes erosion and deposition. They form various erosional destructional and depositional constructional landforms. Even though we are considering the erosional and depositional activities and their landform creation, it should be kept in mind that they are always aided by weathering and mass movements.

The significant landforms resulting from fluvial erosion by streams include river valleys, waterfalls, pot holes, structural benches, river terraces, river meanders, ox-bow lakes and peneplians etc. The valley formed in the youthful stage of fluvial cycle of erosion and in the initial stage of valley development is V-shaped having steep valley side slope of convex element. The valley is very deep and narrow, both the valley sides meet together at the valley floor and thus water always touches the valley sides. Such type of V- shaped valleys are the result of accelerated rate of down-cutting vertical erosion or valley deepening. They are further transformed into very broad and shallow valleys having concave valley side slope of very gentle gradient during old stage. It is difficult to draw a line of distinction between these two types of valleys.


The more familiar land forms are due to the erosive action of gullies and rivers, and the horizontal erosion of the sea. Deposition of the eroded.


Landforms of erosional coasts

In the previous articles, we were discussing various types of endogenic and exogenic processes. We have also seen that erosion and deposition are some of the exogenic processes. In this post, we are dealing with the geomorphic agents — running water and groundwater , which causes erosion and deposition. They form various erosional destructional and depositional constructional landforms. Even though we are considering the erosional and depositional activities and their landform creation, it should be kept in mind that they are always aided by weathering and mass movements.

Fluvial Erosional Landforms: Meander, Oxbow Lake, Peneplain

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Erosion and Deposition: Action of Running Water and Groundwater

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  • There are two major types of coastal morphology: one is dominated by erosion and the other by deposition. Lukas M. - 24.05.2021 at 02:03
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