A meander is a bend in a winding manner or river, and it has a snake-like shape due to its back and forth course across its down-valley axis. It is formed because of deposition and erosion – the material is deposited on the inside as the force of water erodes the river bank on the outside. Meanders in the middle section have a high volume of water and it has more energy compared to the upper section.
The flow of water here has less friction, which means that it flows faster. Meanders in the lower section are larger and since the continuous erosion of materials makes the meander neck to narrow, this is where ox bow lakes and levees are usually formed.
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