Why are meanders not formed in the upper course of a river ?
Answers
Meanders are formed only when silt is deposited.
So, meanders are only found in middle course, not upper course
Answer:
Meanders not formed in the upper course of a river because of the following reasons-
A meander is formed in the middle reaches of the river. Meandering is a typical river-stage landform where river erosion changes from vertical to horizontal erosion.
A typical river flow can be divided into upper, middle and lower streams. As you know, headwaters are near the headwaters of rivers and are mostly mountainous (for snowy rivers). The midstream of the river begins as it enters the plains. After that, the slope decreases sharply. Here, rivers carry eroded material while lateral erosion continues. Some of the topography and features typical of this part of the river course are meanders, crescent lakes, floodplains and embankments.
A meandering river system has several components such as −
1. Meander wavelength: the distance between two meanders from one vertex to another vertex.
2. Serpentine Amplitude: The height of the serpentine between the trough of the serpentine itself and the serpentine axis.
3. Meander Width: The area between two banks.
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