difference between Upper course and lower course of a river.
Answers
Answer:
Upper course river features include steep-sided V-shaped valleys, interlocking spurs, rapids, waterfalls and gorges. Middle course river features include wider, shallower valleys, meanders, and oxbow lakes. Lower course river features include wide flat-bottomed valleys, floodplains and deltas.
Answer:
The rivers characteristics change from the source to the mouth of the river (from the upper to lower course).
Upper course - The gradient is really steep but the velocity is slow moving because of the vast amount of friction. They start off as streams meaning very narrow and very shallow. Also, because of the low amount of water there isn't much discharge but very large rocks, making the bed load very rough.
Middle course - The gradient starts to level off so the velocity starts to increase because there is less amount of friction acting on the water. The river also widens because of erosion because of faster moving water, and it deepens because or river bed erosion and because it has more water and a larger discharge, which is makes the bed load size smaller and smoother.
Lower course - The gradient levels off, but the speed of the river is very fast because there is a low amount of friction acting on the river water. The river is very wide because of the vast amount of water and the vast amount of erosion that has occurred over the years. The closer you get to the mouth of the river the wider and deeper the river becomes. The volume of discharge is extremely large and the bed load size is small pebbles, which are smooth and not sharp.
Explanation:
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