when the hard and soft rocks lie across the path of the river alternatively the harder rock areas remain slightly higher than the soft rock areas in such instances the river appears jumping over some what raised parts of its bed which are called ..............
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.................alternativerocks.
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When the hard and soft rocks lie across the path of the river alternatively the harder rock areas remain slightly higher than the soft rock areas in such instances the river appears jumping over some what raised parts of its bed which are called rapids.
About Rapids
- These are the sections where a river bed has a sharp steep whixh can increase the velocity and turbulence of the river.
- A rapid is a shallow, fast-moving body of water in a stream. Rapids tend to form in new streams where the water is straighter and faster than the old ones. Soft rocks in riverbeds erode or wear away faster than hard rocks. This process is called differential erosion.
- Typical rapids in rivers around the world are caused by five factors: water, steep slopes, hard rock, soft rock, and time. Because water drains faster on these steep sections, soft rock erodes faster than hard rock, resulting in different water levels and velocities.
- Rapids are fast-flowing bodies of water that roll over rocky, shallow riverbeds. They form when water transitions from hard rock, which resists water erosion, to soft rock, which erodes more easily. Debris formed by erosion interrupts the flow of rivers but is not large enough to form waterfalls.
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