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Offline Deskmate

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Rejuvenation
« on: February 10, 2016, 03:29:43 PM »
Rejuvenation occurs when the river’s base level falls (i.e. when sea level falls). This can be a consequence of either a fall in the amount of sea water or the land rising. Both are the result of the comings and goings of ice ages. The effect on rivers is to produce features called “knick points” (which can be seen as waterfalls and rapids), river terraces and incised meanders.
  Features Of Rejuvenation  Incised Meanders Incised meanders are meanders which are particularly well developed and occur when a river’s base level has fallen giving the river a large amount of vertical erosion power, allowing it to downcut. There are two types of incised meanders, entrenched meanders and ingrown meanders. entrenched meanders are symmetrical and form when the river downcuts particularly quickly. Due to the speed which the river downcuts, there is little opportunity for lateral erosion to occur giving them their symmetrical shape. Ingrown meanders are asymmetrical. They form when the river downcuts at a less rapid pace, giving the river opportunity to erode laterally as well as vertically.
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