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JC GEOG
River Procesess and Landforms
| Term | Definition |
|---|---|
| Abrasion | wearing away of riverbed and sides when particles carried by river erode the sides |
| attrition | stones become rounded by hitting off each other |
| v-shaped Valley | valley has steep sides and a narrow floor |
| interlocking spurs | flowing water goes around hard rock -erosion occurs on the outside of a bend this forms this feature |
| waterfalls | vertical fall in a river |
| Hydraulic Action | force of moving water that breaks up rock over time |
| flood plain | fine material deposits build up to form a level plain |
| meanders | as the river slows down this causes it to swing from side to side and forms this feature |
| ox-bow lakes | meanders form a loop so only a narrow neck of land separates their outer banks in heavy flood the river cuts through this neck leaving the loop as a cut off river deposits seal up the cut off forming this feature |
| deltas | when a river deposits its load as it enters the sea often triangular in shape |
| levees | high banks along the river's channel formed from river deposits -old stage |
| floods | rivers overflow their banks |
| stages in a river | young, mature , old |
| source | place where a river begins |
| tributary | a river that joins a larger one |
| confluence | place where rivers join |
| mouth of a river | place where a river enters a lake or sea |
| estuary | part of a river's course that iastidal |
| basin | entire area drained by a river and its tributaries |
| watershed | high ground that separates one river from another |
| suspension | particles are lifted and carried by the river water |
| saltation | particles are bounced along the river bed |
| traction | large stones are dragged along the river bed |
| solution | some minerals such as calcium carbonate are dissolved in the water |