Earth Sciences 1022A/B Lecture 15: Lecture 15 - Running Water

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as discharge increases other stream parameters (width, depth, velocity) also increase. dissolved ions in solution from chemical weathering. suspended finer particles in the water column. bedload coarser particles sliding and rolling along the channel floor. saltation occurs when particles alternate between the bed and suspended loads (latin saltar leap/jump) 7&ved=1t:429,r:1,s:0: deposition: occurs when a stream slows down big particles settle first, then smaller ones . coarser channel deposits as bars; finer floodplain deposits y stream valleys: narrow: v-shaped by down-cutting on a steep gradient as the sides cave in; waterfalls and rapids common, wide: mainly sideways cutting on a gentle gradient; floodplains. meanders form on a floodplain as the stream shifts sideways y by cutting into the outsides of meander bends at cut banks y and depositing on the insides of bends at point bars y http://berkeley. edu/news/media/releases/2009/10/i mages/invitro1_h. jpg. cutoffs and oxbow lakes from streams trying to straighten their channels y http://www. uleth. ca/vft/oldman_river/oxbow. jpg.

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