GEO 1111 Lecture Notes - Lecture 16: Porosity, Aquifer, River Channel Migration

• School: University of Ottawa
• Department: Geology
• Course: GEO 1111
• Professor: Robert Jack Cornett

Document Summary

Strems erode and transport colossal amount of sediments; continents oceans. Modes of sediment transport: bedload along the bed, saltation periodically lifts off into the flow, suspension in the fluid, solution dissolved load (solutes) Force of (1) buoyancy (2) frictional and form drag due to flow. Gravity to push it down while buoyancy and frictional drag to bring it up. Braided if interlacing network of channels: braided rivers, rapid and irregular, higher slopes, erodible banks, rapid channel migration, abundant coarse sediment. In-channel bars (lense of sediment: meandering rivers. On the other side where water doesn"t crash into a point bar will get flooded and sediment will get moved and deposited. Flood when discharge > stream capacity: input > output, stream over flows its banks, natural process, causes, rapid snow melt. Ice jams: contribution factors, flow infiltration rate, topography. Impact: one of the most deadly and destructive geological hazards, human impact.