EAES 101 Lecture 15: The power of water erosion pt 2
6 Oct 2016
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Document Summary
Time to erode: time lapse of beach erosion, time lapse of permafrost coast erosion: 20 days, the amount and time required for erosion depends upon, velocity, discharge, strength of substrate, coastal erosion tends to be faster. Climate affects coastal erosion: harsh weather favor erosion, calm weather favors sediment accumulation from deposition, tropics-biological systems protect shorelines (reefs, carbonate sediment, mangrove swamps, arctic-barren coasts are dement starved and rocky. On land, erosion forms streams: stream flow begins as water is added to the surface, 3 processes: erosion, transport, deposition flowing water a, sculpts landscapes, moves mass from continents to oceans. 1. river erosion a. the energy of flowing water is from mass and gravity: streams convert potential energy (pe) to kinetic energy (ke). Forming streams: surface water (sheet flow) down cutting, over time, nearby channels merge, smaller tributaries join a larger trunk stream.
