GEG 120 Study Guide - Midterm Guide: Hydraulic Action, Aggradation, Alluvium
14 May 2013
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Triggered by heavy rainfall on dry area (quickly dries after precipitation) Water content affects flow and proportion of rock debris. Section of steep hillside lubricated until it flows (regolith) Slumping: goes down and slides down one section at a time. Mostly affects soil (freeze-thaw/wet-dry sequences) overburden material, transitional mainly happens in respect to true soil; if the temps are cold enough it is a freeze thaw. Water plays a key role- strong impact on landscape. Rockslides (bedrock on denuded slopes, esp. on mountains) surface where there is nothing but bedrock. Rocks and boulder accumulation at base of slope>> including talus cone) River cutting into valley side over steepens slope. 25 % of earth"s fresh water lockes inside the lithosphere. Originated through infiltration and stored in two zones. Gradient: slope of channel (relief of a stream segment) Discharge: volume of water passing a point over time. Velocity: speed of water flow, which varies in channel.
