GLG 121 Lecture Notes - Lecture 9: Oxbow Lake, Cut Bank, Flow Velocity
26 Oct 2016
School
Department
Course
Professor
Document Summary
0. 0001% stream channels (of total water budget: even though they are such a small percent, stream channels are the main agent of erosion. Velocity: the speed at which water flows, farther from the banks, faster it flows, middle of stream = maximum velocity (just below surface) Stream flow = velocity: velocity = speed of water flow. Hydrograph: shows water flow over time. Ex: runoff from a flash flood event. Meanders: when stream curves, the location of the maximum velocity shifts over. Cut bank: bank that is cut away because the maximum velocity shifted away from the center to a corner and cut away part of the bank, opposite of point bar. Point bar: deposited where the water on the inside of a meander slows, lower velocity and deposition, deposits material on inside of bend, opposite of cut bank. Oxbow lake formation: cuts off flow of stream to create a new formation, can cut off main supply of water.
