GEOG 101 Lecture Notes - Lecture 12: 100-Year Flood, Suspended Load, Flow Velocity
Document Summary
Downslope movement of rock sediment, or soil in response to gravity. Loading at the upper part of a slope. Removal of supporting material at the base of a slope. Plastic limit-moisture content when they behave like plastic. Moisture content where they behave like liquid. Detachment and movement of soil or sediment by water, wind, or ice. Fluvial erosion-rivers and streams (william morris davis) Soil erosion-detachment of soil and moving down slope to be deposited. Competence-size of sediment that can be carried. Capacity-amount of sediments that can be moved. Ephemeral streams-only flow immediately after rainfall or snow melt. Q=va or q= width * depth * velocity. 5ft x 5ft x 5ft/sec = 125 cfs (cubic feet per second) Erosions at nick points-where there is resistant material, niagara falls. Competence-largest sediment particles a stream can transport. Capacity-measure of the amount of sediment a stream can transport. Function of volume of flow and flow velocity.
