ESCI 1012 Lecture Notes - Lecture 20: Time 100, Calendar, Lahar
Document Summary
Quiz topic: north america is the 3rd largest landmass, so its interior is far removed from ocean moisture, warmer atlantic water temperatures can change wind patterns to push rain farther to the west. Floods are part of natural river cycles-short term increases in discharge because of precipitation, melt water, runoff, and soil moisture. As with many natural hazards, primary damage can be severe, but secondary damages are often as great or greater. Rivers are flowing water and sediment (as well as microbes) so there is a ton of mud and microbes that get into houses and lead to mold, complete loss of houses. Cars are pretty much just poorly designed boats. Ability of water to erode transport, and deposit sediment is extremely sensitive to velocity. Hence any change in velocity results in either sediment erosion (if faster) or sediment deposition (if slower) Flood waters in a channel move fast and carry a heavy sediment load.
