with all of our understanding, why is it that we cannot predict/expect landslides, etc? angle of repose- the angle that the material is resting on, also the balance between pull of gravity and the inherent friction that is there. the maximum angle that material can rest at before movement occurs. steep angle of repose vs shallow: coarse and rough takes more friction to move. water - rain for example, which soaks into slope, adds weight, and reduces friction between particles. fluvial processes for chapter 16 for wed and fri drainage basin- what characteristics of the watershed affect how the water moves? land use, climate, topography, soil type, size of shed, pavement, and urban life affects ground water. natural habitats are like sponges rainfall falling on either side of the continental divide makes its way to different parts, like mississippi. (missouri river is a tributary to mississippi river. )
how do desert rivers flow differently than wet climates? desert rivers go dry, and don’t flow as much. desert rivers respond quickly to rainfall and then change quickly. what kind of landforms would you encounter in upper and lower part of the watershed? upper- streams are clearer, the topography is more mountainous and rocky, waterfalls= more aggressive landscape; canyons and rapids lower- flatter, capacity is greater because it has collected all the stuff and doesn't move as fast; much less elevation and velocity slows down, and discharge(water that flows through channel at any given moment. units= cubic feet or meters per second) goes up. velocity- the faster the water, the bigger the material the water can move. competence- tells you the size of the particles that the river is moved (velocity squared) capacity- total stream load, weight or volume of material that river is carrying. capacity is determined by discharge. *competence in the lower river is barely zero, but the capacity is high, even though what it carries is sand and silt. every year, new orleans sinks more and more below sea level. the sediment is not able to be dumped into delta. wetlands buffer city from hurricanes. friday- case study of colorado river. 3 short answer 10 questions on rocks 3 questions on landscape interpretation- photograph of landscape or landform and ask to tell something about the processes operating in that image. answer one of two 30 pt questions. ten sentence limit on this response shorthand- make a point= drop an example to illustrate your point w/ (e.g limestone) exam is not memorization= it is critical thinking about processes. we think nature is immovable. ex: rocks don’t bend easily. to what extent is the case, and when is it not the case? - tectonic plates. wind, soil erosion, climate change, accumulation of sediment= fragments, becomes solid again, cycle.