GEOG201 Study Guide - Quiz Guide: Hydrolysis, Landslide, Silt

• School: University of Waterloo
• Department: Geography and Environmental Management
• Course: GEOG201
• Professor: Mike Stone

Document Summary

Area within which water flows; water from these areas contribute to discharge at outlet (high to low elevation within a drainage divide) Used to describe composite sizes of particles in a soil sample. Clay has a very low infiltration capacity because it has elements that are positively charged and. Influence on tribulation of water through system produces a cohesive bond between water and clay. Clay has a high cation exchange capacity (cec) Positively charged ions (iron, manganese, aluminum) have capacity to bond negatively charged ions to system. When clay gets wet, it swells and inter-particle spaces get smaller; when clay dries, it contracts. A point at which a landform becomes unstable and the system shifts to a new equilibrium. Internal threshold: changes are possible independently within the system (i. e. meander cut offs, oxbow formation) External threshold: brought about by change in an external factor to the system (rainfall triggering landslide)