GEOG 1300 Lecture Notes - Lecture 6: Sample Size Determination, Hydraulic Conductivity, Macropore
21 Apr 2016
School
Department
Course
Professor
Document Summary
Continuing transfer of water from atmosphere, lakes, streams, glaciers, soil, plants, animals, and ocean. Catchment/drainage basin/watershed: area of land which drains into a particular stream, open system, measurable inputs/outputs, boundary = drainage divide, efficiency of water removal = proportion of hillslope area to channel density. Water reaches channels via hillslopes: different flow pathways exist, paths determine water quality, paths controlled by climate, topography, soil, vegetation. Drainage basins are nested in larger drainage basins. Movement of water on hillslopes occurs in a # of forms: overland flow, subsurface flow, micropores, natural soil pipes, displacement flow, groundwater discharge. Spectrum of runoff processes: related to type/intensity of erosion processes and resulting mode of hillslope/landform evolution. Runoff production and role in generating river flow. Remote sensing commonly used today: radar techniques more accurate, satellite imagery estimate snow cover and water storage in snowpacks. Measurement problems caused by forms of precip other than rain, and wind turbulence at gauges.
