GEOB 103 Lecture Notes - Lecture 4: Evapotranspiration, Surface Runoff, Evaporation
23 Nov 2017
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Document Summary
Introduction: water (ice, liquid, & vapour) shapes landscapes & interact w/ lithosphere, hydrosphere & biosphere crucial agent of erosion/movement of sediment, action is not uniform: arid vs. humid regions. Hydrologic cycle: describes distribution, & circulation of water. Flooding: floods discharge of river cannot be contained w/in normal channel so water spreads. Flooding: fraser valley: prone to flood risk flood protection = structural response, dike embankment used to prevent flooding of land, hatzic dike = structural response to floods. Groundwater: maintains baseflows in streams & rivers, baseflows maintain river flow through dry weather, geomorphic effects: physical/chemical weathering, erosion, landslides/slope movement, distribution of vegetation influence gw/sw relation, more vegetation = more water being infiltrated. Infiltration rate how quickly water moves into soil: compacted soil = low infiltration rate; loose soil = high infiltration rate, longer rainfall, more soil saturation lower infiltration rate. Groundwater > surface water interactions: baseflow seepage to streams from gw.
