ENV100Y5 Lecture Notes - Lecture 17: Pore Space In Soil, Ocean Current, Great Lakes
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ENV100Y5 Full Course Notes
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Document Summary
Makes the earth different from all planets. Important in moving heat from equator to the poles. Rises as vapor, falls as rain or snow. Water is locked up in minerals in the earth"s mantle. Makes the mantle elastic; affects the dynamics of plate tectonics. May be largest water reservoir on the planet. Unknown how much cycles between internal and surface reservoirs through tectonics. Study of water in the hydrosphere, both on and under the ground. Movement, distribution, quantity, quality: reservoirs, processes, ecosystems. Precipitation, surface runoff, infiltration, percolation, evaporation, transpiration. The global hydrologic cycle maintains mass balance- total amount of water is. Local variations affect supply, and cause problems like floods and droughts. Only 2. 5% of earth"s water is fresh. Most of this is tied up in glaciers and ice caps. Water from rain, snowmelt, and springs runs over the surface. Surface runoff (sheetflow) organizes into rills and gullies, then streams and rivers.
