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【導(dǎo)讀】Room305,45St.GeeSt.Room306,45St.GeeSt.2-4pm,Monday,Room305,45St.GeeSt.for2-daydelay,etc.watersoftheearth,theiroccurrence,NaturalHazards. WaterSupply. Flood. Drought. onagriculture,forestry,transportation,etc.SoilErosion. rainfallevents,formingrills,galleys,streams,andrivers.inadecreaseinplant-availablewater.Irrigation. Transportation. Plantgrowt
【正文】 Increasing urbanization Increasing agricultural and industrial production The global demand for water is now about 3500 km2/year Water is an important ponent of the Earth environment system 1. Biosphere ? Vegetation distribution ? Plant growth ? Indirect effects on global climate 2. Lithosphere ? Significant geomorphic agent ? Topography resulting from tectonics determines water distribution ? Plate tectonics determines distribution of oceans 3. Atmosphere ? Fundamental in redistribution of energy ? Most important “greenhouse gas” affecting climate ? Sea level Human activities directly affect local, regional and global hydrology ? Direct effects of extraction (ground water, river water, lake water, etc.) ? Deforestation ? Urban development
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