12 Freshwater I - Freshwater Distribution of Water Water...

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Unformatted text preview: Freshwater Distribution of Water Water source Percent of fresh water Percent of total water Oceans, Seas, & Bays--96.5 Ice caps, Glaciers, & Permafrost 69.6 1.79 Groundwater 30.1 1.7 Lakes 0.26 0.013 Soil Moisture 0.05 0.001 Atmosphere 0.04 0.001 Wetlands, Swamps 0.03 0.0008 Rivers 0.006 0.0002 Biological Water 0.003 0.0001 Source: USGS 70% of fresh water on earth exists as ice South pole – 2 miles deep North pole – 15 feet deep Melting = 200 ft sea level increase- 375 ft + 45 ft If all the atmospheric moisture fell to the earth at once the sea level would rise only one inch Available Freshwater Groundwater Lakes Soils Wetlands Rivers 0.775% 0.8% 1E+14 2E+14 3E+14 4E+14 5E+14 6E+14 7E+14 8E+14 9E+14 1E+15 acre-feet of water E a r t h F e s w I c n d G l i L q u o S f W k A m p R v Resource Water on Earth 5E+12 1E+13 2E+13 2E+13 3E+13 3E+13 Resource Freshwater on Earth 1E+12 2E+12 3E+12 4E+12 5E+12 6E+12 7E+12 8E+12 9E+12 1E+13 Resource Liquid Water on Earth 98% of readily available freshwater is in groundwater Water Distribution Location, Location 6 countries possess half of the world’s total renewable freshwater supplies. Brazil Colombia Russia Canada Indonesia China Water Availability and Location Greenland: 8 million gallons/person/day Alaska: 1 million gallons/person/day Congo: 130,000 gallons/person/day South America: 3 of the 10 largest rivers Gaza: 37 gallons/person/day Australia is the driest continent, but has small population Asia has 2/3 of world population, but 1/3 renewable water 25% of fresh river water 5% of world population Water Demand The three major factors causing increasing water demand over the past century • population growth • industrial development • expansion of irrigated agriculture....
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This note was uploaded on 02/10/2011 for the course SWS 2007 taught by Professor bonczek during the Fall '09 term at University of Florida.

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12 Freshwater I - Freshwater Distribution of Water Water...

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