EESA10H3 Chapter Notes - Chapter 3: Waterborne Diseases, Oral Rehydration Therapy, Water Treatment
22 Nov 2012
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Exceptions occur when there is a direct or short path form the surface to the groundwater, when concentrated wastes deep in the soil leach into groundwater, as beneath a landfill, or when wastes are injected directly into the ground. Uses of water: water is used for a variety of purposes by developed societies; human consumption is actually one of the smallest uses, worldwide, 70% of the total withdrawal of water is used for irrigating agricultural land. Industrial uses are substantial in the developing world. Most is used for cooling or flushing equipment. Lastly, our methods of treating and distributing drinking water lead to some chemicals being present within our drinking-water supplies: point sources; sources of contaminants that discharge into receiving waters from a pipe or other identifiable. Include industrial wastes and sewage treatment plants: nonpoint sources; sources of contaminants that cannot be defined by discrete pipes or other devices.
