Water pollution (dinesh kumar)
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This document discusses various types and sources of water pollution. It identifies point sources like wastewater treatment plants and nonpoint sources like urban runoff. It also discusses different types of water pollutants like bacteria, nutrients, chemicals, and thermal pollution. The document provides examples of how pollution can impact streams and groundwater. It outlines solutions to improve water quality such as drainage management plans, regulating hazardous waste, and improving sewage treatment.
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Water pollution (dinesh kumar)
- 2. Types and Sources of Water Pollution Point sources Nonpoint sources Biological oxygen demandWater qualityWater quality WaterWater QualityQuality GoodGood 8-98-9 Do (ppm) at 20˚CDo (ppm) at 20˚C SlightlySlightly pollutedpolluted ModeratelyModerately pollutedpolluted HeavilyHeavily pollutedpolluted GravelyGravely pollutedpolluted 6.7-86.7-8 4.5-6.74.5-6.7 Below 4.5Below 4.5 Below 4Below 4 Pg. 535
- 3. Point and Nonpoint Sources NONPOINT SOURCES Urban streets Suburban development Wastewater treatment plant Rural homes Cropland Factory Animal feedlot POINT SOURCES
- 4. Water pollution Bacteria,Viruses,Protozoa, Parasitic worms Oxygen demanding substances Inorganic plant nutrients Organic chemicals Sediment or suspended matter Thermal pollution Genetic pollution
- 5. Pollution of Streams Oxygen sag curveOxygen sag curve Fig. 20-5
- 6. Solutions to better water quality Drainage Area Management Plans Agriculture plots 1987 Water Quality Act
- 7. Groundwater Pollution: Causes Coal strip mine runoff Pumping well Waste lagoon Accidental spills Groundwater flow Confined aquifer Discharge Leakage from faulty casing Hazardous waste injection well Pesticides Gasoline station Buried gasoline and solvent tank Sewer Cesspool septic tank De-icing road salt Unconfined freshwater aquifer Confined freshwater aquifer Water pumping well Landfill Fig. 20-11
- 8. Groundwater Pollution Prevention Monitoring aquifers Strictly regulating hazardous waste disposal Storing hazardous materials above ground
- 9. Reducing Water Pollution through Sewage Treatment Primary and Secondary sewage treatment. Figure 20-19Figure 20-19
- 10. Drinking Water Quality Safe Drinking Water Act Maximum contaminant levels Bottled water
Editor's Notes
- Water quality indication of what beneficial uses of water- spawning, recreation, swimming,drinking.
- Bacteria viruses Eat oxygen, phosphates, heat, introduction of non native species Table 19-2 tells all the things from bacteria,…vomiting, diarreha,dehydration
- DAMP- street sweeping, stenciling, public education- Agriculture plots not on steep slope leads to water or have some sort of buffer zone. 1987 Water Quality Act--Main goals to make U.S. waters safe for fishing and swimming. Restore and maintain the chemical, physical, and biological integrity of nations waters. Ÿ 1995 EPA developed discharge trading policy. Much like the sulfur dioxide Ÿ trading policy for air pollution. Industrial plants to sell excess credits. Ÿ Good news--Fishable and swimmable 36% 62% Ÿ bad news-antiquated sewage systems--Earth Tech fund--build and maintain.
- EPA established national drinking water standards called maximum contaminant levels– System of Long Beach- groundwater pumped to Redondo and spring, treated, pumped back out to residences. Usually most safe because it is tested. Privately owned wells are not required to meet test standards. 1/3 of bottled water contaminated with bacteria- not required to do testing. Not required to test like federal government- IBWA International bottle water association. 7 million illnesses and 1200 deaths in the U.S. per year .