Chapter_11 - WATER POLLUTION Hog farms were inundated during the 1999 Hurricane Floyd The animal waster lagoons filled with hog waste were flushed

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Unformatted text preview: WATER POLLUTION Hog farms were inundated during the 1999 Hurricane Floyd The animal waster lagoons filled with hog waste were flushed into rivers or streams due to increase in water levels and/or rupture Deceased hogs were buried in shallow graves that were close to the water table or in flood plains and their decay led to contamination of shallow groundwater as well as rivers Stricter regulations were put in place after this catastrophe. The clean water act is being reinforced and the 4000 animal waste lagoons are bring cleaned. Water pollution • It is defined as the degradation of the quality of water by biological, physical or chemical criteria • A pollutant is a substance whose excess causes harmful effects to living organisms Selected pollutants • Oxygen demanding bacteria: Bacteria that feed on organic matter and require oxygen for survival reduce the amount of oxygen. A high biochemical oxygen demand (BOD) indicates high amount of decaying organic matter • Pathogenic Organisms: There are numerous pathogenic microbes but the most important is fecal coliform bacteria specifically e-coli that are harmful. Numerous outbreaks that went undetected (so people could boil water) are lethal • Nutrients such as nitrogen and phosphorus help “feed” algae resulting in algal blooms that cut off sunlight and...
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This note was uploaded on 02/10/2011 for the course GEOL 103 taught by Professor Lakshmi during the Spring '10 term at South Carolina.

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Chapter_11 - WATER POLLUTION Hog farms were inundated during the 1999 Hurricane Floyd The animal waster lagoons filled with hog waste were flushed

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