16_Wter_PoltSP2008 - Lecture 16 Water Pollution and...

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1 Lecture 16: Water Pollution and Cleaning it Up Costs and Processes Geography 1000 Why not let’s get some terms out of the way…. Dead Zone (Hypoxic area and Nitrogen) p. 437 Algal Bloom Control Act p. 438 Eutrophication and impacts p. 438 and again p. 455 Pathogens Carried by Sewage (first 3 in Table 17-1) p. 4 Fecal Coliform Test and indicator organism p. 443 Primary and Secondary Treatment of Sewage p. 449-450 Anaerobic digestors (sludge digesters) p. 451 Composting and Pasteurization p. 452 Benefits of reconstructed wetlands p. 453 Lake Washington recovery p. 459
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2 Remember: Zen Master Greg Says: Lo, recall the hydrologic cycle…..from # 4 The “Natural” Hydrologic Cycle has been radically altered in many places. Run-off from precipitation has now become a principal “vector” of non -point source pollution into water bodies. Ground water comes into contact with land fill effluent and sewage. • “Built - up” areas lack drainage and toxic releases concentrate over time. Factories release dioxins, PCBs, Sulfur Dioxide, and other compounds which “drift” and cause acid rain
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3 That human touch…... Now this is NOT to say progress has not been made!! Water Quality in many US lakes and rivers is vastly improved over a generation ago.
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