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CHAPTER 17 - CHAPTER 17 WATER POLLUTION AND PREVENTION I...

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CHAPTER 17 WATER; POLLUTION AND PREVENTION I. Water Pollution A. What is Water Pollution? 1. Water pollution can be defined as "the presence of a substance in the environment that because of its chemical composition or quantity prevents the functioning of natural processes and produces undesirable environmental and (human) health effects." 2. Biochemical/Chemical Categories of Water Pollutants a. Biodegradable · Rapidly degradable (non-persistent) · Slowly degradable (persistent) b. Nonbiodegradable 3. Legal Categories of Water Pollutants a. Non-pont-source pollutants b. Point-source pollutants 4. Pollutant Classes (These are not mutually exclusive classes) a. Pathogens b. Organic wastes c. Chemical pollutants d. Sediments e. Nutrients
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Fig. 18.1 Pollution is an outcome of otherwise worthy human endeavors. Major categories of pollution and their causes are shown. Fig. 18.2 Point sources are far easier to identify and correct than the diffuse nonpoint sources.
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Fig. 18.5 The ecosystem of a stream differs with different sediment bedloads. This figure shows (a) Low sediment bedload and (b) High bedload. II. Eutrophication - What Happens when Organic Wastes, Sediments, and Nutrients are not Controlled/ A. What is an Oligotrophic Body of Water? B. What is a Eutrophic Body of Water?
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