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CHAPTER 4.3 Water, Air and Land Resources

CHAPTER 4.3 Water, Air and Land Resources. Freshwater Pollution. Pg 109 Table 2 Major Types of Water Pollution. SOURCES OF WATER POLLUTION. Point-Source Pollution = comes from one specific source. Easier to identify, so easier to control. Dishwater from homes. Factories.

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CHAPTER 4.3 Water, Air and Land Resources

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  1. CHAPTER 4.3 Water, Air and Land Resources Freshwater Pollution Pg 109 Table 2 Major Types of Water Pollution

  2. SOURCES OF WATER POLLUTION Point-Source Pollution = comes from one specific source.Easier to identify, so easier to control. Dishwater from homes Factories Leaking Underground Oil or Gas Tanks Power Plants Dumping Heated Water Mistakes at Wastewater Treatment Plants Damaged Wastewater pipes

  3. NON-Point-source pollution = specific source can’t be identified or comes from too many places.Hard to identify, so hard to control. Acid Rain Oil, Debris and Salts from Roads Fertilizer runoff caused this ALGAL BLOOM on the James River in Virginia. Silt and Soil from Farms Fertilizers and Weed Killers on Golf Courses Fertilizing Crops Flash: Endless Voyage: Dirty Water Mercury from Coal Burning Plants

  4. There’s been a death at Hughes’ Pond! Did Wild Willie die from drinking unhealthy pond water or was he MURDERED! Let’s look at the suspects! Bathing Bertha Speedy Sam Mr. Bubbles C. E. Owe HUGHES POND Professor Acid R. Base Farmer John

  5. EOD LESSON 21 Evaluating Water System Health Meet Detective Bob. Bob’s Mission: Determine if Wild Willie’s death was the result of drinking unhealthy pond water or a MURDER! HUGHES POND

  6. PHYSICAL INDICATORS Temperature: First Bob must examine the temperature of the pond. Bob knows that the temperature must be cool for the pond to be healthy. Temperature, dissolved oxygen, pH, and water clarity. Cool water can hold more oxygen than warm water. More oxygen means healthier water. Hot water will also indicate that Bathing Bertha killed Willie! Good! The water is cool. HUGHES POND

  7. pH: Next Bob must examine the pH of the pond. Bob knows that pH measures the acid or base . The pH should be neutral. Neutral is 7.0 on the pH scale. Anything higher or lower would indicate an unhealthy pond … and Professor Acid R. Base! Perfect! We appear to have a nice pH of 7.0. HUGHES POND

  8. Dissolved Oxygen: Next Bob must examine how much oxygen is dissolved in the water of the pond. Bob knows that the pond must have adequate dissolved oxygen to be healthy. High Oxygen content. Excellent! Low water temperature should mean we have high dissolved oxygen content. Mr. Bubbles could have sucked all the dissolved oxygen out AND murdered Wild Willie! HUGHES POND

  9. Turbidity: Now Bob must examine the turbidity (clarity) of the pond. Bob knows that high turbidity is very unhealthy. I see a bit of algae which can cause high turbidity… Or Speedy Sam could have stirred up the pond! But it doesn’t appear to be an ALGAL BLOOM so I think we’re ok. HUGHES POND

  10. CHEMICAL INDICATORS: Nitrates = nitrogen compounds that plants use for growth. If we have too many nitrates in the pond, the pond will become overcome with pond scum and other unwanted plant life. Farmer John always carries fertilizer in his pockets. He could have killed Willie and dropped some in he pond! HUGHES POND Lucky for you Farmer John. The nitrates are normal!

  11. BIOLOGICAL INDICATORS: Organisms or parts of organisms that are sensitive to water health. Healthy trout and low levels of chlorophyll a are indicators of good health. Should there be trout in a healthy pond? Should there be lots of chlorophyll a? If I can sneak up on the trout in this pond I can see if it appears healthy or unhealthy. Maybe C.E.Owe killed Willie to hide waste dumped from his factory! Excellent! There’s plenty of trout and they appear to be healthy and happy. HUGHES POND

  12. I’m pleased to report that I studied the physical indicators, the chemical indicators and the biological indicators and I must report that the pond appears to be healthy. That only leaves one suspect! It’s E. Vill Bill! The local robber!

  13. What kind of detective are you? Identify which of the following bodies of water are healthy. Clues: pH = 5.0, high turbidity, low oxygen, high nitrates Deductions = high temperature, algal blooms UNHEALTHY!

  14. Clues: pH = 7.3, low temperature, high chlorophyll a UNHEALTHY!

  15. Clues: low temperature, high dissolved oxygen, pH 7.0 HEALTHY !!

  16. Air Pollution HSW: Emerging Careers: Air Quality Specialists Pg. 110 Figure 19 Major Primary Pollutants Global Warming Animated Map Link http://geology.com/news/images/a10_1891_1997_6fps_800kbps_sor3.mov

  17. Land Loss HSW: Emerging Careers: Soil Conservationists Pg. 112 Figure 21 Virgin Forests

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