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Www.HoosierRiverwatch.com Dissolved Oxygen Pollution Types.

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Presentation on theme: "Www.HoosierRiverwatch.com Dissolved Oxygen Pollution Types."— Presentation transcript:

1 www.HoosierRiverwatch.com Dissolved Oxygen Pollution Types

2 www.HoosierRiverwatch.com

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5 POINT SOURCE 25%  direct discharge from industry, sewage treatment plants, etc.  easier to identify due to “end of pipe” NONPOINT SOURCE 75%  general runoff of water contaminated by poor land use, homes, streets, air, etc.  hard to identify

6 www.HoosierRiverwatch.com

7 T YPES OF P OLLUTION ORGANIC  decomposition of once- living material  human & animal waste, algae INORGANIC  suspended & dissolved solids  silt, salt, minerals TOXIC  heavy metals and lethal organic compounds  iron, mercury, PCBs THERMAL  water heated by urban runoff or industry  streets, nuclear power BIOLOGICAL introduction of non-native species (zebra mussels)

8 SEDIMENT is the #1 source of water pollution to waterways! www.HoosierRiverwatch.com

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10 Chagrin River Watershed

11 www.HoosierRiverwatch.com Grand River Watershed

12 www.HoosierRiverwatch.com Why Are You Monitoring?  Is it safe for swimming?  Determine stream health – baseline data  Identify pollution sources  Have fun while serving your community!  What are Your Goals? Environmental, Community, Educational

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14 Macroinvertebrate Sampling Riffle Habitat  What are we testing for?  Fun of it?  Fun of it?  Biodiversity  Stream Quality – etc.?

15 www.HoosierRiverwatch.com Dissolved Oxygen (DO)  Is found in microscopic bubbles of oxygen that are mixed in the water and occur between water molecules.  DO is a very important indicator of the ability to support aquatic life.  Fish "breathe" by absorbing dissolved oxygen through their gills.

16 www.HoosierRiverwatch.com Dissolved Oxygen (DO)  Oxygen enters the water by absorption directly from the atmosphere or by aquatic plant and algae photosynthesis.  Oxygen is removed from the water by respiration and decomposition of organic matter.

17 www.HoosierRiverwatch.com Interrelationships

18 www.HoosierRiverwatch.com Dissolved Oxygen (DO) 1. DO = Oxygen gas dissolved in the water; Primary indicator of water quality 2. DO gets into water from air & photosynthesis 3. Fish need it to breathe! Higher DO Higher diversity of aquatic organisms 4. We consider % Saturation – when measuring DO.

19 www.HoosierRiverwatch.com

20 Biochemical Oxygen Demand 1. Amount of oxygen consumed by bacteria during breakdown of organic matter DO (Original sample) – DO (Day 5) = BOD 5 2. Wastes produced by breakdown of aquatic vegetation, animals, feedlot runoff, etc. 3. High BOD 5 = potential for oxygen depletion in the water 4. High BOD 5 generally correlated with high nutrient levels

21 www.HoosierRiverwatch.com

22 Phosphates 1. Nutrient essential to plant growth, naturally present in low concentrations 2. Enters water via runoff; present in fertilizers, attached to soil particles, and in organic waste 3. Can lead to eutrophication = nutrient overload and the system’s response (lots of plant growth) 4. High P often results in low DO

23 Gulf of Mexico’s “dead zone” Temp BOD www.HoosierRiverwatch.com

24 Nitrates 1. Nutrients essential to plant growth 2. Sewage is main source to rivers and streams 3. Excessive amounts contribute to eutrophication 4. High nitrate levels often correspond to high total phosphates and low DO

25 www.HoosierRiverwatch.com Turbidity 1. The relative clarity of water. 2. Caused by suspended solids in water (from soil erosion, algae) 3. Can photosynthesis, temperature, DO, smother habitat, and clog gills 4. May be associated with low DO and high total phosphorus

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27 Secchi Disk

28 Bozeman Science: DO  https://www.youtube.com/watch?v=XEcB QurjUQ4 https://www.youtube.com/watch?v=XEcB QurjUQ4 https://www.youtube.com/watch?v=XEcB QurjUQ4 (Thanks Mr. Anderson) (Thanks Mr. Anderson) www.HoosierRiverwatch.com

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32 Net Spinning Caddisfly  Are more tolerant to pollution than other caddisflies  Have hair-like gills all along their abdomen

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38 “ Never doubt that a small group of thoughtful, committed citizens can change the world. Indeed, it’s the only thing that ever has.” MARGARET MEADE

39 Amount of Dissolved Oxygen (mg/L) your water sample would need to be 100% Saturated at the given temperature.* *at sea level www.HoosierRiverwatch.com

40 __DO mg/L__ (your sample) Max DO mg/L (from chart determined by water temp) Example at 19º C: 8.0 x 100% = 84.6% 9.45 Calculate % Saturation: X 100%

41 www.HoosierRiverwatch.com

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