2009 River Raisin water quality results


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3 schools in Monroe County Michigan are involved in conducting water quality tests on the River Raisin: temperature, pH, dissolved oxygen, nitrates, and salinity.

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2009 River Raisin water quality results

  1. 1. River Raisin Study 2009 Fall Data
  2. 2. Dissolved Oxygen <ul><li>Sources of DO </li></ul><ul><ul><li>aquatic plants </li></ul></ul><ul><ul><li>aeration: waterfalls, waves, splashing </li></ul></ul><ul><li>Range of values: 0 to 16 mg/L </li></ul><ul><li>Changes throughout the day and throughout the year </li></ul><ul><li>Inversely related to temperature </li></ul>
  3. 3. Dissolved Oxygen Levels <ul><li>< 7.5 mg/L : sensitive organisms die </li></ul><ul><li>< 5.0 mg/L : cause for concern- fish become stressed </li></ul><ul><li>< 3.0 mg/L : most organisms die </li></ul>
  4. 4. Nitrates <ul><li>Needed for aquatic plant growth </li></ul><ul><li>Too much causes growth of algae and excessive plant growth </li></ul><ul><li>Levels affected by run-off </li></ul><ul><li>Generally range from 0 to 10 ppm </li></ul><ul><li>Maximum for drinking water is 10 ppm </li></ul>
  5. 5. pH <ul><li>Measures the acid content of water </li></ul><ul><li>Ranges from 0 – 14.0 </li></ul><ul><li>7.0 is considered “neutral” </li></ul><ul><li>Most lakes and streams: 6.5 to 8.5 </li></ul><ul><li>Affected by geology and rainfall </li></ul>
  6. 6. Most amphibians and insects can’t survive if pH is <4 or >10 Coke & Pepsi 2.5
  7. 7. Salinity <ul><li>Measures dissolved salts in water </li></ul><ul><li>Measured in “parts per thousand” or ppt </li></ul><ul><li>Oceans: average 35 ppt </li></ul><ul><li>Fresh water: </li></ul><0.5 ppt <1.0 ppt
  8. 8. Salinty 0.5 to 1.5 ppt <ul><li>Can be consumed by humans although most would prefer water in the lower half of this range if available </li></ul><ul><li>When used for irrigation, requires special management including suitable soils, good drainage and consideration of salt tolerance of plants </li></ul><ul><li>Suitable for all livestock </li></ul>Source: http://www.dpi.vic.gov.au/dpi
  9. 9. Salinity 1.5 to 6.0 ppt <ul><li>Not recommended for human consumption. Water up to 1.8 ppt could be drunk if nothing else available </li></ul><ul><li>Not normally suitable for irrigation, though water up to 3.6 ppt can be used on very salt tolerant crops </li></ul><ul><li>Water over 2.4 ppt can cause shell cracking in laying hens </li></ul><ul><li>Drinking water for poultry and pigs should be limited to about 3.6 ppt </li></ul><ul><li>Most other stock can use water up to 6.0 ppt </li></ul>
  10. 10. What do you think? <ul><ul><li>Will the results vary from one location to another? </li></ul></ul><ul><ul><li>Think about each location: Summerfield, Dundee, Monroe </li></ul></ul><ul><ul><ul><li>Are they agricultural, urban, industrial, residential... </li></ul></ul></ul><ul><ul><li>Where would you expect the “best&quot; water to be and why? </li></ul></ul>
  11. 11. The Results: Fall 2009 Testing Salinity Nitrate DO pH Temp City 4.4 1 12.9 7 7.0 ° C Monroe 4.0 1 7.9 7 9.7 ° C Petersburg 6.6 0 9.9 7 7.9 ° C Dundee 2 5.3 0 8.4 7 7.2 ° C Dundee 1
  12. 12. Results Map On Our Wiki
  13. 13. What do the results mean? <ul><li>  </li></ul><ul><ul><li>What is the overall quality of the River Raisin at each testing site? </li></ul></ul><ul><ul><li>Is one site significantly better than another?   </li></ul></ul><ul><ul><li>Are you concerned about any of the data? </li></ul></ul>
  14. 14. Error Analysis <ul><ul><li>What went wrong and why? </li></ul></ul><ul><ul><li>How can we prevent the errors next time? </li></ul></ul><ul><li>  </li></ul>
  15. 15. Hypothesis <ul><ul><li>How will the Winter and Spring test data be different from the Fall? </li></ul></ul><ul><ul><ul><li>Temperature </li></ul></ul></ul><ul><ul><ul><li>pH </li></ul></ul></ul><ul><ul><ul><li>DO </li></ul></ul></ul><ul><ul><ul><li>Nitrates </li></ul></ul></ul><ul><ul><ul><li>Salinity </li></ul></ul></ul><ul><ul><li>What might affect the data? </li></ul></ul>
  16. 16. Evaluation of the project <ul><ul><li>What did you like? </li></ul></ul><ul><ul><li>What did you dislike? </li></ul></ul><ul><ul><li>What else would you like to do in the future? </li></ul></ul><ul><ul><li>How can we make the project better? </li></ul></ul>
  17. 17. Visit our website! <ul><ul><li>http://mcisdriverraisin.wikispaces.com </li></ul></ul><ul><ul><li>Invite your parents, family, and friends </li></ul></ul><ul><ul><li>View maps, pictures, presentations, videos </li></ul></ul><ul><ul><li>Download booklets to print and read </li></ul></ul><ul><ul><li>Links to other water quality websites </li></ul></ul>