1 / 24

Why all the fuss?

Update on Water Quality in Lake Eucha M. D. Smolen Biosystems and Agricultural Engineering OSU January 31, 2002. Why all the fuss?. The lake is clear and clean. The fishery is good. But Tulsa water tastes bad. Algae Blooms produce taste and odor

kendall
Download Presentation

Why all the fuss?

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Update on Water Quality in Lake Eucha M. D. SmolenBiosystems and Agricultural Engineering OSUJanuary 31, 2002

  2. Why all the fuss? • The lake is clear and clean. • The fishery is good. • But Tulsa water tastes bad

  3. Algae Blooms produce taste and odor substances that are very difficult to remove.

  4. What are the blooms and what causes them? • Microscopic algae –sometimes in clumps, but not always • Can occur winter or summer • The culprits appear to be “bluegreens” and “diatoms”

  5. Anabaena flos-aquae

  6. Stephanodiscus niagare

  7. Melosira italica

  8. What causes algae blooms? • Innoculation – invasive species • Lots of nutrients: • Nitrogen and Phosphorus • Sunlight • Low grazing pressure • Some competitive advantage

  9. Nutrients in Lake Eucha • Have been increasing for the past 20 years • Very high Nitrogen concentration • Algae growth is limited by Phosphorus

  10. ADPC&E Data Nitrate Phosphate

  11. Nitrate in tributaries 1993-1994 Background Oklahoma Conservation Commission Data

  12. Phos in Tribs 1993-1994 Background Oklahoma Conservation Commission Data

  13. Nitrate at Beaty and Spavinaw 1998-01 Tulsa Metropolitan Utility Data

  14. TP 1998-2001 Tulsa Metropolitan Utility Data

  15. Comparison of TP 93 to 2000 1998-2001 1993-1994

  16. Comparison Nitrate 93-00 1998-2001 1993-1994

  17. In the lake Algae blooms Bottom of lake Tulsa Metropolitan Utility Data

  18. Tulsa Metropolitan Utility Data

  19. Where do the nutrients come from?

  20. Derived from monitoring data. Phosphorous Loading lbs per acre

  21. Nutrient Loading Observed Data 7.8% 13.9% 0.7% 6% 70.8%* 0.8% *includes 24% from Dacatur

  22. How long will it take to clean up Lake Eucha? • A long time because: • Nitrogen and Phosphorus feed the algae (and the food web). • Dead materials and sediment-bound nutrients settle out in the lake. • This storage feeds the water column periodically. • It may take years to clean out the lake.

  23. It will clean out eventually If the supply of nutrients in runoff stops, the lake will flush.

More Related