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OXYGEN IN LAKES, STREAMS,

OXYGEN IN LAKES, STREAMS,. AND RESERVOIRS. SOLUBILITY OF OXYGEN IN WATER RELATIVE TO PRESSURE. SOLUBILITY OF OXYGEN IN WATER RELATIVE TO TEMPERATURE. OXYGEN. SOURCES. LOSSES. CHEMICAL HUMIC ACIDS IRON COMMUNITY METABOLISM. ATMOSPHERE PHOTOSYNTHESIS. RED MUD – BLACK MUD.

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OXYGEN IN LAKES, STREAMS,

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  1. OXYGEN IN LAKES, STREAMS, AND RESERVOIRS

  2. SOLUBILITY OF OXYGEN IN WATER RELATIVE TO PRESSURE

  3. SOLUBILITY OF OXYGEN IN WATER RELATIVE TO TEMPERATURE

  4. OXYGEN SOURCES LOSSES CHEMICAL HUMIC ACIDS IRON COMMUNITY METABOLISM • ATMOSPHERE • PHOTOSYNTHESIS

  5. RED MUD – BLACK MUD

  6. ORTHOGRADE OXYGEN CURVE

  7. CLINOGRADE OXYGEN CURVE

  8. CHANGE IN SEASONS IN A DIMICTIC LAKE

  9. HOW COULD TWO SIMILAR LAKES HAVE SUCH DIFFERENT OXYGEN PROFILES IN SUMMER?

  10. CHANGE IN OXYGEN PROFILE THROUGH A SUMMER SEASON

  11. HETEROGRADE OXYGEN CURVES

  12. SUPPOSE A LAKE HAS THE FOLLOWING CLINOGRADE OXYGEN CURVE AT THE END OF THE SUMMER SEASON

  13. CASCADE OF EVENTS LEADING TO TURNOVER WITH CHANGE IN OXYGEN PROFILE

  14. OXYGEN CONCENTRATION UNDER CLEAR ICE

  15. LATER IN WINTER

  16. WARMING OF A LAKE DURING SPRING AND EARLY SUMMER

  17. LONGITUDINAL OXYGEN CONCENTRATION IN A STREAM

  18. DAILY OXYGEN CYCLE

  19. OXYGEN CYCLE IN LAKE ERIE BASIN

  20. LAKE NASSER • Surface area [km2] 6,000 • Volume [km3] 162 • Maximum depth [m] 110 • Mean depth [m] 70 • Water level Regulated Normal range of annual water level fluctuation [m] 25 • Length of shoreline [km] ca. 9,000 • Catchment area [km2] 2,849,000

  21. LONGITUDINAL PROFILE OF LAKE NASSER

  22. LAKE NASSER OXYGEN

  23. OXYGEN DEFICIT INCREASES WITH • INCREASED PHYTOPLANKTON PRODUCTION • INCREASED PHOSPHATE • INCREASE IN HYPOLIMNETIC VOLUME

  24. OXYGEN DEFICIT PROPORTIONAL TO THE INVERSE OF THE EPILIMNETIC TRANSPARENCY Example: Diamond Lake in Oregon

  25. DO DYNAMICS IN SURFACE WATERS (WETZEL, TABLE 9-2)

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