Oxygen in lakes streams
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OXYGEN IN LAKES, STREAMS, PowerPoint PPT Presentation


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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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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


ORTHOGRADE OXYGEN CURVE


CLINOGRADE OXYGEN CURVE


CHANGE IN SEASONS IN A DIMICTIC LAKE


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


CHANGE IN OXYGEN PROFILE THROUGH A SUMMER SEASON


HETEROGRADE OXYGEN CURVES


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


CASCADE OF EVENTS LEADING TO TURNOVER WITH CHANGE IN OXYGEN PROFILE


OXYGEN CONCENTRATION UNDER CLEAR ICE


LATER IN WINTER


WARMING OF A LAKE DURING SPRING AND EARLY SUMMER


LONGITUDINAL OXYGEN CONCENTRATION IN A STREAM


DAILY OXYGEN CYCLE


OXYGEN CYCLE IN LAKE ERIE BASIN


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


LONGITUDINAL PROFILE OF LAKE NASSER


LAKE NASSER OXYGEN


OXYGEN DEFICIT INCREASES WITH

  • INCREASED PHYTOPLANKTON PRODUCTION

  • INCREASED PHOSPHATE

  • INCREASE IN HYPOLIMNETIC VOLUME


OXYGEN DEFICIT PROPORTIONAL TO THE INVERSE OF THE EPILIMNETIC TRANSPARENCY

Example: Diamond Lake in Oregon


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


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