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Temperature in Freshwater Systems

By Anna Lochte, Sanjukta Dutta, Genevieve Grivas, and Kinley Sinkus. Temperature in Freshwater Systems. Definition.

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Temperature in Freshwater Systems

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  1. By Anna Lochte, Sanjukta Dutta, Genevieve Grivas, and Kinley Sinkus Temperature in Freshwater Systems

  2. Definition Temperature is the measure of molecular motion or the degree of heat of a substance. It is also the mean kinetic energy of particles moving relative to the center of mass for that object. It is measured on an arbitrary scale from absolute zero, where the molecules theoretically stop moving.

  3. Normal/Acceptable Ranges Varies seasonally, and by depth of river Summer: 4°C-22°C Winter: 0°C (ice)-4°C (at lowest point) Spring/Fall: uniformly 4°C Problems caused by high/low temperatures • Increases metabolic rate of animals, affecting food chains • Decreased levels of dissolved oxygen in water • Decrease in river biodiversity • Some fish will not reproduce at higher temperatures

  4. What affects temperature in a river? Climate change Runoff and flood plains Heat carried by groundwater Human influences (deforestation, rainwater dripping from hot, paved surfaces, pollution) Water used to cool electrical power plants returns at higher temperatures Streamside vegetation

  5. Ways to alleviate/prevent temperature change? Prevent global warming/conserve energy Stop dependency of water extraction for use in human systems

  6. Converting C° to F° N x 1.8 + 32 Example: 100°C x 1.8 + 32 = 212°F

  7. Citations www.weather.com/glossary/t.html www.ucmp.berkeley.edu/exhibits/biomes/freshwater.php www.climate-and-freshwater.info www.waterencyclopedia.com/re-st(stream-biology-temperature-impacts-on.html www.ipcc.ch/polf/assessment-report/ar4-wg2-chapter3.pdf www.photo-dict.faqs.org/phrase/5972/mercury-thermometer.html Www.globalwarming2009.blogspot.com Www.theplantpictures.onsugar.com Www.myvaloancalculator.com

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