Water Quality (Rivers)

Dissolved gases & major ions; Bicarbonate buffer system; Nutrients- N, P and DOC; Water temperature

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1. Dissolved gases in rivers include

  • Nitrogen (N2)
  • All of the above
  • Oxygen (O2)
  • Carbon dioxide (CO2)
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2. What varies the dissolution of O2 and CO2 in rivers?

  • A and C
  • Water temperature
  • Atmospheric partial pressure

3. When water temp rises, the conc of O2 and CO2...

  • Falls
  • Rises
  • Stays the same

4. In groundwater there is...

  • Low O2 and low CO2
  • High O2 and high CO2
  • Low O2 and high CO2
  • High O2 and low CO2

5. Why is this?

  • A and B
  • Respiration
  • Organic matter processing
  • A and C
  • Photosynthesis
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