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Science · Earth sciences
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  1. Given the following graph explain the following (12 points).
    1. Why does dissolved oxygen change over the 24-hour period with NO AERATION?Typical Daily Oxygen Curve for Outdoor Ponds Oxygen Saturation Minimum Safe Level of Oxygen Zero Oxygen 8 10 12 2 4 6 8 10 12 2 4 6 8 PM AM PM AM AM More Aeration than Required-Wasting Energy O Just Right Aeration No Aeration-Stress&Possible Fishkill at Times

  1. What effect would the pattern observed with NO AERATION over the 24-hour period have on fish?

  1. In addition to dissolved oxygen, what other parameters may be affected by the pattern observed with NO AERATION?

  1. Provide two ways in which AERATION can be applied to the water column to bring levels closer to saturation.
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