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Project: D/O

Project: D/O. Background Info. Salmon require a D/O of more than 9 mg/l. 5 mg/l is considered very poor. 3mg/l and the organism suffer greatly. Question.

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Project: D/O

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  1. Project: D/O

  2. Background Info • Salmon require a D/O of more than 9 mg/l. 5 mg/l is considered very poor. 3mg/l and the organism suffer greatly.

  3. Question • Does the river now contain enough oxygen to hold and sustain salmon when silt and sediment enters the river in high quantities during and after dam removal?

  4. Hypothesis • We think that the river’s oxygen will not support salmon during and after dam removal while silt is in the river.

  5. Procedure • Grab materials and quality check. • Use GPS to find coordinates of test site. • Use multimeter to find dissolved oxygen levels. Refer to multimeder protocol. • Record data. • Check and record air temperature and time done. • Repeat for a total of 5 locations with different amounts of suspended silt.

  6. Data

  7. Conclusion • We found that the rivers D/O is high enough for salmon and was sustainable to hold a population. • However, we didn’t have a proper method of measuring silt and suspended sediment, so our conclusions are inconclusive!

  8. Differences • If we had another chance we would measure the silt and suspended sediment in the water to see if it would effect it differently

  9. Citations • Carter, Katherine. Environmental Scientist California Regional Water Quality Control Board North Coast Region.

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