Dissolved Oxygen in Kuapa Pond

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Dissolved Oxygen in Kuapa Pond

• Presented By
• Ashley Short, Crystal Aloisio,
• Yayun Hsueh
• Hahaione School
• Grade 6

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Research Question

• How does non point source pollution and animals
  and plants living in the marina affect the
  percent saturation of dissolved oxygen?

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Background Research

• 3o years ago Kaiser Development dredged Kuapa
  Pond.
• Hawaii Kai was first owned by Bernice P Bishop
  after the monarchy government.
• Hawaii Kai or Kuapa Pond used to be a fishpond.
• Hawaii Kai including Kuapa Pond, covers 523 miles
  ranging from the area inward from Maunalua and
  just west of the pond, the foothill of Koko Head
  Crater to Kaluanui Ridge.
• Dissolved Oxygen is necessary for a body of water
  to sustain life.
• Normally a higher dissolved oxygen level
  indicates better water quality.
• If the levels are to low some marine plants and
  animals may not be able to survive.
• In an area where organic matter is decaying,
  there may be a lower amount of dissolved oxygen
  because bacteria require oxygen to decompose
  organic matter, therefore resulting in lower
  levels of oxygen.

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• Water near a sewer discharge plant may also have
  low dissolved oxygen levels.
• Non point source pollution is pollution that
  comes from many indirect sources.
• Non point source pollution is caused by rainfall
  moving over the ground and as the runoff moves,
  it picks up natural and man- made pollutants.
• The solution to Pollution is Dilution. That was
  an old saying that people thought was true.
• Now with research we have found that it is not
  true.
• They thought the sea was infinite so the
  concentration of pollution would not increase.
• Really the ocean is finite so every time
  pollution enters the water, the concentration of
  pollution increased.

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Hypothesis

• If water flows from the mountain to the sea and
  there is non point source pollution in that
  water, then the amount of dissolved oxygen will
  decrease in the lower part of Kuapa Pond, because
  the non point source pollution will kill the
  marine plants and animals resulting in
  decomposition of organic matter.

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Materials

• Pair of plastic gloves.
• Eye goggles.
• Dump bucket with cover.
• Thermometer.
• 10 ml plastic vial with cap.
• Lamot pills test kit. (dissolved oxygen.)
• Ampoule test kit. (dissolved oxygen.)
• Distilled water in squirt bottle.
• Plastic Cups.
• Clip board and pencil.
• Data Chart.

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Procedure

• Pills
• Collect a water sample.
• Completely fill vile with sample water.
• Drop two dissolved oxygen test pills into the
  water.
• Cap and invert continuously for 5 minutes.
• Collect and compare data to indicator chart.
• Record data on data chart.
• Repeat steps 1-6 at least 6 more times.

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Ampoules

• Collect a water sample.
• Fill vial to line with sample water.
• Place one ampoule in vial.
• Crack the tip of the ampoule and let the
  indicator liquid change color.
• Remove the ampoule and slowly invert for two
  minutes.
• Collect and compare data to indicator chart.
• Record data on data chart.
• Repeat steps 1-7 at least 6 more times.

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Data and Observations

• Observations
• There were plants and animals living in the
  marina.
• Lots of boats.
• The water is was very merky
• There was lots of leaves in the water.
• There was oil in the water

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Data
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Analysis

• We observed that there was non point source
  pollution in the water. The non point source
  pollution could be killing the marine plants and
  animals causing a lower amount of dissolved
  oxygen. Looking at the data the marina by Pizza
  Hut had the most dissolved oxygen. This shows
  that there is most likely less non point source
  pollution, which means less decomposition of
  organic matter. The order from highest levels to
  lowest levels is Pizza Hut, Mariners Cove, Boat
  Harbor, Agriculture Site, and the Post Office.
  Post Office, being the lowest would most likely
  have more non point source pollution killing
  marine animal and plant life, then resulting in
  decomposition of organic matter which lowers
  dissolved oxygen levels.

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Conclusion

• Looking at the data our hypothesis was wrong. We
  predicted that there would be lower levels in the
  bottom pond. They were higher in the bottom and
  lower in the top. We think that the non point
  source pollution did not exit the top pond
  because its has only one place to exit. If this
  did happen then the non point source pollution
  killed the marine plants and animals resulting in
  decomposition of organic matter.

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Next Steps

• If we could further our experimenting, we would
  go back and test for nitrates as well. Then we
  would do research on nitrates and the connections
  to dissolved oxygen. We would also research even
  more in depth about Kuapa Pond. If the nitrate
  and dissolved oxygen levels were low, we would
  research and see another variable of the
  dissolved oxygen level and then do tests to see
  what is making the dissolved oxygen levels lower.

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PicturesBefore Construction
http//www.hawaiikaimarina.com/images/nostalgia/ha
waiikai1974_1024.JPG
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After Construction
http//www.808golf.com/oahu/pointsofinterest/easto
ahu/images/p5.jpg
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The End
Any questions ?