Soil Run-off in Koko Marina Arianna Ondo, Sascha Williams, Francesca Diaz Hahaione Elementary Grade 6.

Observations

We saw dirt flying in the wind and flowing in the marina at construction sites. When it rained in a residential area we saw fertilizer that someone poured on their lawn going into the water.

Research QuestionIs water in certain areas of Koko Marina more polluted by soil run-off than other areas?

Backround Information • Turbidity and transparency is a test of water

clarity and suspended materials. • Soil run-off blocks light for animals, plants, and

ruins the whole habitat by changing temperature, ph, and turbidity because the dirt covers the bottom.

• Pflueger was charged $5,000-$50,000 for doing construction that led to muddy rainwater running into Pila’a Bay.He polluted the water so bad he violated the law.

HypothesisIf there is construction in the middle part of Kokomarina then, the water near the construction sites will be more turbid and less transparent than the areas farther away because construction dust and debris will add to soil run off.

Materials1. Turbidity test kit2. Transparency tube3.Pencil4.Paper5. Gloves6. Gallon buckets7. Beakers (scoop or cup)8. Umbrella9. Calculator10. Testing Sites (Residential, Construction,ETC.)

Procedure-Transparency1. Drop bucket with rope into water, then pull out 2. Take beaker and scoop water from the bucket (make sure your in the shade)3. Pour slowly into tube 4. Repeat until you can’t see the black and white disk any more5. Then read the number of cm where the water level is at and write down6. Repeat steps 1-5 until you have tested all sites 6-10 times

Procedure-Turbidity1. Fill the bucket with water up to the line 2. Compare the disk in the bucket to the turbidity chart 3. Write down the results in JTU 4. Repeat steps 1-3 until you have done all sites 6-10 times

Testing Sites

• Boat Harbor• Hancock Landing• Pizza Hut• Mariner’s Cove• Post Office• Agriculture• Koko Isle• The Penninsula

Testing Sites

Results and Analysis of Koko Marina Turbidity

Analysis-Mariner’s Cove is the highest in turbidity than the other sites. This maybe because it’s by a sewer treatment station or because it’s by a canal.The boat harbor, agriculture and post office were all 40 JTU, but don’t have similar character-eristics. All of the settled places like residential and commercial sites aren’t very turbid.

40

26.6 26.6

100

40 40

26.633.3

0

10

20

30

40

50

60

70

80

90

100

BoatHarbor

Hancocklanding

Pizza Hut Marinerscove

Post office Hahai'oneValley

Koko Isle ThePenninsula

Results and Analysis of Koko Marina-Transparency

44

90.6

75

29.8

75.3

50.8

68

34.3

0

10

20

30

40

50

60

70

80

90

100

Boat Harbor HancockLanding

Pizza Hut Mariner's Cove Post Office Agricultural Koko Isle Penninsula

Analysis- The lowest places are the boat harbor, mariner’s cove,and the Penninsula because they are all 50-30 cm.The higher places are Hancock landing, Pizza hut, Post office, and Koko Isle because they are all settled places from 90-60 cm. Everything that is low has some way of polluting the water. All high places are settled and don’t erode as much.

Conclusion

Our hypothesis was correct in a certain way. Construction lets lots of soil run-off into the marina and it will effect it’s habitat in a bad way. But it’s not the only problem. One area had very bad results and many reasons for the results being that way it could be the sewer plant by the area or the canal. Let’s just say Koko Marina has many problems that need to be fixed or our data might be the one that needs to be fixed. This leads to our next step.

Next Step

• Test more construction sites to see if the data was good and that the development will hurt the marina

• Send letters to the Koko Marina board showing our studies and telling them they need to find a way to stop the runoff from the construction sites and sewers (like replacing pipes)

The End

Any questions?