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Please note that we are
Excluding the direct inputs and sediment release factors for right now
to focus on the other inputs.
You can see from this figure that the highest remaining percent
contribution of phosphorus in our watershed are atmospheric (POINT),
shoreline residential (POINT), and camp roads (POINT), and shoreline septic
(POINT)
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Atmospheric input at 17% is
from particulate matter in the atmosphere such as from industry and wood
stoves that may occur far from the LPN watershed.
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The other factors are based
on conditions in our watershed.
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Many of the septic systems
around the lake have been recently updated due new development and
conversion from seasonal to year round residency. However, even properly functioning shoreline septic
systems still have the potential to contribute large quantities of
phosphorus based on their proximity to the lake as we see that it
contributes 23% of our phosphorus loading.
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Runoff from camp roads at
15% is also a problem because they are mostly unpaved, located close to the
shore, and often lacking proper drainage or crowning.
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Shoreline residential at
12% has to do with increased development and reduction of buffering systems.
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These are the areas that
should be continued to be monitored and improved in terms of phosphorus
retention.
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