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This equation solves for W
(POINT), which represents the total phosphorus entering Long Pond North in
kg/year. In order to calculate
W, export coefficients (Ec) were first derived (POINT). These coefficients are subjective,
so low, best, and high estimates were generated to provide confidence
intervals for possible error resulting from natural fluctuations and
estimation.
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Each of these export
coefficients was multiplied by their respective area of the land use
(POINT).
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This calculation in the
first parentheses was performed separately on all 14 of the specific
land-use types that have been assigned in the LPN watershed (POINT).
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Next, another Phosphorus
input source is the atmosphere
(POINT) whose export coefficient was multiplied by the lake area.
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The amount of phosphorus
released from bottom sediments is calculated with this term (POINT).
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The # of capita years
(POINT) considers the average number of residence occupants to be 2.54 and
average duration of occupancy to be 95 days for seasonal residents and 355
days for yearly residents. This
is multiplied by the export coefficient for shoreline septic systems and
non-shoreline septic systems (POINT).
The soil retention value for local soils is SR (POINT).
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PSI refers to the point
source inputs of great pond, beaver pond, and whittier pond.
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