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As I mentioned before,
taking measures to reduce external loading, such as keeping up road
maintenance, septic systems, and buffer strips, will help, they can�t do it
alone.
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The amount of phosphorus
coming from the sediments MUST also be addressed, if the goal of reaching 15
ppb is to be met.
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To illustrate this point,
we used the phosphorus loading model to see what would happen if the amount
of phosphorus from roads, septic systems, and residential development was
reduced by 50%.
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Even with this large
reduction of external input, the total amount of phosphorus would only be
reduced by 374 kg/yr, which is only 1/3 of the necessary reduction.
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