Cumulative Impacts
Although the impacts of each individual stressor are important to
consider, the geographic areas most at risk are those which are
subject to multiple stresses. Although we can't yet quantify the
cumulative impacts of multiple stresses across a region, we can
identify areas where the possibility of cumulative impacts is
high.
This map shows all four stressors from the previous page
(nitrogen, sediment, aquatic exotic species, nitrate deposition).
The individual stressor information has been combined using an
integration method that counts the number of times that a watershed
is among the worst 20% (the Worst Quintiles integration method). All
stressors are equally weighted.
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