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RWETL30 - Percentage of stream corridor buffered to 30 meters classified as wetland The percentage of wetland cover within 30 meters of a stream is
calculated by summing the number of wetland land cover cells underneath
stream segments in the 1 km grid cell reporting unit and within
a one cell buffer (30 meters) and dividing by the stream corridor’s
total land area (all cells 30 meters adjacent to streams minus those
classified as water). Cells inside the buffer zone but outside of
the grid cell boundary are ignored. Forests and wetlands act as
filters, removing pollutants from runoff before it enters streams.
Forests and wetlands also provide habitat for a wide variety of
valuable plant and wildlife species. |