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RURB30 - Percentage of stream corridor buffered to 30 meters classified as urban The percentage of urban land cover within 30 meters of a stream
is calculated by summing the number of urban 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. High amounts of urban land indicate
substantial modification of natural vegetation cover and may have
profound effects on wildlife habitat, soil erosion and water quality.
The closer urban land is to a stream the more likely it will have
adverse affects on the stream habitat and water quality. |