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RBAR90 - Percentage of stream corridor buffered to 90 meters classified as barren

The percentage of barren land cover 90 meters adjacent to streams is calculated by summing the number of barren rock land cover cells underneath stream segments in the 3 km grid cell reporting unit and within a three cell buffer (90 meters) and dividing by the stream corridor's total land area (all cells 90 meters adjacent to streams minus those classified as water). Cells inside the buffer zone but outside of the grid cell boundary are ignored. This metric can be used to identify areas near streams which may be more susceptible to water run off which may in turn cause soil loss and stream and lake sedimentation.