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RHUM30 - Percentage of stream corridor buffered to 30 meters classified as all human land use The percentage of human use land cover 30 meters adjacent to streams
is calculated by summing the total number of agricultural, urban
and non-natural barren (transitional and mines/quarries) 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. This metric
can be used to identify areas near streams which may be more susceptible
to non-point source pollution, pesticides, excess fertilizer and
soil erosion which may result in stream and lake sedimentation or
eutrophication. |