 Northern
California Metric Maps
HUCs
- 10 digit U_INDEX
Human Land Use RHUM0
Stream Corridor RHUM30
30 Meter RHUM90
90 Meter N_INDEX
Natural Land Use RNAT0
Stream Corridor RNAT30
30 Meter  RNAT90
90 Meter PBAR
Barren RBAR0
Stream Corridor RBAR30
30 Meter RBAR90
90 Meter PAGT
Agriculture RAGT0
Stream Corridor RAGT30
30 Meter RAGT90
90 Meter PAGC
Cropland RAGC0
Stream Corridor RAGC30
30 Meter RAGC90
90 Meter PAGP
Pasture RAGP0
Stream Corridor RAGP30
30 Meter RAGP90
90 Meter PURB
Urban RURB0
Stream Corridor RURB30
30 Meter RURB90
90 Meter PWETL
Wetland RWETL0
Stream Corridor RWETL30
30 Meter RWETL90 90 Meters PFOR
Forest RFOR0
Stream Corridor RFOR30
30 Meter RFOR90
90 Meter AGTSL5
- Steep Slopes STRMLEN
Stream Length STRMDENS
Stream Density RDLEN
Road Length RDLENCINTE
Interstates RDLENCHIGH
Highways RDLENCROAD
Surface Road RDDENS
Road Density RDDENSCINT
Interstates RDDENSCHIG
Highways RDDENSCROA
Surface Road FNUMBER
Forest Patches FPATDENS
Forest Density FLARGEST
Largest Forest FAVGSIZE
Average Forest PLGP
Proportion of Forest FEDGE210
Forest Edge FCORE210
Forest Interior FEA210
Forest Edge/Total PFF9
Forest Cell PFPTCH9
Watershed/Patch Forest PFTRAN9
Watershed/Transitional PFEDGE9
Watershed/Edge Forest PFPERF9
Watershed/Perforated PFINTR9
Watershed/Interior REGFAC_COUNT
Regulated Facilities MINES_COUNT
Mines POPDENS
Population Density |
RNAT30 - Percentage of stream corridor buffered to 30 meters classified as all natural land use The percentage of natural land cover 30 meters adjacent to streams is calculated by summing the total number of forest, shrub land, grassland, wetland, and bare rock land cover cells underneath stream segments in the watershed 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 watershed boundary are ignored. High amounts of intact natural cover near streams may provide a barrier to some pollutants that would otherwise enter the stream. Forests and wetlands are particularly effective at filtering nutrients and other chemicals from runoff. |
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Environmental Sciences: Northern California
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- Stream Corridor/Natural Land Use 30 Meter Buffer
