 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 |
RAGT0 - Percentage of stream corridor classified as all agricultural use The percentage of all agricultural land cover adjacent to streams is calculated by summing the total number of pasture, crop and orchard land cover cells underneath stream segments in the watershed and dividing by the stream corridor's total land area (total number cells underneath stream segments minus those classified as water). Agricultural practices typically employ fertilizers, pesticides and other chemicals that may be transported to streams in water runoff. The closer agriculture is to a stream the more likely related pollutants will enter the stream. Concentrations of pollutants transported into streams are also more likely to be higher when agriculture is closer to streams. Animals grazing in pasture land may decrease vegetation cover possibly leading to increased runoff. Livestock may also impair stream banks by trampling riparian vegetation, which may cause increased sedimentation in the stream. |
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Environmental Sciences: Northern California
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