Percent-slope classes to characterize the unsaturated zone in North Carolina
Dataset Identification:
Resource Abstract:
This web site contains the Federal Geographic Data Committee-compliant metadata (documentation) for digital data produced
for the North Carolina, Department of Environment and Natural Resources, Public Water Supply Section, Source Water Assessment
Program. The metadata are for 11 individual Geographic Information System data sets. An overlay and indexing method was used
with the data to derive a rating for unsaturated zone and watershed characteristics for use by the State of North Carolina
in assessing more than 11,000 public water-supply wells and approximately 245 public surface-water intakes for susceptibility
to contamination. For ground-water supplies, the digital data sets used in the assessment included unsaturated zone rating,
vertical series hydraulic conductance, land-surface slope, and land cover. For assessment of public surface-water intakes,
the data sets included watershed characteristics rating, average annual precipitation, land-surface slope, land cover, and
ground-water contribution. Documentation for the land-use data set applies to both the unsaturated zone and watershed characteristics
ratings. Documentation for the estimated depth-to-water map used in the calculation of the vertical series hydraulic conductance
also is included.
Citation
Title Percent-slope classes to characterize the unsaturated zone in North Carolina