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ABSTRACT |
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TITLE: |
Integrated Database Strategies for Wetland and Soil Resource Assessment |
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AUTHOR(S): |
J.L. Arndt - jarndt@petersonenv.com D.L. Krieger M.E. Timpson |
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Soils and resources along extensive Rights
of Way (ROWs) are efficiently and economically
assessed using a coordinated group of NRCS computerized database products
that provide information on soil classification, soil distribution, soil
physical and chemical characteristics, and limitations for various uses. The
digital approach to assembling and analyzing soils information is the only
practical method to use for large, linear construction projects extending up
to one thousand miles in length. The routes of the proposed projects are
digitized and overlain onto the STATSGO/SSURGO spatial database in a GIS. The
specific ROW length contained within a particular soil map-unit polygon is
digitally obtained by a query of the spatial database for beginning and
ending mileposts. ROW acreage for each polygon is then obtained by
multiplying ROW length by an assumed ROW width. Individual polygon acreages
are summed to obtain a total ROW acreage for each soil map-unit. Acreages of
component soil series in the map unit are obtained by multiplying the
percentage of each component soil series in the map unit by the total
map-unit acreage. Soils are grouped into tailored, specific interpretative
classes and evaluated via database queries according to characteristics that
could affect construction or increase the potential for soil impact. The
percentage of each map unit within a specific interpretative grouping is
obtained by summing the percentages of all map-unit component soil-series
placed in the interpretative group. Total state acreage for each
interpretative group is obtained by summing the individual map unit acreage. |
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