Definitions. As used in this section, the following terms shall have
the meanings indicated:
ALTERATION OF TERRAIN
Any activity proposing to dredge, excavate, place fill, mine,
transport forest products or any activity proposing to significantly
alter the characteristics of the terrain, in such a manner as to impede
the natural runoff or create an unnatural runoff.
BASAL AREA
The cross-sectional area of a tree measured at a height of
4 1/2 feet above the ground, usually expressed in square footage
per acre for a stand of trees.
BENCHED OR TERRACED SLOPE
A land-filling practice along a slope that results in a relatively
horizontal surface that is greater than 10 feet wide as measured from
the intersection with the original slope.
CLEAR-CUTTING
Harvesting all the trees in one area at one time, a practice
that can encourage fast rainfall or snowmelt runoff, erosion, sedimentation
of streams and lakes, and flooding, and destroys vital habitat. (http://www.epa.gov/OCEPAterms/cterms.html)
EROSION
The wearing away of the ground surface as a result of the
movement of wind, water, ice, and/or land disturbance activities.
LOW-IMPACT DEVELOPMENT (LID)
A land development practice that decentralizes the retention
and detention of stormwater runoff to replicate the surface runoff
hydrologic conditions that existed prior to development activities.
PRECAUTIONARY STEEP SLOPE
Land with a slope that ranges from 15% up to but not inclusive
of 25%. For determining the steep slope category, slope percentages
are rounded to the nearest whole number.
PROHIBITIVE STEEP SLOPE
Land with a slope that equals or exceeds 25%. For determining
the steep slope category, slope percentages are rounded to the nearest
whole number.
SCENIC VISTA
An area in which a view of a particular scenic beauty or
historically significant area is achievable.
SEDIMENTATION
The process by which sediment resulting from accelerated
erosion has been or is being transported from the site of the land-disturbing
activity into a lake, natural watercourse or wetland, or drainageway.
SLOPE
The degree of deviation of a surface from the horizontal,
usually expressed in percent or degrees, or vertical rise over a horizontal
run.
SLOPE INTERRUPTION
A land development practice performed along a slope that
is designed to slow stormwater runoff velocity, dissipate erosive
forces, promote a sheetflow-like surface runoff characteristic, and
trap sediment and soluble pollutants.
STEEP SLOPE
Land with a slope that equals or exceeds 15% and has a slope-length
of 10 feet or greater.
VEGETATIVE COVER
Grasses, shrubs, trees, and other vegetation which holds
and stabilizes soils and resists erosion.