[Ord. 93-1, 2/8/1993, § 3]
As used in this part, the following terms shall have the meanings indicated, unless a different meaning clearly appears from the context:
ALLUVIAL SOILS (FLOODPLAIN SOILS)An azonal great group of soils, developed from transported and relatively recently deposited material (alluvium), characterized by a weak modification (or none) of the original materials by soil-forming processes).
EROSION(1) The wearing away of land surface by running water, wind, ice, chemical or other geological agents.
(2) Detachment and movement of soil or rock fragments by water, wind, ice or gravity.
GRADE(1) The slope of a road, channel or natural ground.
(2) The finished surface of a canal bed, roadbed, top of embankment or bottom of excavation; any surface prepared for the support of construction like paving or laying a conduit.
(3) To finish the surface of a canal bed, roadbed, top of embankment or bottom of excavation.
RUNOFF (HYDRAULICS)That portion of the precipitation and a drainage area or watershed that is discharged from the area in stream channels; types include surface runoff or seepage.
SEDIMENTSolid material, both mineral and organic, that is in suspension, is being transported, or has been moved from the area in stream channels; types include surface runoff, groundwater runoff or seepage.
SLOPEDegree of deviation of a surface from the horizontal usually expressed in percent or degrees.
SOIL DRAINAGEA condition of the soil, referring to the frequency and duration of periods when the soil is free of saturation.
SUBSOILMaterial immediately underlying topsoil, consisting of, but not limited to, either singly or in combination, clay, sand, gravel or crushed rock, but not including bedrock or other impervious surface, as more fully defined and set forth in the most recently adopted and approved Montgomery County Soil Survey, exclusive of the A Horizon.
TOPSOILThe top most layer of ground cover containing humus in some concentration capable of supporting plant growth as more fully defined and set forth in the most recently adopted and approved Montgomery County Soil Survey under the designation of the A Horizon, but not including subsoil as previously defined.
WATERCOURSEA natural drainage route or channel for the flow of water.