CD Closed Depression Area-- low area of a field with no outlet that accumulates or receives runoff. In times of spring meltdown or heavy rainfall, runoff channels may form and deliver runoff water to closed depressions.
DEM Digital Elevation Model-- generic term for digital topographic data in all its various forms.
DSM Digital Surface Model-- image based upon the Lidar collected in April 2021. Surface model developed by the Illinois State Geologic Survey.
DTM Digital Terrain Model-- image based upon the Lidar collected in April 2021. Terrain model developed by the Illinois State Geologic Survey.
HEDEM Hydro Enforced DEM-- enables hydrologic models to simulate flow under bridges and through culverts by modifying the elevations of artificial impediments like bridges and culverts.
Intensity can be used to aide in identifying impervious surfaces and vegetation
Infrared In this imagery vegetation appears in shades of red, developed areas are in shades of blue and soils are in different shades of brown.
Lidar An instrument that emits thousands of laser pulses, then measures the time difference which gets converted to distance. The ground and things on the ground can be measured.
RUSLE Revised Universal Soil Loss Equation. RUSLE is an index method having factors that represent how climate, soil, topography, and land use affect rill and interrill soil erosion caused by raindrop impact and surface runoff.
Soil Erosion An estimate of soil erosion using RUSLE was generated and used as the basis for potential areas.