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FW Farmed Wetlands. USDA/NRCS classification of wetlands subject to NFSA restrictions. Wetlands that were drained, dredged, filled, leveled, or otherwise manipulated before December 23, 1985 for the purpose of, or to have the effect of, making the production of an agricultural commodity possible and continue to meet specific wetland hydrology criteria.

FWP Farmed Wetland Pasture or Hayland. USDA/NRCS classification of wetlands subject to NFSA restrictions. Wetlands that were manipulated and used for pasture or hayland, including native pasture and hayland, prior to December 23, 1985, still meet specific wetland hydrology criteria, and are not abandoned; or are in agricultural use and met FWP criteria on December 23, 1985.

Gleyed A soil characteristic that describes soils with a blue-grey or greyish appearance.

Hydric Soil 1). Wetland soils. 2). A soil that is saturated, flooded, or ponded long enough during the growing season to develop anaerobic conditions that favor the growth and regeneration of hydrophytic vegetation.

IDNR Illinois Department of Natural Resources. Illinois state agency given the responsibility of protecting and managing the natural resources of the state.

IEPA Illinois Environmental Protection Agency. Illinois state agency given the responsibility of protecting the quality of the environment and human health.

Intermittent Riverine subsystem consisting of regions where the channel contains flowing non-tidal water for only part of the year. When water stops flowing through this subsystem it may remain in isolated pools or be entirely absent above the surface.

Inundated To be covered by water.

IWPA Interagency Wetlands Policy Act of 1989. State legislation establishing IDNR's primary authority over wetlands.
Lacustrine Wetland system associated with open water bodies such as lakes, reservoirs, and impounded rivers.

Limnetic Lacustrine wetland subsystem consisting of the area from the shoreline to a depth of 2 meters below low-water, or to the extent of non-persistent emergents (if they grow at greater depths).

Littoral Lacustrine subsystem consisting of all deepwater habitats.

Lowflow The average minimum flow of a stream.

Lower Perennial Riverine subsystem consisting of regions with a low gradient, slow water velocity, no tidal influence, and a constant flow of at least some water throughout the year.

Macrophyte A plant capable of being viewed with the naked eye which has specialized vascular tissues.

Mottles Blotches, streaks, and spots of different colors or shades.

MOA Memorandum of Agreement. A legally binding agreement reached between government entities concerning activities surrounding a given issue.

Modifiers Wetland descriptors that represent specific details about water regimes, substrate types, water chemistry, or human alterations.

Natural Wetlands Wetlands that existed before human modification of their characteristics or of the surrounding environment.

NAWMP North American Waterfowl Management Plan. Federal program to develop regional plans for the protection of wetland habitat critical to migratory waterfowl populations.

NFSA National Food Securities Act. Federal law passed in 1985 to help manage production on agricultural lands.

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