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EM: Emergent - Characterized by erect,�rooted, herbaceous hydrophytes, excluding mosses and <br /> lichens. This vegetation is present for most of the growing season in most years. <br /> Subclasses include: EMl =Persistent (plants that normally remain standing at least until the <br /> beginning of the next growing season), and EM2 =Nonpersistent (plants which fall to the surface of <br /> the substrate or below the surface of the water at the end of the growing season). <br /> FO: Forested -Woody vegetation greater than 6 meters (20 feet) tall. <br /> Subctass determination is based on which type represents more than 50 percent of the areal canopy <br /> coverage during the leaf-on period and Subclasses include: FOl =Broad-leaved Deciduous, F02 = <br /> �Ieedle-leaved Deciduous, F03 =Broad-leaved Evergreen, F04= Needle-leaved Evergreen,FO� _ <br /> Dead, F06 =Deciduous, and F07 =Evergreen. <br /> SS: Scrub/Shrub -Woody vegetation less than 6 meters (20 feet) tall. The species include true <br /> shrubs, young trees (saplings) or trees that are small or stunted because of environmental conditions. <br /> Subclass determination is based on which type represents more than 50 percent of the areal canopy <br /> coverage during the leaf-on period and include: SS1 =Broad-leaved Deciduous, SS2 = <br /> Needle-leaved Deciduous, SS3 = Broad-leaved Evergreen, SS4=Needle-leaved Evergreen, SSS = <br /> Dead, SS6=Deciduous (used if deciduous woody vegetation cannot be identified on aerial <br /> photography as either Broad-leaved or Needle-leaved), and SS7 = Evergreen (used if evergreen <br /> woody vegetation cannot be idenrified on aerial photography as either Broad-leaved or <br /> Needle-leaved). <br /> UB: Unconsolidated Bottom-Includes all wetlands and deepwater habitats with at least 25 percent <br /> cover of particles smaller than stones (less than 6-7 cm.), and a vegetative cover less than 30 percent. <br /> 4.1.4.4 Water Regime - <br /> Precise description of hydrologic characteristics requires detailed l:nowledge of the duration and <br /> timin� of surface inundation, both yearly and long-term, as wel] as an understanding of groundwater <br /> fluctuations. Because such information is seldom available, the water regimes that, in part, <br /> determine characteristic wetland and deepwater plant and animal communities are described here in <br /> only general terms (Cowardin, et al., 1979). Water regimes are grouped under two major categories, <br /> Tidal and Nontidal. The Tidal Water Regime does not occur in the District so is not described here. <br /> \\fred\wp123�27�D06�Reports�'inal Report\Wetland mgmt�lan_dft011503.doc 4_g <br />