Laserfiche WebLink
Hydrophytic Vegetation (VVet[and Vegetation) <br /> Wetiand vegetation is defined in the 1987 Manua( as "Tlie sum total of macrophytic plant life <br /> growing in watec• or on a substrate that is at least periodically deficient in osygen as a result of <br /> excessive water content. When hydrophytic vegetation comprises a community where indicators <br /> of hydric soils and wetland hydrology also occur, the area has wetland vegetation." in more <br /> standard terms, some plants are more adapted to growing within inundated or saturated soil. <br /> Based on literature records and professional experience, a panel of expeirts compiled a List of <br /> plant species and assigned each a hydraphytic status (described below and includes five major <br /> cfasses of pf•obability of a plant occurring within a �vetland}. <br /> In terms of delineation there is a gradiet�t of plant species that at•e adapted to "growing ifl water , <br /> or on substrate that is at least periodically deficient of oxygen". Fieldwork associated with <br /> wetland delineations includes a procedure (the 50/20 Rule, for determination of dominance), <br /> which is also outlined in the 1987 i�tanuai, by which to dete�•mine if hydrophytic p(ant species , <br /> dominate the vegetation at a given location. This procedure has been used for the wetland <br /> delineation at the subject parcel of this report. <br /> Hydric Soil � <br /> Detined in the 1987 Manual as "A soil tliat is saturated, tlooded, or ponded long enough during <br /> the growing season to develop anaerobic conditions that favor the growth and regeneration of <br /> hycirophytic vegetation. Hydric soils that occur in areas having positive indicators of ' <br /> hydrophytic vegetation and wetland hydrolo�y are wetland soils." <br /> For the purposes of delineation of wetlands, soils cannat be viewed without digging pits or <br /> extracting soil using an auger. Therefore, transects of soil samples are taken from perceived � <br /> upfand to perceived �vetlands a(ong a transitional boundary. Tliere are specific color indicators, '. <br /> � <br /> textures, and depth requirements in the sail that are reviewed in order to determine �i�hether ; <br /> hydric soils occur at a given point or not. After a transect of soil samples has been taken, upon <br /> consideration of vegetation and indicators of appropriate hydroloDy a working prototype for the <br /> given wetland is developed by the deiineator. The wetland delineator then uses this working <br /> prototype to comp(ete the location of the remainder•of the wetland boundary, unless the wetland <br /> is large enough or the landscape features (vegetation or topography) change enough to watTant ' <br /> additional transect samples. <br /> � <br /> ; <br /> A-3 <br />