Laserfiche WebLink
<br />July 1993 <br />-13- <br />923-2515 <br />Landscapes with the following characteristics were mapped as subirrigated aeeas: <br />- Presence of obligate and facultative wetlands plants; <br />- Presence of soils with hydric component; <br />- Seasonal high water table in the effective rooting depth of the plants; <br />- Location adjacent to perennial streams with channel incised to 60" or less, or <br />adjacent to intermittent stream with channels incised to 60" or less, but with <br />water ponded or saturated soils on the stream bottom and bank. <br />The identification of subirrigated areas in crop production aeeas was based upon the above <br />described soils, topographic, and hydrology data plus discussions with the local farmer regazding <br />his observations on the ground and surface water hydrology and crop performance relative to <br />• soil moisture conditions. <br />Wetlands: Vegetation, soil, and hydrology criteria in the U.S. Army Corps of Engineers <br />(Corps) Federal Manual for Identifying and Delineating Jurisdictional Wetlands (198'n were, in <br />general, used to identify and map wetlands. Specifically, wetlands were defined as areas having <br />all three of the following conditions: <br />- Vegetation - A prevalence of obligate wetlands, facultative wetland, and <br />facultative plants as determined by field observation; <br />- Soils -Soils with a hydric component as determined from a recent (1991) SCS <br />soils mapping; <br />- Hydrology -Inundated or saturated soils as determined through visual observation <br />or evidence of inundation or saturation earlier in the growing season, i.e., <br />drainage patterns, drift lines, sediment deposits, water marks, etc. <br /> <br />Golder Associates <br />