2007 Nason Creek Floodplain Vegetation Assessment

摘要

The objective of the 2007 riparian vegetation assessment is to provide an understanding of the present vegetation conditions to be utilized for U.S. Bureau of Reclamations Nason Creek tributary- and reach-scale assessments. A team of ecologist conducted field sampling and GIS analyses of remotely sensed data to create a GIS file containing polygons of vegetation units. Data from the vegetation assessment, along with other components of the geomorphic assessment, will be used for planning and prioritizing salmon recovery efforts in Nason Creek between river miles (RM) 4 and 14. In August 2007 riparian vegetation was sampled throughout the assessment reach. Data collected included canopy cover and height for overstory and understory species and herbaceous species. These data were used in a GIS along with aerial photography and Light Detection and Ranging data to interpret riparian vegetation and create vegetation units within the reach. The vegetation units were classified into the Oregon/Washington U.S. Forest Service vegetation units for consistency with previous mapping available for lower Nason Creek RM 0 to 4.