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   Caption:  This bar chart shows riparian vegetation size classes for Devils Creek Calwater in the Lower Redwood Creek sub-basin.  Riparian vegetation is defined here as 90-meters (300 feet) on either side of the channel.  This planning watershed had 57 percent of the riparian in medium-large and greater size class, 44 percent in small-medium and smaller size class, and 0 percent in non-forest as of 1994.   Click on Picture to see an ArcView screen print of the Calwater Planning Watershed showing riparian vegetation class size.  The information was derived from a 1994 Landsat image by the U.S. Forest Service.  Vegetation is classified according to diameter at breast height (DBH):
Giant = >50" DBH,  V Large = 40-50" DBH, Large = 30-39.9" DBH,  Medium/Large = 20-29.9" DBH,  Small/Medium = 12-19.9" DBH,  Small = 5-11.9" DBH, Non-Forest = No trees, shrubs, grass, bare soil.
This analysis technique calculates averages of vegetation stands and more accurate at the stand rather than tree level.  See Info Links for more information.
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