Area	North Fork Garcia
Topic	Land Cover: USFS Veg Size in Riparian for North Fork 1994

 

Caption:  This bar chart shows vegetation size classes in the riparian zone of the North Fork Calwater Planning Watershed. The riparian zone encompasses a distance of 90 meters (292.5 feet) on either side of the stream channel. This planning watershed had 41% of the riparian in medium-large and greater trees, 53% in small-medium and smaller trees and 6% in non-forest. These ratios show smaller average diameter trees than the upland vegetation (previous Topic), but riparian areas naturally have a larger diameter because of soil deposits and moist conditions. This suggests that logging has taken place in riparian zones as well. The information was derived from a 1994 Landsat image by the U.S. Forest Service. This analysis technique calculates averages of vegetation stands at a one-hectare scale, and therefore is accurate at the stand rather than individual tree level. Click on InfoLinks for more information. Vegetation is classified according to diameter at breast height (DBH): Very 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.

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To download the table with the chart's source data, click veg_usfs_rip_garcia_source.dbf (size 2,647 bytes)
 
 

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