Susquehanna Shale Hills Critical Zone Observatory Tree Survey

Trees in the Shale Hills watershed were originally surveyed in 2008, with the addition of a sample of tree height data and updated diameter measurements in 2012 and 2016. Tree survey data includes an assigned tree number with associated data including species, diameter, height (when available), and GPS coordinates. Diameter measurements in 2008 and 2016 were taken 1.37 meters high on the upslope side of the tree. Diameter measurements in 2012 were taken at breast height on the downhill (tagged) side of the tree.