Floodplain Geomorphons for the Lake Champlain Basin of Vermont

This dataset contains floodplain geomorphons raster layers, developed from DEMs, for the Lake Champlain Basin of Vermont in the northeastern United States. In these layers, we used geomorphons to identify meso-scale topographic units within the 500-year floodplains of reaches in the Lake Champlain Basin of Vermont draining greater than 2 square miles. Geomorphons were identified for the extent of the 500-year floodplain for all reaches in each Hydrologic Unit Code-12 (HUC-12) subwatershed. The geomorphon approach identifies topographic units as one of 10 classes of geomorphons—a classification system for landforms based on generalized 3D shape. The file name for this layer begins with four digits corresponding to the last four digits of the reach’s HUC-12 and ends with “geomorphons_clean.tif”. A second, alternate layer for each HUC-12 was created by consolidating the original 10 classes into three classes (flat, convex, and concave features), providing a simpler way of visualizing floodplain topographic patterns relevant for routing water across the surface. The main channel of the reach was also masked out of the alternate, 3-class version of the layer. The file name for the 3-class layer with the channel masked out begins with the four digits corresponding to the last four digits of the HUC-12 subwatershed code and ends with “geomorphons_mask3cls.tif”. The data are grouped into folders by HUC-8 subbasin.