RIVER DELINEATION MODELS OF THE VIRGIN RIVER, UTAH FROM NAIP IMAGERY AND A DIGITAL ELEVATION MODEL FROM 2016 USING LAND CLASSIFICATION AND FLOW ACCUMULATION

DEM-Based FA Polyline Model

DEM to Polyline Workflow

Within ArcGIS Pro, ModelBuilder was used to produce polylines from the DEM. This workflow begins with a LiDAR based digital elevation model to produce flow direction, then sinks, and then uses the DEM and sinks output as parameters for producing a flow accumulation raster with the geoprocessing tool Derive Continuous Flow. Finally, it reclassifies the pixels as zero or one to single out the flowlines.