TNT Watershed Analysis Highlights:

• Fast, efficient processing of very large DEMs (gigabytes in size)
• Compute vector flowpaths, watersheds, basins, and ridge lines
• Control drainage network density and basin size using flow accumulation thresholds for outlet, upstream limit, and branching points
• Quickly recompute and save multiple versions of flowpaths and basins using different criteria
• Automatically fill spurious small depressions in DEM and set thresholds to leave larger/deeper depressions unfilled
• Automatically place a drain (null cell) in bottom of unfilled depressions to model their internal drainage
• Compute upstream catchment area and downstream flowpath for specific locations by manually placing seed points in a view of the DEM or by loading them from a vector geodata layer
• Save Watershed results at any time
• Compute hydrologic/geomorphic characteristics of the DEM cells: specific catchment area, compound topographic index (CTI), maximum upstream flow distance, and downstream flow distance
• Compute hydrologic attributes of flowpaths: stream order, elevation drop, average slope, sinuosity ratio, upstream and downstream flow distances, and others.
• Compute hydrologic attributes of catchment polygons: drainage density, basin length, elongation ratio, basin relief, mean stream slope, and many others
• Created segmented flowpath network using elevation or flow accumulation values