Hydraflow Extensions are now included with AutoCAD Civil 3D. Hydraflow Hydrographs Extension for AutoCAD Civil 3D is a comprehensive solution for watershed analysis and detention pond design, from simple sites to complex watersheds with interconnected ponds.
Hydraflow Hydrographs Extension is used for: Simple site designs. Complex watershed modeling and regional drainage studies. Pre- and post-development studies. Detention pond design. Submitting agency-ready reports.