Hydraflow Express in Civil 3D is a valuable tool for hydrology design and analysis, helping engineers:br br 1. Calculate runoff: Determine stormwater runoff rates and volumes.br 2. Design stormwater systems: Size pipes, inlets, and other infrastructure.br 3. Analyze hydraulic performance: Evaluate system capacity and potential flooding.br br Hydraflow Express simplifies hydrology design and analysis, enabling engineers to:br br 1. Optimize stormwater system designbr 2. Ensure compliance with regulationsbr 3.