Arc Hydro is a set of tools and data models that operates from ArcGIS to assist in the development of geospatial and temporal data analysis.
Use Arc Hydro to delineate and characterize raster and vector watersheds, define and analyze hydrogeometric networks, manage time series data, and configure and export data to numerical models.
If you have ArcGIS Pro, you can enjoy ArcHydro’s tools for free.