The Arc Hydro data model is complemented by a set
of tools for building Arc Hydro-compliant datasets and
running the data model. Arc Hydro tools work within ArcGIS
for Desktop, but some also require the ArcGIS Spatial
Analyst extension. Use Arc Hydro tools to do the following
• Generate and populate an Arc Hydro geodatabase from
vector and raster data sources.
• Establish relationships between core spatial layers.
• Apply geometric networks for upstream and downstream
tracing and resource accumulation.
• Perform advanced water resource functions (e.g.,
watershed delineation and characterization).
• Develop node-link hydro schema.
• Use an XML data exchange framework for data
integration with external models.