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giswr > hydro

ArcGIS Hydro Data Model

The ArcGIS Hydro data model (Arc Hydro) is a data model for representing hydrologic features in Geographic Information Systems (GIS). The goal was to support a basic cartographic representation of surface water features while enabling the integration of those features with hydrologic and hydraulic simulation models. Key elements of Arc Hydro include the HydroID which is used to link related features, and the association of features such as monitoring points with time series data.

Arc Hydro was officially released in 2001, and is described in the book Arc Hydro: GIS for Water Resources. This book is available from ESRI Press (

Arc Hydro is often utilized in Dr. David Maidment's classes at The University of Texas at Austin. For the complete class library, see

For the latest Arc Hydro tools and tutorials, please visit the ESRI Hydro Data Model page at



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Bureau of Engineering Research
last updated September 9, 2004