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Hydrognomon ( Ὑδρογνώμων)

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Hydrognomon is a free software application for the analysis and processing of hydrological data, mainly in the form of time series. It is provided under the terms of the GNU GPLv3 License. Hydrognomon is part of the openmeteo.org framework, where source code can be obtained.


Key features are:

  • Tabular representation of data in many forms.
  • Analysis of several time steps ranging from minutes to decades or centuries.
  • Tools for statistical analysis such as distribution functions fitting, multi regression analysis, statistical forecasting, monte carlo, ombrian curves (IDF analysis).
  • Specific tools for analyzing hydrological data, e.g. evapotranspiration calculations, water basin model (lumped), stage-discharge curves, etc.


Hydrognomon has been developed mainly to serve the research activities of the ITIA research group which is responsible for the design and maintenance of the software. Hydrognomon is also one of the software supporting the "Hydroscope" - National Databank for Hydrological and Meteorological Information.


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Use the navigation menu on the top of the page to access the free download location and relative help material.


Current version is 4.1.0.26, released on March 30th, 2012.

Web page last updated on March 30th, 2012 (New software version). For further inquires you may contact us by sending an e-mail to info@hydrognomon.org