Construction of ombrian curves using the Hydrognomon software system

T. Tsitseli, D. Koutsoyiannis, A. Koukouvinos, and N. Mamassis, Construction of ombrian curves using the Hydrognomon software system, Facets of Uncertainty: 5th EGU Leonardo Conference – Hydrofractals 2013 – STAHY 2013, Kos Island, Greece, doi:10.13140/RG.2.2.34517.01762, European Geosciences Union, International Association of Hydrological Sciences, International Union of Geodesy and Geophysics, 2013.



Hydrognomon is an application for the analysis of hydrological data and includes several applications for time series processing, such as time step aggregation and regularization, interpolation, regression analysis and infilling of missing values, consistency tests, data filtering, graphical and tabular visualization of time series, etc. Both its source code and the executable program are freely available. The new version of Hydrognomon includes a module for the construction of ombrian (intensity-duration-frequency) curves. It is based on a mathematical framework that expresses ombrian curves with unified relationships giving rain intensity in terms of duration and return period, either for a single gauging station or for a station group over a specified area. In the latter case, it supports either single parameters set or spatially varying parameters. The framework is completed with raw rainfall data processing, data management and storage, graphical user interface, and output data graphs and export facilities.

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