Gridded Rainfall Design Values in Slovakia

This dataset provides gridded design rainfall depth quantiles [mm] for the territory of Slovakia, derived from the nonlinear intensity–duration–frequency (IDF) model developed by Urcikán (1980) and described in Urcikán & Impriška (1986), calibrated on a network of 68 ombrographic rain gauges in Slovakia. The model relates rainfall depth to duration and return period through seven station-specific parameters (fitted per gauge). The presented dataset is a gridded product that uses station-level quantiles interpolated using an elevation-detrended radial basis function approach: (1) station elevation sampled from a digital elevation model; (2) a linear regression of quantile against elevation fitted per combination to capture the orographic signal; (3) residuals from this trend interpolated spatially with a thin-plate-spline radial basis function; (4) the final grid reconstructed as the elevation trend plus the interpolated residuals, masked to the Slovak Republic national boundary. Coverage: 9 rainfall durations: 5, 10, 15, 20, 30, 40, 60, 120, 180 minutes 8 return periods: 1, 2, 5, 10, 20, 30, 50, 100 years Grid specification: Projection: S-JTSK / Krovak East North, EPSG:5514 Resolution: 500 m (901 × 453 cells) Extent: X −603,500 to −153,000 m, Y −1,347,000 to −1,120,500 m; masked to the Slovak Republic national boundary Format: GeoTIFF File naming: IDF_grid_T{T}_D{duration}min.tif (e.g. IDF_grid_T100_D60min.tif) Units: mm (rainfall depth for the given duration and return period) To get more details about the product, send an email to [e-mail] Cite as: Onderka, M. (2026). Gridded Rainfall Design Values in Slovakia (Version 1) [Dataset]. Regionálny klimatologický inštitút. https://doi.org/10.5281/zenodo.22960847 References: Urcikán P. (1980). Matematický model intenzít krátkodobých náhradných dažďov, Vodohosp. Čas., 28, č. 5, s. 449–471. Urcikán P., Impriška L. (1986). Stokovanie a čistenie odpadových vôd. Tabuľky pre výpočet stôk. ALFA, SNTL. pp. 240. Acknowledgement: This research was supported by the National Supercomputing Centre (nscc.sk) through the provision of high-performance computing infrastructure. Project title: "CMIP6 Climate Change Scenarios for Central Europe: Bias correction and derivation of hydroclimatological Variables" (Project code: p2025-26-t). Disclaimer: This dataset represents a scientific research output provided "as is," without warranty of any kind, express or implied. The creators assume no liability or responsibility for any errors, omissions, or direct, indirect, or consequential damages resulting from the use, interpretation, or misuse of these data.