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Evaluation of discrepancies in spatial distribution of rainfall erosivity in the Czech Republic caused by different approaches using GIS and geostatistical tools

Author

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  • Jiří BRYCHTA
  • Miloslav JANEČEK

    (Faculty of Environmental Sciences, Czech University of Life Sciences Prague, Prague, Czech Republic)

Abstract

The study presents all approaches of rainfall erosivity factor (R) computation and estimation used in the Czech Republic (CR). A lot of distortions stem from the difference in erosive rainfall criteria, time period, tipping rain gauges errors, low temporal resolution of rainfall data, the type of interpolation method, and inappropriate covariates. Differences in resulting R values and their spatial distribution caused by the described approaches were analyzed using the geostatistical method of Empirical Bayesian Kriging and the tools of the geographic information system (GIS). Similarity with the highest temporal resolution approach using 1-min rainfall data was analyzed. Different types of covariates were tested for incorporation to the cokriging method. Only longitude exhibits high correlation with R and can be recommended for the CR conditions. By incorporating covariates such as elevation, with no or weak correlation with R, the results can be distorted even by 81%. Because of significant yearly variation of R factor values and not clearly confirmed methodology of R values calculation and their estimation at unmeasured places we recommend the R factor for agricultural land in the Czech Republic R = 40 MJ/ha.cm/h +/- 10% depends on geographic location.

Suggested Citation

  • Jiří BRYCHTA & Miloslav JANEČEK, 2017. "Evaluation of discrepancies in spatial distribution of rainfall erosivity in the Czech Republic caused by different approaches using GIS and geostatistical tools," Soil and Water Research, Czech Academy of Agricultural Sciences, vol. 12(2), pages 117-127.
    • Handle: RePEc:caa:jnlswr:v:12:y:2017:i:2:id:176-2015-swr
    DOI: 10.17221/176/2015-SWR
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    Cited by:

    1. Jiří Brychta & Miloslav Janeček, 2019. "Determination of erosion rainfall criteria based on natural rainfall measurement and its impact on spatial distribution of rainfall erosivity in the Czech Republic," Soil and Water Research, Czech Academy of Agricultural Sciences, vol. 14(3), pages 153-162.
    2. Jiří BRYCHTA & Miloslav JANEČEK & Alena WALMSLEY, 2018. "Crop-management factor calculation using weights of spatio-temporal distribution of rainfall erosivity," Soil and Water Research, Czech Academy of Agricultural Sciences, vol. 13(3), pages 150-160.

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