Review of methods of spatio-temporal evaluation of rainfall erosivity and their correct application

•The accuracy of the R factor depends on several aspects discussed in the article.•Using precondition AND emphasizes influence of the significant erosion rainfalls.•For determining rainfall kinetic energy is recommended the exponential function.•Combination with radar data can improve R values spatio-temporal distribution.•The relation of SLR and R values distribution is key aspect of C factor accuracy.