Revised determination of the rainfall-runoff erosivity factor R for application of USLE in the Czech Republic
2006
Janecek, M.(Vyzkumny Ustav Melioraci a Ochrany Pudy, Prague (Czech Republic)) E-mail:[email protected] | Kubatova, E.(Ceska Zemedelska Univ., Prague (Czech Republic). Katedra Biotechnickych Uprav Krajiny) | Tippl, M.(Vyzkumny Ustav Melioraci a Ochrany Pudy, Prague (Czech Republic))
The evaluation of a series (1961-2000) of ombrographic records from 13 selected stations of Czech Hydrometeorological Institute provided long-term annual summation values and annual peaks of the rainfall-runoff erosivity factor R in the USLE. There were 8 erosive rainfall events per station on average, varying from 1 to 25. The long-term summation values of R factor were in the range of 42 to 106 (average 66) and annual peaks ranged from 19 to 38 (average 29). There were on average more than 2 erosive rainfall events per year per station, the number varying from 0 to 12. The long-term summation values of R factor ranged from 25 to 67 (average 45), with annual peaks from 17 to 36 (average 27.5). The average value of the erosivity factor R=20 recommended for the Czech Republic until now should be increased to R=45 and/or 66, which would necessitate more stringent conservation measures.
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