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| Titel |
Rainfall Erosivity Database on the European Scale (REDES): A product of a
high temporal resolution rainfall data collection in Europe |
| VerfasserIn |
Panos Panagos, Cristiano Ballabio, Pasquale Borrelli, Katrin Meusburger, Christine Alewell |
| Konferenz |
EGU General Assembly 2016
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| Medientyp |
Artikel
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| Sprache |
en
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 18 (2016) |
| Datensatznummer |
250128275
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| Publikation (Nr.) |
 EGU/EGU2016-8252.pdf |
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| Zusammenfassung |
| The erosive force of rainfall is expressed as rainfall erosivity. Rainfall erosivity considers the
rainfall amount and intensity, and is most commonly expressed as the R-factor in the
(R)USLE model. The R-factor is calculated from a series of single storm events by
multiplying the total storm kinetic energy with the measured maximum 30-minutes rainfall
intensity. This estimation requests high temporal resolution (e.g. 30 minutes) rainfall data
for sufficiently long time periods (i.e. 20 years) which are not readily available
at European scale. The European Commission’s Joint Research Centre(JRC) in
collaboration with national/regional meteorological services and Environmental
Institutions made an extensive data collection of high resolution rainfall data in the
28 Member States of the European Union plus Switzerland in order to estimate
rainfall erosivity in Europe. This resulted in the Rainfall Erosivity Database on the
European Scale (REDES) which included 1,541 rainfall stations in 2014 and has
been updated with 134 additional stations in 2015. The interpolation of those point
R-factor values with a Gaussian Process Regression (GPR) model has resulted in
the first Rainfall Erosivity map of Europe (Science of the Total Environment, 511,
801-815).
The intra-annual variability of rainfall erosivity is crucial for modelling soil erosion on a
monthly and seasonal basis. The monthly feature of rainfall erosivity has been added in
2015 as an advancement of REDES and the respective mean annual R-factor map.
Almost 19,000 monthly R-factor values of REDES contributed to the seasonal and
monthly assessments of rainfall erosivity in Europe. According to the first results,
more than 50% of the total rainfall erosivity in Europe takes place in the period
from June to September. The spatial patterns of rainfall erosivity have significant
differences between Northern and Southern Europe as summer is the most erosive
period in Central and Northern Europe and autumn in the Mediterranean area. This
spatio-temporal analysis of rainfall erosivity at European scale is very important for policy
makers and farmers for soil conservation, optimization of agricultural land use and
natural hazards prediction. REDES is also used in combination with future rainfall
data from WorldClim to run climate change scenarios. The projection of REDES
combined with climate change scenarios (HADGEM2, RCP4.5) and using a robust
geo-statistical model resulted in a 10–20% increase of the R-factor in Europe till 2050. |
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