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| Titel |
Trends in rainfall erosivity (1955-2006) over the Ebro basin (NE Spain) |
| VerfasserIn |
M. Angulo-Martínez, S. M. Vicente-Serrano, S. Beguería |
| Konferenz |
EGU General Assembly 2009
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 11 (2009) |
| Datensatznummer |
250021738
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| Zusammenfassung |
| As a major soil erosion factor, changes in rainfall erosivity have large economical interest in
many regions, especially for agriculture. This study analyses the temporal evolution of
rainfall erosivity over the Ebro basin, NE Iberian Peninsula, for the period 1955-2006. The
study is based on daily precipitation data available from 156 observatories. Daily
precipitation records were transformed into daily rainfall erosivity data by means
of a seasonally-adjusted exponential relationship. Results showed a generalized
decrease of the annual rainfall erosivity over the region, with important spatial
differences. This trend was most intense towards the East, whereas some areas in the
central valley and in the North (Pyrenees range) experienced an increase. Results at
the seasonal level revealed different patterns that have important implications for
agriculture. Positive trends in rainfall erosivity were found in the centre and the
South-East of the region (Mediterranean coast land) in spring and in the central
area, the Pyrenees range and the North-West in autumn. During winter and summer
negative trends were predominant in the whole region. These results are relevant for
promoting soil conservation measures in the study area, since during spring and
autumn the soils are more exposed while the crops are growing or under tillage. |
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