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| Titel |
Process identification of soil erosion in steep mountain regions |
| VerfasserIn |
N. Konz, D. Baenninger, M. Konz, M. Nearing, C. Alewell |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1027-5606
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| Digitales Dokument |
URL |
| Erschienen |
In: Hydrology and Earth System Sciences ; 14, no. 4 ; Nr. 14, no. 4 (2010-04-15), S.675-686 |
| Datensatznummer |
250012269
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| Publikation (Nr.) |
 copernicus.org/hess-14-675-2010.pdf |
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| Zusammenfassung |
| Mountainous soil erosion processes were investigated in the Urseren Valley
(Central Switzerland) by means of measurements and simulations. The
quantification of soil erosion was performed on hill slope scale
(2·20 m) for three different land use types: hayfields, pastures with dwarf
shrubs and pastures without dwarf shrubs with three replicates each. Erosion
rates during growing season were measured with sediment traps between June
2006 and November 2007. Long-term soil erosion rates were estimated based on
Cs- 137 redistribution. In addition, soil moisture and surface flow were
recorded during the growing season in the field and compared to model
output. We chose the WEPP model (Water Erosion Prediction Project) to
simulate soil erosion during the growing season. Model parameters were
determined in the field (slope, plant species, fractional vegetation cover,
initial saturation level), by laboratory analyses (grain size, organic
matter) and by literature study. The WEPP model simulates sheet erosion
processes (interrill and splash erosion processes, please note that no rill
erosion occurs at our sites). Model output resulted in considerable smaller
values than the measured erosion rates with sediment traps for the same
period. We attribute the differences to observed random gravity driven
erosion of soil conglomerates. The Cs-137 measurements deliver substantially
higher mean annual erosion rates, which are most likely connected to snow
cover related processes such as snow gliding and avalanche activities. |
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