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| Titel |
A 1D runoff-runon model : scale and connectivity |
| VerfasserIn |
Marie-Alice Harel, Emmanuel Mouche, Jérémy Patin, Emmanuel Ledoux |
| Konferenz |
EGU General Assembly 2011
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 13 (2011) |
| Datensatznummer |
250048858
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| Zusammenfassung |
| Rainfall is shared differently between runoff and infiltration depending on spatial scale. At the watershed scale, it has been observed that runoff produced at the outlet generally decreases with the size of the watershed (Cerdan et al., 2004). At plot scale, infiltration is usually modelled as an Hortonian process, but this is rigorously justified only at the core scale, and no other model has been proposed for larger scales. The scale dependence of runoff and infiltration is currently explained by the spatial and temporal variability of precipitations, soil properties, vegetation and topography. Only soil properties spatial variability is considered here. We investigate in a stochastic framework the rainfall partitioning on slopes with random infiltrabilities by means of theoretical developments and numerical simulations.
We consider a variation of infiltrability IM along a 1D slope, under a constant rainfall intensity R of uniform repartition. The infiltration function I is defined either by an Horton law, where I(R)=R if R
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