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| Titel |
Similarity Analysis between near surface soil moisture and streamflow during recession events in an alpine catchment |
| VerfasserIn |
Raphael Mutzner, Steven V. Weijs, Andrea Rinaldo, Marc B. Parlange |
| Konferenz |
EGU General Assembly 2013
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 15 (2013) |
| Datensatznummer |
250079982
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| Zusammenfassung |
| Spatial and temporal variability of near surface soil moisture is important for understanding
streamflow generation in high altitude mountain catchments since antecedent soil moisture
plays an important role in the timing of runoff. For relatively small to medium
sized catchments, the spatial variability of near surface soil moisture is hard to
capture with remote sensing techniques and distributed point measurements are
needed. Linking local measurements of soil moisture with integrating catchment scale
streamflow measurements remains a great challenge in hydrological modeling.
Since 2008, an alpine watershed of 20.4 km2 has been intensively monitored in the
Swiss Alps, with a deployment of a network of wireless meteorological stations,
measuring soil moisture along with other meteorological forcings. The discharge is
monitored at three different sites. We present some preliminary results from a statistical
analysis linking the spatial variation of the soil moisture, measured at 20 and 40 cm,
with the variation of the streamflow in the particular case of recession events. A
classic parameterization of recession events relating the variation of the discharge
dQ-dt to the discharge Q by |dQ-dt|- Qβ is used and transposed to soil moisture
data. The parameterized soil moisture variation is then partitioned into runoff and
evapotranspiration leading to better knowledge of local processes at the hillslope scale. |
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