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| Titel |
Effect of spatial distribution of daily rainfall on interior catchment response of a distributed hydrological model |
| VerfasserIn |
J. M. Schuurmans, M. F. P. Bierkens |
| 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 ; 11, no. 2 ; Nr. 11, no. 2 (2007-01-17), S.677-693 |
| Datensatznummer |
250009207
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| Publikation (Nr.) |
 copernicus.org/hess-11-677-2007.pdf |
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| Zusammenfassung |
| We investigate the effect of spatial variability of daily rainfall
on soil moisture, groundwater level and discharge using a
physically-based, fully-distributed hydrological model. This model
is currently in use with the district water board and is considered
to represent reality. We focus on the effect of rainfall spatial
variability on day-to-day variability of the interior catchment
response, as well as on its effect on the general hydrological
behaviour of the catchment. The study is performed in a flat rural
catchment (135 km2) in the Netherlands, where the climate is
semi-humid (average precipitation 800 mm/year, evapotranspiration
550 mm/year) and rainfall is predominantly stratiform (i.e. large
scale). Both range-corrected radar data (resolution
2.5×2.5 km2) as well as data from a dense network of 30
raingauges are used, observed for the period March–October 2004.
Eight different rainfall scenarios, either spatially distributed or
spatially uniform, are used as input for the hydrological model. The
main conclusions from this study are: (i) using a single raingauge
as rainfall input carries a great risk for the prediction of
discharge, groundwater level and soil moisture, especially if the
raingauge is situated outside the catchment; (ii) taking into
account the spatial variability of rainfall instead of using areal
average rainfall as input for the model is needed to get insight
into the day-to-day spatial variability of discharge, groundwater
level and soil moisture content; (iii) to get insight into the
general behaviour of the hydrological system it is sufficient to use
correct predictions of areal average rainfall over the catchment. |
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