Water balance evaluation in Denmark using remote sensing-driven land surface modelling and spatially distributed hydrological modelling

Eva Boegh, Britt S.B. Christensen, Lars Troldborg

Publikation: Bidrag til bog/rapport/konferenceproceedingsKonferenceartikel i proceedings

Abstrakt

This study evaluates the water balance of the island of Sjælland (7330 km2) in Denmark using two different types of physically-based model approaches. The DaisyGIS model is an advanced 1-D land surface model
which is parameterized at the plot-scale and upscaled using remote sensing and GIS (Geographical Information System) data to represent land cover and
soil characteristics. In comparison, the DK-model constitutes a 3-D integrated hydrological model setup (based on the MIKE SHE code) which uses a
comprehensive geological data set and is calibrated to obtain global model parameters representing all catchments at Sjælland. A good agreement was
found between annual net precipitation (precipitation minus evapotranspiration) estimated by the two model systems, but seasonal differences in
evapotranspiration occurred which could be related to the use of the remote sensing for evapotranspiration calculation in Daisy or caused by dissimilar soil
properties. Despite these differences, the DK-model simulated streamflows efficiently for both agricultural and forest catchments. In contrast, Daisy simulations suggest that a more advanced distributed land surface parameterization can contribute to improving water balance simulations of urbanized surface-water dominated catchments. The integrated annual water balance of Sjælland was found to be nearly in balance but large spatial variations occurred among the 30 studied catchments. Overall, the results indicate a need for further studies on model sensitivity and uncertainties related to net precipitation quantification in spatially distributed hydrological modelling.
OriginalsprogEngelsk
TitelQuantification and reduction of predictive uncertainty for sustainable water resources management. Proceedings of Symposium HS2004 at IUGG2007, Perugia, July 2007
RedaktørerEva Boegh, Harald Kunstmann, Thorsten Wagener, Alan Hall, Luis Bastidas, Stewart Franks, Hoshin Gupta, Dan Rosbjerg, John Schaake
ForlagIAHS
Sider267-277
Antal sider12
ISBN (Trykt)9781901502091
StatusUdgivet - 2007
BegivenhedInternational Union of Geodesy and Geophysics XXIV General Assembly - Perugia, Italien
Varighed: 2 jul. 200713 jul. 2007
Konferencens nummer: 24

Publikationsserier

NavnIAHS Publication
ForlagIAHS
Vol/bind313
ISSN (Trykt)0144-7815

Konference

KonferenceInternational Union of Geodesy and Geophysics XXIV General Assembly
Forkortet titelIUAG XXIV
Land/OmrådeItalien
ByPerugia
Periode2/07/0713/07/07

Programområde

  • Programområde 2: Vandressourcer

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