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Water 2016, 8(5), 202; doi:10.3390/w8050202

Using High-Resolution Data to Test Parameter Sensitivity of the Distributed Hydrological Model HydroGeoSphere

1
Department of Geography, University of Bonn, Bonn 53115, Germany
2
Agrosphere Institute (IBG-3), Forschungszentrum Jülich, Jülich 52425, Germany
*
Author to whom correspondence should be addressed.
Academic Editor: Xuan Yu
Received: 5 March 2016 / Revised: 9 May 2016 / Accepted: 10 May 2016 / Published: 16 May 2016
(This article belongs to the Special Issue Hillslope and Watershed Hydrology)
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Abstract

Parameterization of physically based and distributed hydrological models for mesoscale catchments remains challenging because the commonly available data base is insufficient for calibration. In this paper, we parameterize a mesoscale catchment for the distributed model HydroGeoSphere by transferring evapotranspiration parameters calibrated at a highly-equipped headwater catchment in addition to literature data. Based on this parameterization, the sensitivity of the mesoscale catchment to spatial variability in land use, potential evapotranspiration and precipitation and of the headwater catchment to mesoscale soil and land use data was conducted. Simulations of the mesoscale catchment with transferred parameters reproduced daily discharge dynamics and monthly evapotranspiration of grassland, deciduous and coniferous vegetation in a satisfactory manner. Precipitation was the most sensitive input data with respect to total runoff and peak flow rates, while simulated evapotranspiration components and patterns were most sensitive to spatially distributed land use parameterization. At the headwater catchment, coarse soil data resulted in a change in runoff generating processes based on the interplay between higher wetness prior to a rainfall event, enhanced groundwater level rise and accordingly, lower transpiration rates. Our results indicate that the direct transfer of parameters is a promising method to benefit highly equipped simulations of the headwater catchments. View Full-Text
Keywords: parameter transfer; distributed hydrological modeling; mesoscale catchment; headwater catchment sensitivity; HydroGeoSphere parameter transfer; distributed hydrological modeling; mesoscale catchment; headwater catchment sensitivity; HydroGeoSphere
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Cornelissen, T.; Diekkrüger, B.; Bogena, H.R. Using High-Resolution Data to Test Parameter Sensitivity of the Distributed Hydrological Model HydroGeoSphere. Water 2016, 8, 202.

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