Evaluation of different calibration strategies for large scale continuous hydrological modelling
For the analysis of climate impact on flood flows and flood frequency in macroscale river basins, hydrological models can be forced by several sets of hourly long-term climate time series. Considering the large number of model units, the small time step and the required recalibrations for different...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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Copernicus Publications
2012-09-01
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| Series: | Advances in Geosciences |
| Online Access: | http://www.adv-geosci.net/31/67/2012/adgeo-31-67-2012.pdf |
| _version_ | 1819086457251299328 |
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| author | M. Wallner U. Haberlandt J. Dietrich |
| author_facet | M. Wallner U. Haberlandt J. Dietrich |
| author_sort | M. Wallner |
| collection | DOAJ |
| description | For the analysis of climate impact on flood flows and flood frequency in
macroscale river basins, hydrological models can be forced by several sets
of hourly long-term climate time series. Considering the large number of
model units, the small time step and the required recalibrations for
different model forcing an efficient calibration strategy and optimisation
algorithm are essential.
<br><br>
This study investigates the impact of different calibration strategies and
different optimisation algorithms on the performance and robustness of a
semi-distributed model. The different calibration strategies were (a) Lumped, (b) 1-Factor, (c) Distributed and (d) Regionalisation. The latter
uses catchment characteristics and estimates parameter values via transfer
functions. These methods were applied in combination with three different
optimisation algorithms: PEST, DDS, and SCE. In addition to the standard
temporal evaluation of the calibration strategies, a spatial evaluation was
applied. This was done by transferring the parameters from calibrated
catchments to uncalibrated ones and validating the model performance of
these uncalibrated catchments. The study was carried out for five
sub-catchments of the Aller-Leine River Basin in Northern Germany.
<br><br>
The best result for temporal evaluation was achieved by using the
combination of the DDS optimisation with the Distributed strategy. The
Regionalisation method obtained the weakest performance for temporal
evaluation. However, for spatial evaluation the Regionalisation indicated
more robust models, closely followed by the Lumped method. The 1-Factor and
the Distributed strategy showed clear disadvantages regarding spatial
parameter transferability. For the parameter estimation based on catchment
descriptors as required for ungauged basins, the Regionalisation strategy
seems to be a promising tool particularly in climate impact analysis and for
hydrological modelling in general. |
| first_indexed | 2024-12-21T21:20:33Z |
| format | Article |
| id | doaj.art-a51cfb718b004fc6967e2b61c8c053dd |
| institution | Directory Open Access Journal |
| issn | 1680-7340 1680-7359 |
| language | English |
| last_indexed | 2024-12-21T21:20:33Z |
| publishDate | 2012-09-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Advances in Geosciences |
| spelling | doaj.art-a51cfb718b004fc6967e2b61c8c053dd2022-12-21T18:49:54ZengCopernicus PublicationsAdvances in Geosciences1680-73401680-73592012-09-0131677410.5194/adgeo-31-67-2012Evaluation of different calibration strategies for large scale continuous hydrological modellingM. Wallner0U. Haberlandt1J. Dietrich2Institute of Water Resource Management, Hydrology and Agricultural Hydraulic Engineering, Faculty of Civil Engineering, University Hannover, GermanyInstitute of Water Resource Management, Hydrology and Agricultural Hydraulic Engineering, Faculty of Civil Engineering, University Hannover, GermanyInstitute of Water Resource Management, Hydrology and Agricultural Hydraulic Engineering, Faculty of Civil Engineering, University Hannover, GermanyFor the analysis of climate impact on flood flows and flood frequency in macroscale river basins, hydrological models can be forced by several sets of hourly long-term climate time series. Considering the large number of model units, the small time step and the required recalibrations for different model forcing an efficient calibration strategy and optimisation algorithm are essential. <br><br> This study investigates the impact of different calibration strategies and different optimisation algorithms on the performance and robustness of a semi-distributed model. The different calibration strategies were (a) Lumped, (b) 1-Factor, (c) Distributed and (d) Regionalisation. The latter uses catchment characteristics and estimates parameter values via transfer functions. These methods were applied in combination with three different optimisation algorithms: PEST, DDS, and SCE. In addition to the standard temporal evaluation of the calibration strategies, a spatial evaluation was applied. This was done by transferring the parameters from calibrated catchments to uncalibrated ones and validating the model performance of these uncalibrated catchments. The study was carried out for five sub-catchments of the Aller-Leine River Basin in Northern Germany. <br><br> The best result for temporal evaluation was achieved by using the combination of the DDS optimisation with the Distributed strategy. The Regionalisation method obtained the weakest performance for temporal evaluation. However, for spatial evaluation the Regionalisation indicated more robust models, closely followed by the Lumped method. The 1-Factor and the Distributed strategy showed clear disadvantages regarding spatial parameter transferability. For the parameter estimation based on catchment descriptors as required for ungauged basins, the Regionalisation strategy seems to be a promising tool particularly in climate impact analysis and for hydrological modelling in general.http://www.adv-geosci.net/31/67/2012/adgeo-31-67-2012.pdf |
| spellingShingle | M. Wallner U. Haberlandt J. Dietrich Evaluation of different calibration strategies for large scale continuous hydrological modelling Advances in Geosciences |
| title | Evaluation of different calibration strategies for large scale continuous hydrological modelling |
| title_full | Evaluation of different calibration strategies for large scale continuous hydrological modelling |
| title_fullStr | Evaluation of different calibration strategies for large scale continuous hydrological modelling |
| title_full_unstemmed | Evaluation of different calibration strategies for large scale continuous hydrological modelling |
| title_short | Evaluation of different calibration strategies for large scale continuous hydrological modelling |
| title_sort | evaluation of different calibration strategies for large scale continuous hydrological modelling |
| url | http://www.adv-geosci.net/31/67/2012/adgeo-31-67-2012.pdf |
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