Applying optimization methods for automatic calibration of 3D morphodynamic numerical models of shallow reservoirs: comparison between lozenge- and hexagon-shaped reservoirs
Understanding the complexity of the siltation process and sediment resuspension in shallow reservoirs is vital for maintaining the reservoir functionality and implementing sustainable sediment management strategies. The geometry of reservoirs plays an indispensable role in the appearance of various...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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IWA Publishing
2023-01-01
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| Series: | Journal of Hydroinformatics |
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| Online Access: | http://jhydro.iwaponline.com/content/25/1/85 |
| _version_ | 1827277637808029696 |
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| author | Vahid Shoarinezhad Silke Wieprecht Sameh Ahmed Kantoush Stefan Haun |
| author_facet | Vahid Shoarinezhad Silke Wieprecht Sameh Ahmed Kantoush Stefan Haun |
| author_sort | Vahid Shoarinezhad |
| collection | DOAJ |
| description | Understanding the complexity of the siltation process and sediment resuspension in shallow reservoirs is vital for maintaining the reservoir functionality and implementing sustainable sediment management strategies. The geometry of reservoirs plays an indispensable role in the appearance of various flow structures inside the basin and, consequently, the pattern of the morphological evolution. In this study, a three-dimensional numerical model, coupled with optimization algorithms, is used to investigate the morphological bed changes in two symmetric shallow reservoirs having hexagon and lozenge shapes. This work aims to evaluate the applicability, efficiency, and accuracy of the automatic calibration routine, which can be a suitable replacement for the time-consuming and subjective method of manual model calibration. In this regard, two sensitive parameters (i.e., roughness height and sediment active layer thickness) are assessed. The goodness-of-fit between the calculated bed levels and the measured topography from physical models are presented by different statistical metrics. From the results, it can be concluded that the automatically calibrated models are in reasonable agreement with the observations. Employing a suitable optimization algorithm, which finds the best possible combination of investigated parameters, can considerably reduce the model calibration time and user intervention.
HIGHLIGHTS
The flow structure and sedimentation pattern in symmetric expansions are numerically studied.;
Local (GML) and a global (BB–BC) optimization algorithms are used to calibrate the numerical models of two symmetric shallow reservoirs.;
GML outperforms BB–BC considering the convergence speed (efficiency) without trapping in local minima by having the same predicted parameter values (robustness).; |
| first_indexed | 2024-04-10T09:33:26Z |
| format | Article |
| id | doaj.art-bc6f31d58939401f9db9b759ed47d3cf |
| institution | Directory Open Access Journal |
| issn | 1464-7141 1465-1734 |
| language | English |
| last_indexed | 2024-04-24T07:36:38Z |
| publishDate | 2023-01-01 |
| publisher | IWA Publishing |
| record_format | Article |
| series | Journal of Hydroinformatics |
| spelling | doaj.art-bc6f31d58939401f9db9b759ed47d3cf2024-04-20T06:18:01ZengIWA PublishingJournal of Hydroinformatics1464-71411465-17342023-01-012518510010.2166/hydro.2022.094094Applying optimization methods for automatic calibration of 3D morphodynamic numerical models of shallow reservoirs: comparison between lozenge- and hexagon-shaped reservoirsVahid Shoarinezhad0Silke Wieprecht1Sameh Ahmed Kantoush2Stefan Haun3 Institute for Modeling Hydraulic and Environmental Systems (IWS), University of Stuttgart, Stuttgart 70569, Germany Institute for Modeling Hydraulic and Environmental Systems (IWS), University of Stuttgart, Stuttgart 70569, Germany Disaster Prevention Research Institute (DPRI), Kyoto University, Uji, Kyoto 611-0011, Japan Institute for Modeling Hydraulic and Environmental Systems (IWS), University of Stuttgart, Stuttgart 70569, Germany Understanding the complexity of the siltation process and sediment resuspension in shallow reservoirs is vital for maintaining the reservoir functionality and implementing sustainable sediment management strategies. The geometry of reservoirs plays an indispensable role in the appearance of various flow structures inside the basin and, consequently, the pattern of the morphological evolution. In this study, a three-dimensional numerical model, coupled with optimization algorithms, is used to investigate the morphological bed changes in two symmetric shallow reservoirs having hexagon and lozenge shapes. This work aims to evaluate the applicability, efficiency, and accuracy of the automatic calibration routine, which can be a suitable replacement for the time-consuming and subjective method of manual model calibration. In this regard, two sensitive parameters (i.e., roughness height and sediment active layer thickness) are assessed. The goodness-of-fit between the calculated bed levels and the measured topography from physical models are presented by different statistical metrics. From the results, it can be concluded that the automatically calibrated models are in reasonable agreement with the observations. Employing a suitable optimization algorithm, which finds the best possible combination of investigated parameters, can considerably reduce the model calibration time and user intervention. HIGHLIGHTS The flow structure and sedimentation pattern in symmetric expansions are numerically studied.; Local (GML) and a global (BB–BC) optimization algorithms are used to calibrate the numerical models of two symmetric shallow reservoirs.; GML outperforms BB–BC considering the convergence speed (efficiency) without trapping in local minima by having the same predicted parameter values (robustness).;http://jhydro.iwaponline.com/content/25/1/853d hydro-morphodynamic modelsautomatic model calibrationparameter estimationreservoir sedimentationshallow reservoirs |
| spellingShingle | Vahid Shoarinezhad Silke Wieprecht Sameh Ahmed Kantoush Stefan Haun Applying optimization methods for automatic calibration of 3D morphodynamic numerical models of shallow reservoirs: comparison between lozenge- and hexagon-shaped reservoirs Journal of Hydroinformatics 3d hydro-morphodynamic models automatic model calibration parameter estimation reservoir sedimentation shallow reservoirs |
| title | Applying optimization methods for automatic calibration of 3D morphodynamic numerical models of shallow reservoirs: comparison between lozenge- and hexagon-shaped reservoirs |
| title_full | Applying optimization methods for automatic calibration of 3D morphodynamic numerical models of shallow reservoirs: comparison between lozenge- and hexagon-shaped reservoirs |
| title_fullStr | Applying optimization methods for automatic calibration of 3D morphodynamic numerical models of shallow reservoirs: comparison between lozenge- and hexagon-shaped reservoirs |
| title_full_unstemmed | Applying optimization methods for automatic calibration of 3D morphodynamic numerical models of shallow reservoirs: comparison between lozenge- and hexagon-shaped reservoirs |
| title_short | Applying optimization methods for automatic calibration of 3D morphodynamic numerical models of shallow reservoirs: comparison between lozenge- and hexagon-shaped reservoirs |
| title_sort | applying optimization methods for automatic calibration of 3d morphodynamic numerical models of shallow reservoirs comparison between lozenge and hexagon shaped reservoirs |
| topic | 3d hydro-morphodynamic models automatic model calibration parameter estimation reservoir sedimentation shallow reservoirs |
| url | http://jhydro.iwaponline.com/content/25/1/85 |
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