Comparison Between Two Hydrodynamic Models in Simulating Physical Processes of a Reservoir with Complex Morphology: Maroon Reservoir
Two 3D hydrodynamic models, AEM3D and MIKE3, are compared in simulating hydrodynamics of the Maroon Reservoir in southwest Iran. The reservoir has a complex bathymetry with steep walls, which makes it a good case for studying the performance of hydrodynamic models. The models were compared together...
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MDPI AG
2020-03-01
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| Series: | Water |
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| Online Access: | https://www.mdpi.com/2073-4441/12/3/814 |
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| author | Behnam Zamani Manfred Koch |
| author_facet | Behnam Zamani Manfred Koch |
| author_sort | Behnam Zamani |
| collection | DOAJ |
| description | Two 3D hydrodynamic models, AEM3D and MIKE3, are compared in simulating hydrodynamics of the Maroon Reservoir in southwest Iran. The reservoir has a complex bathymetry with steep walls, which makes it a good case for studying the performance of hydrodynamic models. The models were compared together and with measured water temperatures from different locations of the reservoir in a five-month period between December 2011 and April 2012. The results indicated that the AEM3D model, which uses a finite difference scheme with a purely <i>z</i>-level vertical discretization, showed better consistency with observations so that the AME and RMSE of the model remain below 1 °C. The MIKE3 model showed overall higher errors from 56% to 130% larger than AEM3D and the level of error strongly depends on its vertical discretization method and the turbulence model. The lowest errors by MIKE3 were seen by the <i>k-ε</i> turbulence model with a hybrid <i>z-sigma</i> discretization, while the highest errors were generated by using the <i>sigma</i> vertical discretization. The vertical mixing model in AEM3D model, used instead of the constant eddy viscosity or <i>k-ε</i> formulation, showed a better performance in modeling vertical mixing and wind mixed layer, which is another reason of observing better results by this model than MIKE3. Overall, this study shows AEM3D as a more appropriate model for simulating deep and complex reservoirs with steep slopes and walls. |
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| issn | 2073-4441 |
| language | English |
| last_indexed | 2024-04-12T03:23:51Z |
| publishDate | 2020-03-01 |
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| spelling | doaj.art-45861b715f284256a6fb1778a38fda7c2022-12-22T03:49:46ZengMDPI AGWater2073-44412020-03-0112381410.3390/w12030814w12030814Comparison Between Two Hydrodynamic Models in Simulating Physical Processes of a Reservoir with Complex Morphology: Maroon ReservoirBehnam Zamani0Manfred Koch1Department of Geohydraulics and Engineering Hydrology, Faculty of Civil and Environmental Engineering, University of Kassel, 34109 Kassel, GermanyDepartment of Geohydraulics and Engineering Hydrology, Faculty of Civil and Environmental Engineering, University of Kassel, 34109 Kassel, GermanyTwo 3D hydrodynamic models, AEM3D and MIKE3, are compared in simulating hydrodynamics of the Maroon Reservoir in southwest Iran. The reservoir has a complex bathymetry with steep walls, which makes it a good case for studying the performance of hydrodynamic models. The models were compared together and with measured water temperatures from different locations of the reservoir in a five-month period between December 2011 and April 2012. The results indicated that the AEM3D model, which uses a finite difference scheme with a purely <i>z</i>-level vertical discretization, showed better consistency with observations so that the AME and RMSE of the model remain below 1 °C. The MIKE3 model showed overall higher errors from 56% to 130% larger than AEM3D and the level of error strongly depends on its vertical discretization method and the turbulence model. The lowest errors by MIKE3 were seen by the <i>k-ε</i> turbulence model with a hybrid <i>z-sigma</i> discretization, while the highest errors were generated by using the <i>sigma</i> vertical discretization. The vertical mixing model in AEM3D model, used instead of the constant eddy viscosity or <i>k-ε</i> formulation, showed a better performance in modeling vertical mixing and wind mixed layer, which is another reason of observing better results by this model than MIKE3. Overall, this study shows AEM3D as a more appropriate model for simulating deep and complex reservoirs with steep slopes and walls.https://www.mdpi.com/2073-4441/12/3/814maroon reservoiraem3dmike3hydrodynamic modelingmodel intercomparison |
| spellingShingle | Behnam Zamani Manfred Koch Comparison Between Two Hydrodynamic Models in Simulating Physical Processes of a Reservoir with Complex Morphology: Maroon Reservoir Water maroon reservoir aem3d mike3 hydrodynamic modeling model intercomparison |
| title | Comparison Between Two Hydrodynamic Models in Simulating Physical Processes of a Reservoir with Complex Morphology: Maroon Reservoir |
| title_full | Comparison Between Two Hydrodynamic Models in Simulating Physical Processes of a Reservoir with Complex Morphology: Maroon Reservoir |
| title_fullStr | Comparison Between Two Hydrodynamic Models in Simulating Physical Processes of a Reservoir with Complex Morphology: Maroon Reservoir |
| title_full_unstemmed | Comparison Between Two Hydrodynamic Models in Simulating Physical Processes of a Reservoir with Complex Morphology: Maroon Reservoir |
| title_short | Comparison Between Two Hydrodynamic Models in Simulating Physical Processes of a Reservoir with Complex Morphology: Maroon Reservoir |
| title_sort | comparison between two hydrodynamic models in simulating physical processes of a reservoir with complex morphology maroon reservoir |
| topic | maroon reservoir aem3d mike3 hydrodynamic modeling model intercomparison |
| url | https://www.mdpi.com/2073-4441/12/3/814 |
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