Integrated Hydrologic-Hydrodynamic Inundation Modeling in a Groundwater Dependent Tropical Floodplain
The rapid development of free and open-access hydrological models and coupling framework tools continues to present more opportunities for coupled model development for improved assessment of floodplain hydrology. In this study, we set up an Upper Zambezi hydrological model and a fully spatially hyd...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Ital Publication
2022-06-01
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| Series: | Journal of Human, Earth, and Future |
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| Online Access: | https://www.hefjournal.org/index.php/HEF/article/view/158 |
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| author | Innocent C. Chomba Kawawa E. Banda Hessel C. Winsemius Makungu Eunice Henry M. Sichingabula Imasiku A. Nyambe |
| author_facet | Innocent C. Chomba Kawawa E. Banda Hessel C. Winsemius Makungu Eunice Henry M. Sichingabula Imasiku A. Nyambe |
| author_sort | Innocent C. Chomba |
| collection | DOAJ |
| description | The rapid development of free and open-access hydrological models and coupling framework tools continues to present more opportunities for coupled model development for improved assessment of floodplain hydrology. In this study, we set up an Upper Zambezi hydrological model and a fully spatially hydrological-hydrodynamic coupled model for the Barotse Floodplain using GLOFRIM (GLObally applicable computational FRamework for Integrated hydrological–hydrodynamic Modelling). The hydrological and hydrodynamic models used are WFLOW and LISFLOOD-FP, respectively. The simulated flows generated by the wflow model for the upstream gauge stations before the Barotse Floodplain were quite similar and closely matched the observed flow as indicated by the evaluation statistics; Chavuma, nse = 0.738; kge = 0.738; pbias = 2.561 and RSR = 0.511; Watopa, nse = 0.684; kge = 0.816; pbias = 10.577 and RSR = 0.557; and Lukulu, nse = 0.736; kge = 0.795; pbias = 10.437 and RSR = 0.509. However, even though the wflow hydrological model was able to simulate the upstream hydrology very well, the results at the floodplain outlet gauge stations did not quite match the observed monthly flows at Senanga gauge station as indicated by the evaluation statistics: nse = 0.132; kge = 0.509; pbias = 37.740 and RSR = 0.9233. This is mainly because the representation of both floodplain channel hydrodynamics and vertical hydrological processes is necessary to correctly capture floodplain dynamics. Thus, the need for an approach that saves as a basis for developing fully spatially distributed coupled hydrodynamic and hydraulic models’ assessments for groundwater dependent tropical floodplains such as the Barotse floodplain, in closing the gap between hydrology and hydrodynamics in floodplain assessments. A fully coupled model has the potential to be used in implementing adaptive wetland management strategies for water resources allocation, environmental flow (eflows), flood control, land use and climate change impact assessments.
Doi: 10.28991/HEF-2022-03-02-09
Full Text: PDF |
| first_indexed | 2024-04-13T09:48:03Z |
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| institution | Directory Open Access Journal |
| issn | 2785-2997 |
| language | English |
| last_indexed | 2024-04-13T09:48:03Z |
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| spelling | doaj.art-e6cdfe765ec4461bb92696e345b428382022-12-22T02:51:41ZengItal PublicationJournal of Human, Earth, and Future2785-29972022-06-013223724610.28991/HEF-2022-03-02-0975Integrated Hydrologic-Hydrodynamic Inundation Modeling in a Groundwater Dependent Tropical FloodplainInnocent C. Chomba0Kawawa E. Banda1Hessel C. Winsemius2Makungu Eunice3Henry M. Sichingabula4Imasiku A. Nyambe5Integrated Water Resources Management Centre, Department of Geology, School of Mines, University of Zambia, Lusaka,Integrated Water Resources Management Centre, Department of Geology, School of Mines, University of Zambia, Lusaka,2) Water Resources Section, Faculty of Civil Engineering and Applied Geosciences, Delft University of Technology, Delft, The Netherlands. 3) Deltares, P.O. Box 177, 2600 MH Delft,Civil Engineering and Built Environment, St. Augustine University of Tanzania, Box 307, Mwanza,Department of Geography and Environmental Studies, School of Natural Sciences, University of Zambia, Lusaka,Integrated Water Resources Management Centre, Department of Geology, School of Mines, University of Zambia, Lusaka,The rapid development of free and open-access hydrological models and coupling framework tools continues to present more opportunities for coupled model development for improved assessment of floodplain hydrology. In this study, we set up an Upper Zambezi hydrological model and a fully spatially hydrological-hydrodynamic coupled model for the Barotse Floodplain using GLOFRIM (GLObally applicable computational FRamework for Integrated hydrological–hydrodynamic Modelling). The hydrological and hydrodynamic models used are WFLOW and LISFLOOD-FP, respectively. The simulated flows generated by the wflow model for the upstream gauge stations before the Barotse Floodplain were quite similar and closely matched the observed flow as indicated by the evaluation statistics; Chavuma, nse = 0.738; kge = 0.738; pbias = 2.561 and RSR = 0.511; Watopa, nse = 0.684; kge = 0.816; pbias = 10.577 and RSR = 0.557; and Lukulu, nse = 0.736; kge = 0.795; pbias = 10.437 and RSR = 0.509. However, even though the wflow hydrological model was able to simulate the upstream hydrology very well, the results at the floodplain outlet gauge stations did not quite match the observed monthly flows at Senanga gauge station as indicated by the evaluation statistics: nse = 0.132; kge = 0.509; pbias = 37.740 and RSR = 0.9233. This is mainly because the representation of both floodplain channel hydrodynamics and vertical hydrological processes is necessary to correctly capture floodplain dynamics. Thus, the need for an approach that saves as a basis for developing fully spatially distributed coupled hydrodynamic and hydraulic models’ assessments for groundwater dependent tropical floodplains such as the Barotse floodplain, in closing the gap between hydrology and hydrodynamics in floodplain assessments. A fully coupled model has the potential to be used in implementing adaptive wetland management strategies for water resources allocation, environmental flow (eflows), flood control, land use and climate change impact assessments. Doi: 10.28991/HEF-2022-03-02-09 Full Text: PDFhttps://www.hefjournal.org/index.php/HEF/article/view/158barotse floodplainriver flowflood wave propagationhydrologic-hydrodynamic model. |
| spellingShingle | Innocent C. Chomba Kawawa E. Banda Hessel C. Winsemius Makungu Eunice Henry M. Sichingabula Imasiku A. Nyambe Integrated Hydrologic-Hydrodynamic Inundation Modeling in a Groundwater Dependent Tropical Floodplain Journal of Human, Earth, and Future barotse floodplain river flow flood wave propagation hydrologic-hydrodynamic model. |
| title | Integrated Hydrologic-Hydrodynamic Inundation Modeling in a Groundwater Dependent Tropical Floodplain |
| title_full | Integrated Hydrologic-Hydrodynamic Inundation Modeling in a Groundwater Dependent Tropical Floodplain |
| title_fullStr | Integrated Hydrologic-Hydrodynamic Inundation Modeling in a Groundwater Dependent Tropical Floodplain |
| title_full_unstemmed | Integrated Hydrologic-Hydrodynamic Inundation Modeling in a Groundwater Dependent Tropical Floodplain |
| title_short | Integrated Hydrologic-Hydrodynamic Inundation Modeling in a Groundwater Dependent Tropical Floodplain |
| title_sort | integrated hydrologic hydrodynamic inundation modeling in a groundwater dependent tropical floodplain |
| topic | barotse floodplain river flow flood wave propagation hydrologic-hydrodynamic model. |
| url | https://www.hefjournal.org/index.php/HEF/article/view/158 |
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