Assessment of TOPKAPI-X Applicability for Flood Events Simulation in Two Small Catchments in Saxony
Numerical simulations of rainfall-runoff processes are useful tools for understanding hydrological processes and performing impact assessment studies. The advancements in computer technology and data availability have assisted their rapid development and wide use. This project aims to evaluate the a...
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| Format: | Article |
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MDPI AG
2021-07-01
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| Series: | Hydrology |
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| Online Access: | https://www.mdpi.com/2306-5338/8/3/109 |
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| author | Firas Al Janabi Nurlan Ongdas Christian Bernhofer Julian David Reyes Silva Jakob Benisch Peter Krebs |
| author_facet | Firas Al Janabi Nurlan Ongdas Christian Bernhofer Julian David Reyes Silva Jakob Benisch Peter Krebs |
| author_sort | Firas Al Janabi |
| collection | DOAJ |
| description | Numerical simulations of rainfall-runoff processes are useful tools for understanding hydrological processes and performing impact assessment studies. The advancements in computer technology and data availability have assisted their rapid development and wide use. This project aims to evaluate the applicability of a physically based, fully distributed rainfall-runoff model TOPKAPI-X for the simulation of flood events in two small watersheds of Saxony, Germany. The results indicate that the model was calibrated well for 4.88 km<sup>2</sup> Wernersbach catchment (NSE 0.89), whereas 276 km<sup>2</sup> Wesenitz catchment calibration was only satisfactory (NSE 0.7). The addition of the second soil layer improved the model’s performance in comparison to the simulations with only one soil layer for Wernersbach (NSE increase from 0.83 to 0.89). During the validation process, the model showed a variable performance. The best performance was achieved for Wernersbach for the year with the highest runoff (NSE 0.95) in the last decade. The lowest performance for the Wernersbach and Wesenitz catchments was 0.64 for both. The reasons for the model’s low performance in some years are discussed, and include: (i) input data quality and data insufficiency, (ii) methods used within the simulations (interpolation, ETP estimation, etc.), and (iii) assumptions made during the calibration (manual calibration, parameter selection, etc.). |
| first_indexed | 2024-03-10T07:37:19Z |
| format | Article |
| id | doaj.art-ffa5dc44b8ff4f268240c64d8f4ace78 |
| institution | Directory Open Access Journal |
| issn | 2306-5338 |
| language | English |
| last_indexed | 2024-03-10T07:37:19Z |
| publishDate | 2021-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Hydrology |
| spelling | doaj.art-ffa5dc44b8ff4f268240c64d8f4ace782023-11-22T13:22:26ZengMDPI AGHydrology2306-53382021-07-018310910.3390/hydrology8030109Assessment of TOPKAPI-X Applicability for Flood Events Simulation in Two Small Catchments in SaxonyFiras Al Janabi0Nurlan Ongdas1Christian Bernhofer2Julian David Reyes Silva3Jakob Benisch4Peter Krebs5Faculty of Environmental Sciences, Department of Hydrosciences, Institute of Urban Water Management, Technical University of Dresden, 01062 Dresden, GermanyON-Oekohydroprojekt, Aiteke bi 120400, KazakhstanFaculty of Environmental Sciences, Department of Hydrosciences, Institute of Hydrology and Meteorology, Chair of Meteorology, Technical University of Dresden, 01737 Tharandt, GermanyFaculty of Environmental Sciences, Department of Hydrosciences, Institute of Urban Water Management, Technical University of Dresden, 01062 Dresden, GermanyFaculty of Environmental Sciences, Department of Hydrosciences, Institute of Urban Water Management, Technical University of Dresden, 01062 Dresden, GermanyFaculty of Environmental Sciences, Department of Hydrosciences, Institute of Urban Water Management, Technical University of Dresden, 01062 Dresden, GermanyNumerical simulations of rainfall-runoff processes are useful tools for understanding hydrological processes and performing impact assessment studies. The advancements in computer technology and data availability have assisted their rapid development and wide use. This project aims to evaluate the applicability of a physically based, fully distributed rainfall-runoff model TOPKAPI-X for the simulation of flood events in two small watersheds of Saxony, Germany. The results indicate that the model was calibrated well for 4.88 km<sup>2</sup> Wernersbach catchment (NSE 0.89), whereas 276 km<sup>2</sup> Wesenitz catchment calibration was only satisfactory (NSE 0.7). The addition of the second soil layer improved the model’s performance in comparison to the simulations with only one soil layer for Wernersbach (NSE increase from 0.83 to 0.89). During the validation process, the model showed a variable performance. The best performance was achieved for Wernersbach for the year with the highest runoff (NSE 0.95) in the last decade. The lowest performance for the Wernersbach and Wesenitz catchments was 0.64 for both. The reasons for the model’s low performance in some years are discussed, and include: (i) input data quality and data insufficiency, (ii) methods used within the simulations (interpolation, ETP estimation, etc.), and (iii) assumptions made during the calibration (manual calibration, parameter selection, etc.).https://www.mdpi.com/2306-5338/8/3/109TOPKAPI-Xhydrological modelinghigh flow eventsWernersbachWesenitz |
| spellingShingle | Firas Al Janabi Nurlan Ongdas Christian Bernhofer Julian David Reyes Silva Jakob Benisch Peter Krebs Assessment of TOPKAPI-X Applicability for Flood Events Simulation in Two Small Catchments in Saxony Hydrology TOPKAPI-X hydrological modeling high flow events Wernersbach Wesenitz |
| title | Assessment of TOPKAPI-X Applicability for Flood Events Simulation in Two Small Catchments in Saxony |
| title_full | Assessment of TOPKAPI-X Applicability for Flood Events Simulation in Two Small Catchments in Saxony |
| title_fullStr | Assessment of TOPKAPI-X Applicability for Flood Events Simulation in Two Small Catchments in Saxony |
| title_full_unstemmed | Assessment of TOPKAPI-X Applicability for Flood Events Simulation in Two Small Catchments in Saxony |
| title_short | Assessment of TOPKAPI-X Applicability for Flood Events Simulation in Two Small Catchments in Saxony |
| title_sort | assessment of topkapi x applicability for flood events simulation in two small catchments in saxony |
| topic | TOPKAPI-X hydrological modeling high flow events Wernersbach Wesenitz |
| url | https://www.mdpi.com/2306-5338/8/3/109 |
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