Accelerating Tsunami Modeling for Evacuation Studies through Modification of the Manning Roughness Values
The role of the Manning roughness coefficient in modifying a tsunami time series of flow depth inundation was studied in Iquique, Chile, using a single synthetic earthquake scenario. A high-resolution digital surface model was used as a reference configuration, and several bare land models using con...
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-10-01
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| Series: | GeoHazards |
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| Online Access: | https://www.mdpi.com/2624-795X/3/4/25 |
| _version_ | 1797457666854879232 |
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| author | Giovanni Cárdenas Patricio A. Catalán |
| author_facet | Giovanni Cárdenas Patricio A. Catalán |
| author_sort | Giovanni Cárdenas |
| collection | DOAJ |
| description | The role of the Manning roughness coefficient in modifying a tsunami time series of flow depth inundation was studied in Iquique, Chile, using a single synthetic earthquake scenario. A high-resolution digital surface model was used as a reference configuration, and several bare land models using constant roughness were tested with different grid resolutions. As previously reported, increasing the Manning <i>n</i> value beyond the standard values is essential to reproduce mean statistics such as the inundated area extent and maximum flow depth. The arrival time showed to be less sensitive to changes in the Manning <i>n</i> value, at least in terms of the magnitude of the error. However, increasing the Manning <i>n</i> value too much leads to a critical change in the characteristics of the flow, which departs from its bore-like structure to a more gradual and persistent inundation. It was found that it is possible to find a Manning <i>n</i> value that resembles most features of the reference flow using less resolution in the numerical grids. This allows us to speed up inundation tsunami modeling, which could be useful when multiple inundation simulations are required. |
| first_indexed | 2024-03-09T16:26:20Z |
| format | Article |
| id | doaj.art-2df878ccb1ba4f66b9d0c2e99ea4b41f |
| institution | Directory Open Access Journal |
| issn | 2624-795X |
| language | English |
| last_indexed | 2024-03-09T16:26:20Z |
| publishDate | 2022-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | GeoHazards |
| spelling | doaj.art-2df878ccb1ba4f66b9d0c2e99ea4b41f2023-11-24T15:06:43ZengMDPI AGGeoHazards2624-795X2022-10-013449250710.3390/geohazards3040025Accelerating Tsunami Modeling for Evacuation Studies through Modification of the Manning Roughness ValuesGiovanni Cárdenas0Patricio A. Catalán1Departamento de Obras Civiles, Universidad Técnica Federico Santa María, Santiago 8940899, ChileDepartamento de Obras Civiles, Universidad Técnica Federico Santa María, Valparaíso 2390123, ChileThe role of the Manning roughness coefficient in modifying a tsunami time series of flow depth inundation was studied in Iquique, Chile, using a single synthetic earthquake scenario. A high-resolution digital surface model was used as a reference configuration, and several bare land models using constant roughness were tested with different grid resolutions. As previously reported, increasing the Manning <i>n</i> value beyond the standard values is essential to reproduce mean statistics such as the inundated area extent and maximum flow depth. The arrival time showed to be less sensitive to changes in the Manning <i>n</i> value, at least in terms of the magnitude of the error. However, increasing the Manning <i>n</i> value too much leads to a critical change in the characteristics of the flow, which departs from its bore-like structure to a more gradual and persistent inundation. It was found that it is possible to find a Manning <i>n</i> value that resembles most features of the reference flow using less resolution in the numerical grids. This allows us to speed up inundation tsunami modeling, which could be useful when multiple inundation simulations are required.https://www.mdpi.com/2624-795X/3/4/25tsunami modelingManning roughness coefficient |
| spellingShingle | Giovanni Cárdenas Patricio A. Catalán Accelerating Tsunami Modeling for Evacuation Studies through Modification of the Manning Roughness Values GeoHazards tsunami modeling Manning roughness coefficient |
| title | Accelerating Tsunami Modeling for Evacuation Studies through Modification of the Manning Roughness Values |
| title_full | Accelerating Tsunami Modeling for Evacuation Studies through Modification of the Manning Roughness Values |
| title_fullStr | Accelerating Tsunami Modeling for Evacuation Studies through Modification of the Manning Roughness Values |
| title_full_unstemmed | Accelerating Tsunami Modeling for Evacuation Studies through Modification of the Manning Roughness Values |
| title_short | Accelerating Tsunami Modeling for Evacuation Studies through Modification of the Manning Roughness Values |
| title_sort | accelerating tsunami modeling for evacuation studies through modification of the manning roughness values |
| topic | tsunami modeling Manning roughness coefficient |
| url | https://www.mdpi.com/2624-795X/3/4/25 |
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