Non-hydrostatic depth-integrated models for dam break flows through rigid-emergent vegetation
Dam failures can trigger catastrophic downstream flooding, threatening lives, and infrastructure. Vegetation acts like a natural dam break flow buffer, dissipating energy, reducing wave height and celerity. This highlights importance of vegetation in flood mitigation strategies. Few existing numeric...
Saved in:
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
EDP Sciences
2025-01-01
|
| Series: | E3S Web of Conferences |
| Online Access: | https://www.e3s-conferences.org/articles/e3sconf/pdf/2025/03/e3sconf_isgst2024_04002.pdf |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1832098533529878528 |
|---|---|
| author | Mahmoud Adel A. Ginting Bobby Minola Uchida Tatsuhiko |
| author_facet | Mahmoud Adel A. Ginting Bobby Minola Uchida Tatsuhiko |
| author_sort | Mahmoud Adel A. |
| collection | DOAJ |
| description | Dam failures can trigger catastrophic downstream flooding, threatening lives, and infrastructure. Vegetation acts like a natural dam break flow buffer, dissipating energy, reducing wave height and celerity. This highlights importance of vegetation in flood mitigation strategies. Few existing numerical models consider how vegetation affects dam breaks. This is because it is difficult to calculate vegetation drag force in unsteady rapidly varied flows. This study addresses this gap by developing a non-hydrostatic depth-integrated model to simulate the effect of rigid emergent vegetation on dam break flows under various flow conditions. The model was validated with experimental data. Vegetation was simulated with wooden cylinders with different coverage areas and densities within a straight channel. Three dam break scenarios were investigated in the experiment using different Froude numbers to represent diverse flow regimes. The non-hydrostatic depth-integrated model of the General Bottom Velocity method (GBVC4- DWL) was developed to incorporate the vegetation effect through the drag force equation for non-uniform open channel flows. The results show that rigid emergent vegetation significantly reduces wave celerity and height, particularly downstream, demonstrating its importance in flood mitigation. The numerical model accurately predicted wave behaviour outside the vegetation zone but have difficulties within it, highlighting the need for the model to be improved to capture complex vegetation-flow interactions. |
| format | Article |
| id | doaj-art-953de2be69bc4be58c030e24c43ec930 |
| institution | Kabale University |
| issn | 2267-1242 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | EDP Sciences |
| record_format | Article |
| series | E3S Web of Conferences |
| spelling | doaj-art-953de2be69bc4be58c030e24c43ec9302025-02-05T10:47:34ZengEDP SciencesE3S Web of Conferences2267-12422025-01-016030400210.1051/e3sconf/202560304002e3sconf_isgst2024_04002Non-hydrostatic depth-integrated models for dam break flows through rigid-emergent vegetationMahmoud Adel A.0Ginting Bobby Minola1Uchida Tatsuhiko2Graduate School of Advanced Science and Engineering, Hiroshima UniversityGraduate School of Advanced Science and Engineering, Hiroshima UniversityGraduate School of Advanced Science and Engineering, Hiroshima UniversityDam failures can trigger catastrophic downstream flooding, threatening lives, and infrastructure. Vegetation acts like a natural dam break flow buffer, dissipating energy, reducing wave height and celerity. This highlights importance of vegetation in flood mitigation strategies. Few existing numerical models consider how vegetation affects dam breaks. This is because it is difficult to calculate vegetation drag force in unsteady rapidly varied flows. This study addresses this gap by developing a non-hydrostatic depth-integrated model to simulate the effect of rigid emergent vegetation on dam break flows under various flow conditions. The model was validated with experimental data. Vegetation was simulated with wooden cylinders with different coverage areas and densities within a straight channel. Three dam break scenarios were investigated in the experiment using different Froude numbers to represent diverse flow regimes. The non-hydrostatic depth-integrated model of the General Bottom Velocity method (GBVC4- DWL) was developed to incorporate the vegetation effect through the drag force equation for non-uniform open channel flows. The results show that rigid emergent vegetation significantly reduces wave celerity and height, particularly downstream, demonstrating its importance in flood mitigation. The numerical model accurately predicted wave behaviour outside the vegetation zone but have difficulties within it, highlighting the need for the model to be improved to capture complex vegetation-flow interactions.https://www.e3s-conferences.org/articles/e3sconf/pdf/2025/03/e3sconf_isgst2024_04002.pdf |
| spellingShingle | Mahmoud Adel A. Ginting Bobby Minola Uchida Tatsuhiko Non-hydrostatic depth-integrated models for dam break flows through rigid-emergent vegetation E3S Web of Conferences |
| title | Non-hydrostatic depth-integrated models for dam break flows through rigid-emergent vegetation |
| title_full | Non-hydrostatic depth-integrated models for dam break flows through rigid-emergent vegetation |
| title_fullStr | Non-hydrostatic depth-integrated models for dam break flows through rigid-emergent vegetation |
| title_full_unstemmed | Non-hydrostatic depth-integrated models for dam break flows through rigid-emergent vegetation |
| title_short | Non-hydrostatic depth-integrated models for dam break flows through rigid-emergent vegetation |
| title_sort | non hydrostatic depth integrated models for dam break flows through rigid emergent vegetation |
| url | https://www.e3s-conferences.org/articles/e3sconf/pdf/2025/03/e3sconf_isgst2024_04002.pdf |
| work_keys_str_mv | AT mahmoudadela nonhydrostaticdepthintegratedmodelsfordambreakflowsthroughrigidemergentvegetation AT gintingbobbyminola nonhydrostaticdepthintegratedmodelsfordambreakflowsthroughrigidemergentvegetation AT uchidatatsuhiko nonhydrostaticdepthintegratedmodelsfordambreakflowsthroughrigidemergentvegetation |