On the effect of the water body geometry on landslide–tsunamis: physical insight from laboratory tests and 2D to 3D wave parameter transformation
Preliminary landslide–tsunami hazard assessment is commonly based on empirical equations derived from wave channel (2D) or wave basin (3D) experiments. The far-field wave in 2D can easily be an order of magnitude larger than in 3D. The present study systematically investigates the effect of the wate...
| Main Authors: | , |
|---|---|
| Format: | Article |
| Published: |
Elsevier
2015
|
| Subjects: | |
| Online Access: | https://eprints.nottingham.ac.uk/34071/ |
| _version_ | 1848794767935143936 |
|---|---|
| author | Heller, Valentin Spinneken, Johannes |
| author_facet | Heller, Valentin Spinneken, Johannes |
| author_sort | Heller, Valentin |
| building | Nottingham Research Data Repository |
| collection | Online Access |
| description | Preliminary landslide–tsunami hazard assessment is commonly based on empirical equations derived from wave channel (2D) or wave basin (3D) experiments. The far-field wave in 2D can easily be an order of magnitude larger than in 3D. The present study systematically investigates the effect of the water body geometry on the wave characteristics in the near- and far-field. Subaerial landslide–tsunami tests were conducted relying upon both a 2D and a 3D physical model, undertaken with identical boundary conditions. The test parameters included two water depths, three rigid slides, as well as various slide release positions. Empirical equations for 3D offshore and laterally onshore wave properties are presented and compared with previous work. A direct comparison of the wave features reveals that the waves decay in 2D, 3D onshore and 3D offshore with x− 0.30, r− 0.67 and r− 1.0, where x (2D) and r (3D) describe the distance from the impact zone. In 2D four wave types are observed, whereas only the two least non-linear types were observed in 3D. This finding is further analysed with wavelet spectra. For a large slide Froude number F, relative slide thickness S and relative slide mass M, the 3D wave heights in the slide impact zone can be as large as in 2D. However, for small F, S and M, the 3D waves are considerably smaller both in the near- and far-field. A novel method is presented and validated to transform data from 2D studies to 3D. This method may have favourable implications on preliminary landslide–tsunami hazard assessment. |
| first_indexed | 2025-11-14T19:21:26Z |
| format | Article |
| id | nottingham-34071 |
| institution | University of Nottingham Malaysia Campus |
| institution_category | Local University |
| last_indexed | 2025-11-14T19:21:26Z |
| publishDate | 2015 |
| publisher | Elsevier |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | nottingham-340712020-05-04T17:15:53Z https://eprints.nottingham.ac.uk/34071/ On the effect of the water body geometry on landslide–tsunamis: physical insight from laboratory tests and 2D to 3D wave parameter transformation Heller, Valentin Spinneken, Johannes Preliminary landslide–tsunami hazard assessment is commonly based on empirical equations derived from wave channel (2D) or wave basin (3D) experiments. The far-field wave in 2D can easily be an order of magnitude larger than in 3D. The present study systematically investigates the effect of the water body geometry on the wave characteristics in the near- and far-field. Subaerial landslide–tsunami tests were conducted relying upon both a 2D and a 3D physical model, undertaken with identical boundary conditions. The test parameters included two water depths, three rigid slides, as well as various slide release positions. Empirical equations for 3D offshore and laterally onshore wave properties are presented and compared with previous work. A direct comparison of the wave features reveals that the waves decay in 2D, 3D onshore and 3D offshore with x− 0.30, r− 0.67 and r− 1.0, where x (2D) and r (3D) describe the distance from the impact zone. In 2D four wave types are observed, whereas only the two least non-linear types were observed in 3D. This finding is further analysed with wavelet spectra. For a large slide Froude number F, relative slide thickness S and relative slide mass M, the 3D wave heights in the slide impact zone can be as large as in 2D. However, for small F, S and M, the 3D waves are considerably smaller both in the near- and far-field. A novel method is presented and validated to transform data from 2D studies to 3D. This method may have favourable implications on preliminary landslide–tsunami hazard assessment. Elsevier 2015-10-01 Article PeerReviewed Heller, Valentin and Spinneken, Johannes (2015) On the effect of the water body geometry on landslide–tsunamis: physical insight from laboratory tests and 2D to 3D wave parameter transformation. Coastal Engineering, 104 . pp. 113-134. ISSN 0378-3839 Hazard assessment; impulse wave; landslide–tsunami; physical modeling; water waves; wave generation http://www.sciencedirect.com/science/article/pii/S037838391500109X doi:10.1016/j.coastaleng.2015.06.006 doi:10.1016/j.coastaleng.2015.06.006 |
| spellingShingle | Hazard assessment; impulse wave; landslide–tsunami; physical modeling; water waves; wave generation Heller, Valentin Spinneken, Johannes On the effect of the water body geometry on landslide–tsunamis: physical insight from laboratory tests and 2D to 3D wave parameter transformation |
| title | On the effect of the water body geometry on landslide–tsunamis: physical insight from laboratory tests and 2D to 3D wave parameter transformation |
| title_full | On the effect of the water body geometry on landslide–tsunamis: physical insight from laboratory tests and 2D to 3D wave parameter transformation |
| title_fullStr | On the effect of the water body geometry on landslide–tsunamis: physical insight from laboratory tests and 2D to 3D wave parameter transformation |
| title_full_unstemmed | On the effect of the water body geometry on landslide–tsunamis: physical insight from laboratory tests and 2D to 3D wave parameter transformation |
| title_short | On the effect of the water body geometry on landslide–tsunamis: physical insight from laboratory tests and 2D to 3D wave parameter transformation |
| title_sort | on the effect of the water body geometry on landslide–tsunamis: physical insight from laboratory tests and 2d to 3d wave parameter transformation |
| topic | Hazard assessment; impulse wave; landslide–tsunami; physical modeling; water waves; wave generation |
| url | https://eprints.nottingham.ac.uk/34071/ https://eprints.nottingham.ac.uk/34071/ https://eprints.nottingham.ac.uk/34071/ |