Seabed Dynamic Responses Induced by Nonlinear Internal Waves: New Insights and Future Directions
Strong nonlinear internal waves generate a significant pressure force on the seafloor and induce a pore-pressure response penetrated in the seabed and are thus an important driver of sediment resuspension and a potential trigger of seabed failure. The following provides an overview of the seabed res...
| Main Authors: | , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2023-02-01
|
| Series: | Journal of Marine Science and Engineering |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2077-1312/11/2/395 |
| _version_ | 1797620033562607616 |
|---|---|
| author | Tian Chen Zhenghui Li Hui Nai Hanlu Liu Hongxian Shan Yonggang Jia |
| author_facet | Tian Chen Zhenghui Li Hui Nai Hanlu Liu Hongxian Shan Yonggang Jia |
| author_sort | Tian Chen |
| collection | DOAJ |
| description | Strong nonlinear internal waves generate a significant pressure force on the seafloor and induce a pore-pressure response penetrated in the seabed and are thus an important driver of sediment resuspension and a potential trigger of seabed failure. The following provides an overview of the seabed responses induced by nonlinear internal waves and the theory, models, and limited observations that have provided our present knowledge. The pressure disturbance is generated by the combined effect of interface displacement and near-bottom acceleration by the nonlinear internal waves. Recent observations in the South China Sea have shown that the pressure magnitudes up to 4 kPa, which is the largest known disturbance. Intense pore-pressure changes in roughly the top 1 m of the weakly conductive seabed are expected during the shoaling and breaking of the nonlinear internal waves and lead to 2 cm sediments of the local seabed appearing in transient liquefaction. Since the fluid seepage reduces the specific weight of the bed, results show that the contribution of vertical seepage on sediment resuspension is estimated at 11% for a seabed saturation of 0.97. Finally, in situ observations are needed to confirm theoretical knowledge and to help improve our ability to model the multiscale interaction process between the seabed and internal waves in the future. |
| first_indexed | 2024-03-11T08:35:46Z |
| format | Article |
| id | doaj.art-831cc8cc9b4c455db75ac2421d9551c3 |
| institution | Directory Open Access Journal |
| issn | 2077-1312 |
| language | English |
| last_indexed | 2024-03-11T08:35:46Z |
| publishDate | 2023-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Journal of Marine Science and Engineering |
| spelling | doaj.art-831cc8cc9b4c455db75ac2421d9551c32023-11-16T21:28:36ZengMDPI AGJournal of Marine Science and Engineering2077-13122023-02-0111239510.3390/jmse11020395Seabed Dynamic Responses Induced by Nonlinear Internal Waves: New Insights and Future DirectionsTian Chen0Zhenghui Li1Hui Nai2Hanlu Liu3Hongxian Shan4Yonggang Jia5Shandong Provincial Key Laboratory of Marine Environment and Geological Engineering, Ocean University of China, Qingdao 266100, ChinaShandong Provincial Key Laboratory of Marine Environment and Geological Engineering, Ocean University of China, Qingdao 266100, ChinaSchool of Earth System Science, Tianjin University, Tianjin 300072, ChinaShandong Provincial Key Laboratory of Marine Environment and Geological Engineering, Ocean University of China, Qingdao 266100, ChinaShandong Provincial Key Laboratory of Marine Environment and Geological Engineering, Ocean University of China, Qingdao 266100, ChinaShandong Provincial Key Laboratory of Marine Environment and Geological Engineering, Ocean University of China, Qingdao 266100, ChinaStrong nonlinear internal waves generate a significant pressure force on the seafloor and induce a pore-pressure response penetrated in the seabed and are thus an important driver of sediment resuspension and a potential trigger of seabed failure. The following provides an overview of the seabed responses induced by nonlinear internal waves and the theory, models, and limited observations that have provided our present knowledge. The pressure disturbance is generated by the combined effect of interface displacement and near-bottom acceleration by the nonlinear internal waves. Recent observations in the South China Sea have shown that the pressure magnitudes up to 4 kPa, which is the largest known disturbance. Intense pore-pressure changes in roughly the top 1 m of the weakly conductive seabed are expected during the shoaling and breaking of the nonlinear internal waves and lead to 2 cm sediments of the local seabed appearing in transient liquefaction. Since the fluid seepage reduces the specific weight of the bed, results show that the contribution of vertical seepage on sediment resuspension is estimated at 11% for a seabed saturation of 0.97. Finally, in situ observations are needed to confirm theoretical knowledge and to help improve our ability to model the multiscale interaction process between the seabed and internal waves in the future.https://www.mdpi.com/2077-1312/11/2/395internal solitary wavesseabed stabilitypore pressuredynamic responseseepage |
| spellingShingle | Tian Chen Zhenghui Li Hui Nai Hanlu Liu Hongxian Shan Yonggang Jia Seabed Dynamic Responses Induced by Nonlinear Internal Waves: New Insights and Future Directions Journal of Marine Science and Engineering internal solitary waves seabed stability pore pressure dynamic response seepage |
| title | Seabed Dynamic Responses Induced by Nonlinear Internal Waves: New Insights and Future Directions |
| title_full | Seabed Dynamic Responses Induced by Nonlinear Internal Waves: New Insights and Future Directions |
| title_fullStr | Seabed Dynamic Responses Induced by Nonlinear Internal Waves: New Insights and Future Directions |
| title_full_unstemmed | Seabed Dynamic Responses Induced by Nonlinear Internal Waves: New Insights and Future Directions |
| title_short | Seabed Dynamic Responses Induced by Nonlinear Internal Waves: New Insights and Future Directions |
| title_sort | seabed dynamic responses induced by nonlinear internal waves new insights and future directions |
| topic | internal solitary waves seabed stability pore pressure dynamic response seepage |
| url | https://www.mdpi.com/2077-1312/11/2/395 |
| work_keys_str_mv | AT tianchen seabeddynamicresponsesinducedbynonlinearinternalwavesnewinsightsandfuturedirections AT zhenghuili seabeddynamicresponsesinducedbynonlinearinternalwavesnewinsightsandfuturedirections AT huinai seabeddynamicresponsesinducedbynonlinearinternalwavesnewinsightsandfuturedirections AT hanluliu seabeddynamicresponsesinducedbynonlinearinternalwavesnewinsightsandfuturedirections AT hongxianshan seabeddynamicresponsesinducedbynonlinearinternalwavesnewinsightsandfuturedirections AT yonggangjia seabeddynamicresponsesinducedbynonlinearinternalwavesnewinsightsandfuturedirections |