Experimental investigation the characteristics of three-dimensional wave field and its effect on sandy sloping seabed

• Published in: Marine georesources & geotechnology Vol. 41; no. 7; pp. 791 - 805
• Main Authors: Shan, Zhigang, Dou, Yuzhe, Sun, Miaojun, Wang, Kuanjun, Qu, Libiao, He, Jianyong, Zhu, Jiahui
• Format: Journal Article
• Language: English
• Published: Philadelphia Taylor & Francis 03.07.2023; Taylor & Francis Ltd
• Subjects: Failure modes; Harbors; Hydrostatic pressure; Ocean floor; Pore pressure; Pore water; Pore water pressure; Reflected waves; Regular waves; scour; Shoaling; three-dimensional seabed topography; Topography; Water pressure; Wave breaking; Wave propagation; wave shoaling
• ISSN: 1064-119X; 1521-0618
• DOI: 10.1080/1064119X.2022.2101963

The three-dimensional topography of the seabed has a significant influence on the wave field and the failure characteristics of the sloping seabed. Nevertheless, previous experimental studies were predominantly limited to two-dimensional wave conditions. In this study, a series of regular wave experiments (including a rigid-slope seabed and a sandy-slope seabed) have been done in a large-scale three-dimensional harbor basin to investigate the three-dimensional wave field in the Zhoushan sea area and the response characteristics of the sloping seabed under the wave actions, respectively. The results of the rigid-seabed tests show that the wave field has obvious three-dimensional characteristics under the influence of three-dimensional topography. During the process of propagation, wave shoaling occurs which leads to wave breaking finally. At the same time, the wave will reflect when it meets the topography, and the reflected wave will affect the wave field in turn. The pore water pressure response and three-dimensional failure modes of sandy sloping seabed under the wave actions are obtained by the sandy-seabed experiment.