Seabed Liquefaction Risk Assessment Based on Wave Spectrum Characteristics: A Case Study of the Yellow River Subaqueous Delta, China DOI Creative Commons

Hongan Sun,

Jishang Xu, Zhenhuan Tian

et al.

Journal of Marine Science and Engineering, Journal Year: 2024, Volume and Issue: 12(12), P. 2276 - 2276

Published: Dec. 11, 2024

Seabed liquefaction induced by wave loading poses considerable risks to marine structures and requires careful consideration in engineering design construction. Traditional methods relying on statistical parameters for analyzing random waves often underestimate the potential seabed liquefaction. To address this underestimation, present study employs field observations numerical simulations examine characteristics distribution across various return periods Chengdao Sea area of Yellow River subaqueous delta. The research results indicated that decay phase exhibited a higher than growth phase, primarily because prevalence low-frequency swell waves. China Hydrological Code Spectrum (CHC Spectrum) effectively captured area, with parameterization grounded measured data. poro-elastic wave–sediment interaction model further elucidated under extreme conditions, revealing maximum depth exceeding 3 m prominent zones at water depths 5–15 m. Notably, properties emerged as critical factor overshadowed depth, non-liquefaction occurring less 15 high clay content, highlighting general risk silty seabed. This enhances understanding process offers valuable insights into safety.

Language: Английский

Pressure characteristics of two-dimensional topography in wave-induced seabed liquefaction DOI
Youqi Wang, Qixiang Wang, Ruichen Cao

et al.

Physics of Fluids, Journal Year: 2025, Volume and Issue: 37(1)

Published: Jan. 1, 2025

This study used the Massachusetts Institute of Technology general circulation model (MITgcm) to simulate seabed liquefaction process in Chengdao area. The liquefied soil and overlying water are considered as a two-layer fluid system model. By constructing various topographies using Gaussian functions, it is possible achieve an agreement between simulation measurement. results reveal characteristics pore pressure different topographies. main findings include following: (1) expansion zone leads accelerated attenuation amplitude. (2) A decrease topographic slope diminishes wave group due sensitivity certain components with specific frequencies slope.

Language: Английский

Citations

0
Study on the Erosion Damage Law in Mountain Flood Disasters Regarding the Exposed Section of Oil Pipelines DOI Open Access
Xiaofei Jing, Jingxin Mao, Jian Zhen Ou

et al.

Water, Journal Year: 2025, Volume and Issue: 17(3), P. 448 - 448

Published: Feb. 5, 2025

Oil pipelines are susceptible to significant hydraulic erosion from mountain torrents during the flood season when passing through valley area, which can lead soil on pipe surface and expose pipeline. Accordingly, this study centers investigating critical issue of failure mechanism caused by flash in exposed section oil pipelines. Both indoor testing numerical simulation research methods employed analyze flow field distribution characteristics floods proximity an This explores patterns loss around varying diameters, levels exposure, angles. In addition, spatial temporal evolution overhang development under action was elucidated. The experimental observations indicate that as diameter increases, rate surrounding accelerates, while effect executives becomes more pronounced. Additionally, a larger angle leads reduced downstream direction pipe. During events, scouring rapid compression pipe, vortex at pipe’s bottom exacerbates corrosion. maximum pressure exerted pipeline surfaces angles 30°, 60°, 90° is 14,382 Pa, 16,146 17,974 respectively. results offer valuable insights into pipeline, soil, water conservation projects regions.

Language: Английский

Citations

0
Modeling the Impacts of Land Reclamation on Sediment Dynamics in a Semi-Enclosed Bay DOI Creative Commons
Yi Zhong, Jun Du, Yongzhi Wang

et al.

Journal of Marine Science and Engineering, Journal Year: 2024, Volume and Issue: 12(9), P. 1633 - 1633

Published: Sept. 13, 2024

Semi-enclosed bays are significantly influenced by the interactions between land and sea, as well human activities. One notable activity, reclamation, impacts water exchange within these bays. However, variability of sediment transport cross-bay following reclamation remains poorly understood. This study aims to enhance understanding dynamics responses reclamation. A well-validated three-dimensional numerical model was developed in Laizhou Bay (LB). Following tidal currents suspended concentration, erosion increased seaward, while factors decreased landward. In LB, surface bottom subtidal flowed opposite directions, with direction volume primarily determined currents. western exhibited an anticyclonic pattern, pronounced seasonal variations observed elsewhere. During summer, predominantly occurred from northeast southwest. winter, northern LB directed westward, it eastward southern part; eastward. Advection played a significant role dynamics. The pathway located central part bay. Notably, flux winter approximately 3.5 times greater than resulting reduction about 22.17%.

Language: Английский

Citations

0
Seabed Liquefaction Risk Assessment Based on Wave Spectrum Characteristics: A Case Study of the Yellow River Subaqueous Delta, China DOI Creative Commons

Hongan Sun,

Jishang Xu, Zhenhuan Tian

et al.

Journal of Marine Science and Engineering, Journal Year: 2024, Volume and Issue: 12(12), P. 2276 - 2276

Published: Dec. 11, 2024

Seabed liquefaction induced by wave loading poses considerable risks to marine structures and requires careful consideration in engineering design construction. Traditional methods relying on statistical parameters for analyzing random waves often underestimate the potential seabed liquefaction. To address this underestimation, present study employs field observations numerical simulations examine characteristics distribution across various return periods Chengdao Sea area of Yellow River subaqueous delta. The research results indicated that decay phase exhibited a higher than growth phase, primarily because prevalence low-frequency swell waves. China Hydrological Code Spectrum (CHC Spectrum) effectively captured area, with parameterization grounded measured data. poro-elastic wave–sediment interaction model further elucidated under extreme conditions, revealing maximum depth exceeding 3 m prominent zones at water depths 5–15 m. Notably, properties emerged as critical factor overshadowed depth, non-liquefaction occurring less 15 high clay content, highlighting general risk silty seabed. This enhances understanding process offers valuable insights into safety.

Language: Английский

Citations

0