Estimation of surface wave induced fluid mud thickness on the seafloor

Basit Öğe Kaydı
dc.authoridSafak, Ilgar/0000-0001-7675-0770
dc.authorwosidSahin, Cihan/GQZ-6496-2022
dc.contributor.authorSafak, I
dc.contributor.authorSahin, C.
dc.date.accessioned2024-07-18T20:42:34Z
dc.date.available2024-07-18T20:42:34Z
dc.date.issued2022
dc.departmentİstanbul Bilgi Üniversitesien_US
dc.description.abstractMud-induced dissipation of surface wave energy is a key mechanism that affects wave propagation in muddy environments. The properties of fluid mud on seafloors required to simulate wave dissipation over shallow waters are often unknown in investigations where wave energy reduction over onshore fetch is a key factor in design of coastal infrastructure. Direct observation and estimation of the thickness of fluid mud on seafloors are complicated; this brings a major complication against accurate prediction of waves in muddy environments. As a step towards filling this gap, this study presents for the first time the estimation of the thickness of fluid mud layers surface waves generate over muddy shelves, using three methods : (1) a method based on vertical structure of acoustic backscatter that requires less assumptions, (2) a mass balance based on vertical structure of sediment concentration, and (3) an empirical approach. Comprehensive field observations of wave-mud interaction were collected for two months at 4 m water depth and analyzed here. The results, assumptions, and approaches of these three methods are evaluated. The analysis of the field observations and the estimates show that fluid mud layers formed in the wake of four significant frontal storms with relatively strong low-frequency swell energy (wave periods >= 7 s) during which the wave-induced orbital velocity at the bed exceeded the same threshold of u(b) similar to 0.5 m/s. The thickness of fluid mud layers varied between 4 cm and 15 cm among the four events. Using an onset density of fluid mud based on laboratory experiments, the mass balance method gives fluid mud thicknesses that agree with, but underestimating, the results of the acoustic backscatter method. The empirical approach agrees best with the acoustic backscatter method, when a settling velocity of 3.5 mm/s and a hydraulic roughness of 0.001 m are used, in agreement with the previous sediment and hydrodynamic data collected at the study site. Applicability of these methods to determine fluid mud thickness at other locations requires accurate description of sediment conditions near the seafloor under the influence of surface waves and hydrodynamics.en_US
dc.description.sponsorshipOffice of Naval Research, United States [N00014-07-1-0448, N00014-07-1-0756, N00014-10-1-0363, N00014-10-1-0389, N00014-10-1-0805, N00014-11-1-0269, N00014-13-1-0620]en_US
dc.description.sponsorshipAcknowledgments This work was supported by the Office of Naval Research, United States Grants N00014-07-1-0448, N00014-07-1-0756, N00014-10-1-0363, N00014-10-1-0389, N00014-10-1-0805, N00014-11-1-0269, and N00014-13-1-0620. The authors would like to thank Prof. Ashish J. Mehta for his invaluable input and feedback. The authors also would like to thank the Editor Prof. David Burdige, the Associate Editor, and the three anonymous reviewers for the time and effort they spent for providing suggestions towards improving the manuscript.en_US
dc.identifier.doi10.1016/j.ecss.2021.107735
dc.identifier.issn0272-7714
dc.identifier.issn1096-0015
dc.identifier.scopus2-s2.0-85123942131en_US
dc.identifier.scopusqualityQ1en_US
dc.identifier.urihttps://doi.org/10.1016/j.ecss.2021.107735
dc.identifier.urihttps://hdl.handle.net/11411/7339
dc.identifier.volume267en_US
dc.identifier.wosWOS:000793277900004en_US
dc.identifier.wosqualityQ1en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.language.isoenen_US
dc.publisherAcademic Press Ltd- Elsevier Science Ltden_US
dc.relation.ispartofEstuarine Coastal and Shelf Scienceen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/openAccessen_US
dc.subjectWaveen_US
dc.subjectFluid Muden_US
dc.subjectFluid Mud Layer Thicknessen_US
dc.subjectLutoclineen_US
dc.subjectSuspended Sedimenten_US
dc.subjectAcoustic Backscatteren_US
dc.subjectMass Balanceen_US
dc.subjectAtchafalaya Shelfen_US
dc.subjectDissipationen_US
dc.subjectLouisianaen_US
dc.subjectCoasten_US
dc.subjectBeden_US
dc.titleEstimation of surface wave induced fluid mud thickness on the seaflooren_US
dc.typeArticleen_US

Dosyalar

Koleksiyon

Web of Science Indexed Publications
Scopus Indexed Publications