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Effect of bed clay on surface water-wave reconstruction from ripples

التفاصيل البيبلوغرافية
العنوان: Effect of bed clay on surface water-wave reconstruction from ripples
المؤلفون: Jonathan Malarkey, Ellen M. Pollard, Roberto Fernández, Xuxu Wu, Jaco H. Baas, Daniel R. Parsons
المصدر: Scientific Reports, Vol 14, Iss 1, Pp 1-9 (2024)
بيانات النشر: Nature Portfolio, 2024.
سنة النشر: 2024
المجموعة: LCC:Medicine
LCC:Science
مصطلحات موضوعية: Geology, Oceanography, Sediment transport, Sand-clay mixtures, Wave reconstruction, Wave ripples, Medicine, Science
الوصف: Abstract Wave ripples can provide valuable information on their formative hydrodynamic conditions in past subaqueous environments by inverting dimension predictors. However, these inversions do not usually take the mixed non-cohesive/cohesive nature of sediment beds into account. Recent experiments involving sand–kaolinite mixtures have demonstrated that wave-ripple dimensions and the threshold of motion are affected by bed clay content. Here, a clean-sand method to determine wave climate from orbital ripple wavelength has been adapted to include the effect of clay and a consistent shear-stress threshold parameterisation. From present-day examples with known wave conditions, the results show that the largest clay effect occurs for coarse sand with median grain diameters over 0.45 mm. For a 7.4% volumetric clay concentration, the range of possible water-surface wavelengths and water depths can be reduced significantly, by factors of three and four compared to clean sand, indicating that neglecting clay when present will underestimate the wave climate.
نوع الوثيقة: article
وصف الملف: electronic resource
اللغة: English
تدمد: 2045-2322
Relation: https://doaj.org/toc/2045-2322
DOI: 10.1038/s41598-024-78821-5
URL الوصول: https://doaj.org/article/1704833b25604d2f8cdb8a72292dcab4
رقم الانضمام: edsdoj.1704833b25604d2f8cdb8a72292dcab4
قاعدة البيانات: Directory of Open Access Journals
الوصف
تدمد:20452322
DOI:10.1038/s41598-024-78821-5