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Experimental Study on the Incipient Movement of Muddy Clay under Different Salinity Conditions
In order to understand the incipient movement of muddy clay under different salinity conditions, three series of flume tests were performed on incipient movement of muddy clay, including tests on incipient movement of salt-free clay mud under salt water conditions (salt water-salt-free clay mud), in...
Autores principales: | , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Hindawi
2022
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9467802/ https://www.ncbi.nlm.nih.gov/pubmed/36105736 http://dx.doi.org/10.1155/2022/5245928 |
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author | Zhang, Xiaolei Liu, Xin Wu, Haoran Liu, Shuyu Zhu, Yu Bi, Zhengzheng Xu, Zhiheng |
author_facet | Zhang, Xiaolei Liu, Xin Wu, Haoran Liu, Shuyu Zhu, Yu Bi, Zhengzheng Xu, Zhiheng |
author_sort | Zhang, Xiaolei |
collection | PubMed |
description | In order to understand the incipient movement of muddy clay under different salinity conditions, three series of flume tests were performed on incipient movement of muddy clay, including tests on incipient movement of salt-free clay mud under salt water conditions (salt water-salt-free clay mud), incipient movement of salt clay mud under salt water conditions (salt water-salt clay mud), and incipient movement of salt clay mud under freshwater conditions (freshwater-salt clay mud), using a circulating flume, in which the salinity of the water body or cohesive sediment varies from 0 to 40%. Based on the particle image velocimetry system and digital image gray processing technology, the gray curves of water near the clay mud bed surface with the velocity were plotted to quantitatively differentiate the incipient velocity of the sediment for each test. The experimental results showed that the higher the salinity of the water body or cohesive sediments is, the more difficult it is to start moving. There is a logarithmic relationship between the incipient velocity of cohesive sediments and the salinity of the water or cohesive sediments. The incipient velocity increases sharply at a salinity of 0∼10% and slowly at a salinity of 10∼40%. At the same salinity, the incipient velocity of salt clay mud under freshwater conditions is the largest, followed by that of salt clay mud under salt water conditions, while that of salt-free clay mud under salt water conditions is the smallest. In addition, the flow turbulence characteristics were analyzed under the critical conditions of the onset of muddy clay. Ultimately, an empirical formula to calculate the critical incipient velocity of muddy clay is proposed by introducing the salinity. In this study, salinity is included as a reference variable, which expands the research scope of sediment initiation and provides a reference for the study of estuary dynamics. |
format | Online Article Text |
id | pubmed-9467802 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2022 |
publisher | Hindawi |
record_format | MEDLINE/PubMed |
spelling | pubmed-94678022022-09-13 Experimental Study on the Incipient Movement of Muddy Clay under Different Salinity Conditions Zhang, Xiaolei Liu, Xin Wu, Haoran Liu, Shuyu Zhu, Yu Bi, Zhengzheng Xu, Zhiheng ScientificWorldJournal Research Article In order to understand the incipient movement of muddy clay under different salinity conditions, three series of flume tests were performed on incipient movement of muddy clay, including tests on incipient movement of salt-free clay mud under salt water conditions (salt water-salt-free clay mud), incipient movement of salt clay mud under salt water conditions (salt water-salt clay mud), and incipient movement of salt clay mud under freshwater conditions (freshwater-salt clay mud), using a circulating flume, in which the salinity of the water body or cohesive sediment varies from 0 to 40%. Based on the particle image velocimetry system and digital image gray processing technology, the gray curves of water near the clay mud bed surface with the velocity were plotted to quantitatively differentiate the incipient velocity of the sediment for each test. The experimental results showed that the higher the salinity of the water body or cohesive sediments is, the more difficult it is to start moving. There is a logarithmic relationship between the incipient velocity of cohesive sediments and the salinity of the water or cohesive sediments. The incipient velocity increases sharply at a salinity of 0∼10% and slowly at a salinity of 10∼40%. At the same salinity, the incipient velocity of salt clay mud under freshwater conditions is the largest, followed by that of salt clay mud under salt water conditions, while that of salt-free clay mud under salt water conditions is the smallest. In addition, the flow turbulence characteristics were analyzed under the critical conditions of the onset of muddy clay. Ultimately, an empirical formula to calculate the critical incipient velocity of muddy clay is proposed by introducing the salinity. In this study, salinity is included as a reference variable, which expands the research scope of sediment initiation and provides a reference for the study of estuary dynamics. Hindawi 2022-09-05 /pmc/articles/PMC9467802/ /pubmed/36105736 http://dx.doi.org/10.1155/2022/5245928 Text en Copyright © 2022 Xiaolei Zhang et al. https://creativecommons.org/licenses/by/4.0/This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. |
spellingShingle | Research Article Zhang, Xiaolei Liu, Xin Wu, Haoran Liu, Shuyu Zhu, Yu Bi, Zhengzheng Xu, Zhiheng Experimental Study on the Incipient Movement of Muddy Clay under Different Salinity Conditions |
title | Experimental Study on the Incipient Movement of Muddy Clay under Different Salinity Conditions |
title_full | Experimental Study on the Incipient Movement of Muddy Clay under Different Salinity Conditions |
title_fullStr | Experimental Study on the Incipient Movement of Muddy Clay under Different Salinity Conditions |
title_full_unstemmed | Experimental Study on the Incipient Movement of Muddy Clay under Different Salinity Conditions |
title_short | Experimental Study on the Incipient Movement of Muddy Clay under Different Salinity Conditions |
title_sort | experimental study on the incipient movement of muddy clay under different salinity conditions |
topic | Research Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9467802/ https://www.ncbi.nlm.nih.gov/pubmed/36105736 http://dx.doi.org/10.1155/2022/5245928 |
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