Acoustic Monitoring of Tidal Flow and Salinity in a Tidal Channel

Fluvial Acoustic Tomography (FAT) is a powerful hydroacoustic system used in the investigations of estuarine dynamics. This research was designed to explore the effectiveness of using a novel and promising method of monitoring the continuous salinity intrusion and velocity distribution in a tidal ch...

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Autores principales:	Hiep Thi Nguyen, Kiyosi Kawanisi, Mohamad Basel Al Sawaf
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	tidal flow salinity distribution hydroacoustics estuary Naval architecture. Shipbuilding. Marine engineering VM1-989 Oceanography GC1-1581
Acceso en línea:	https://doaj.org/article/cdd1bf493e73402190901c751603afe2
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spelling	oai:doaj.org-article:cdd1bf493e73402190901c751603afe22021-11-25T18:03:57ZAcoustic Monitoring of Tidal Flow and Salinity in a Tidal Channel10.3390/jmse91111802077-1312https://doaj.org/article/cdd1bf493e73402190901c751603afe22021-10-01T00:00:00Zhttps://www.mdpi.com/2077-1312/9/11/1180https://doaj.org/toc/2077-1312Fluvial Acoustic Tomography (FAT) is a powerful hydroacoustic system used in the investigations of estuarine dynamics. This research was designed to explore the effectiveness of using a novel and promising method of monitoring the continuous salinity intrusion and velocity distribution in a tidal channel using the FAT scheme. Four FAT units were installed near the riverbanks using a new zigzag system in a rectangular tomographic domain of 700 m × 170 m. The water velocities and salinities measured by FAT in this study were comparable to the data captured by traditional methods, including moving-boat Stream–Pro ADCP, CTD, and CT sensors. It was found that the delays in time between the maximum salinity and high water level along the channel ranged from 12 min to 1.5 h, with these time lags increasing seaward, primarily due to changes in freshwater flows upstream. In addition, the longitudinal salinity gradient was found to decrease toward the mouth of the river, with tide-driven mechanisms most likely being dominant in the dispersion process. The estuary is ebb-dominant, with an asymmetry in the ebb-tide and flood-tide velocities and the highest velocities occurring during the ebb tide. Furthermore, the residual current was found to be affected primarily by the freshwater discharge from upstream.Hiep Thi NguyenKiyosi KawanisiMohamad Basel Al SawafMDPI AGarticletidal flowsalinity distributionhydroacousticsestuaryNaval architecture. Shipbuilding. Marine engineeringVM1-989OceanographyGC1-1581ENJournal of Marine Science and Engineering, Vol 9, Iss 1180, p 1180 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	tidal flow salinity distribution hydroacoustics estuary Naval architecture. Shipbuilding. Marine engineering VM1-989 Oceanography GC1-1581
spellingShingle	tidal flow salinity distribution hydroacoustics estuary Naval architecture. Shipbuilding. Marine engineering VM1-989 Oceanography GC1-1581 Hiep Thi Nguyen Kiyosi Kawanisi Mohamad Basel Al Sawaf Acoustic Monitoring of Tidal Flow and Salinity in a Tidal Channel
description	Fluvial Acoustic Tomography (FAT) is a powerful hydroacoustic system used in the investigations of estuarine dynamics. This research was designed to explore the effectiveness of using a novel and promising method of monitoring the continuous salinity intrusion and velocity distribution in a tidal channel using the FAT scheme. Four FAT units were installed near the riverbanks using a new zigzag system in a rectangular tomographic domain of 700 m × 170 m. The water velocities and salinities measured by FAT in this study were comparable to the data captured by traditional methods, including moving-boat Stream–Pro ADCP, CTD, and CT sensors. It was found that the delays in time between the maximum salinity and high water level along the channel ranged from 12 min to 1.5 h, with these time lags increasing seaward, primarily due to changes in freshwater flows upstream. In addition, the longitudinal salinity gradient was found to decrease toward the mouth of the river, with tide-driven mechanisms most likely being dominant in the dispersion process. The estuary is ebb-dominant, with an asymmetry in the ebb-tide and flood-tide velocities and the highest velocities occurring during the ebb tide. Furthermore, the residual current was found to be affected primarily by the freshwater discharge from upstream.
format	article
author	Hiep Thi Nguyen Kiyosi Kawanisi Mohamad Basel Al Sawaf
author_facet	Hiep Thi Nguyen Kiyosi Kawanisi Mohamad Basel Al Sawaf
author_sort	Hiep Thi Nguyen
title	Acoustic Monitoring of Tidal Flow and Salinity in a Tidal Channel
title_short	Acoustic Monitoring of Tidal Flow and Salinity in a Tidal Channel
title_full	Acoustic Monitoring of Tidal Flow and Salinity in a Tidal Channel
title_fullStr	Acoustic Monitoring of Tidal Flow and Salinity in a Tidal Channel
title_full_unstemmed	Acoustic Monitoring of Tidal Flow and Salinity in a Tidal Channel
title_sort	acoustic monitoring of tidal flow and salinity in a tidal channel
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/cdd1bf493e73402190901c751603afe2
work_keys_str_mv	AT hiepthinguyen acousticmonitoringoftidalflowandsalinityinatidalchannel AT kiyosikawanisi acousticmonitoringoftidalflowandsalinityinatidalchannel AT mohamadbaselalsawaf acousticmonitoringoftidalflowandsalinityinatidalchannel
_version_	1718411708728344576

Acoustic Monitoring of Tidal Flow and Salinity in a Tidal Channel

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