Dynamics of estuarine residual circulation in a narrow channel including tidal-nonlinear effects

Shiraki, Yoshiaki; Yanagi, Tetsuo

doi:10.1007/s10872-007-0038-1

Cited by 3 publications

(2 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The weak residual flow during the dry season can be explained by tidal straining (Burchard et al, 2014;Geyer and MacCready, 2014). Several authors have shown that estuarine residual circulation weakens when tidal importance increases (Li, 1997;Shiraki and Yanagi, 2007;Cheng et al, 2011) as is the case in the Bons Sinais Estuary, where the tidal amplitude reaches ~ 4 m during spring tide.…”

Section: Discussionmentioning

confidence: 98%

The residual circulation profile of the Bons Sinais Estuary in central Mozambique - potential implications for larval dispersal and fisheries

Hoguane

Gammelsrød²,

Furaca³

et al. 2021

West Ind. Oc. J Mar. Sci.

View full text Add to dashboard Cite

The residual circulation in estuaries determines the net exchange of water, heat, salt, fine sediments and drifting biological organisms between estuarine and nearshore marine waters. The Bons Sinais Estuary in central Mozambique is ~ 30 km long with the city of Quelimane and an industrial port on the northern bank of its upper reaches. To investigate residual circulation in the estuary, seasonal (wet, dry and transition season) CTD profiling data were collected at 11 fixed stations between the upper estuary and mouth, and vertical current profiles were measured over a full tidal cycle at a fixed mid-estuary station. Strong longitudinal gradients in salinity and density indicated that the estuary was river-dominated during the wet season and tide-dominated during the dry season, but the water column remained partially mixed. Tidally averaged vertical profiles from the mid-estuary station revealed: uniform vertical temperatures, warmest during the wet season; depth-stratified salinity during the wet season, but uniform profiles during the dry and transition seasons with highest salinity during the dry season when the density was also highest. The density was uniform and somewhat lower in the transition season, and in the wet season the density was even lower, but stratified. The vertical velocity profile showed a classical two-layer circulation model, with downstream flow intensifying at the surface, and upstream flow at the bottom, during the wet and transitory seasons, when freshwater discharges into the estuary. The flow velocities obtained from a calibrated Hansen and Rattray model fitted the observed data well, confirming that a simplified modelling approach is adequate to describe the residual flow of the Bons Sinais Estuary. The residual circulation model provides insights useful for fisheries research and predicting the spread of water-borne pollutants in the estuary.

show abstract

Section: Discussionmentioning

confidence: 98%

The residual circulation profile of the Bons Sinais Estuary in central Mozambique - potential implications for larval dispersal and fisheries

Hoguane

Gammelsrød²,

Furaca³

et al. 2021

West Ind. Oc. J Mar. Sci.

View full text Add to dashboard Cite

show abstract

“…Real estuaries exhibit a range of mixing, however, with partially mixed conditions common in the upper estuary and well-mixed salinity near the mouth (Levasseur, Shi et al 2007). The circulation is further complicated by lateral mixing (Nidzieko, Hench et al 2009), the tidal cycle (Nakayama, Okada et al 2005;Guo and Valle-Levinson 2007;Shiraki and Yanagi 2007;Stacey, Fram et al 2008), freshwater inflow (Yanagi and Shimomura 2006), and long-term meteorological variability (Aoki and Isobe 2006). The interaction of these processes also produces estuaries that have higher salinities than ocean values (reverse estuaries) and net inflow from the ocean (storage estuaries).…”

Section: Introductionmentioning

confidence: 99%

The Coastal Dynamics of Heterogeneous Sedimentary Environments: Numerical Modeling of Hydrodynamics and Mass Transport in Estuaries

Keen¹,

Holland²

2010

View full text Add to dashboard Cite

Standard Form 298 (Rev. 8-98) Prescribed by ANSI Std. Z39.18 Public reporting burden for this collection of information is estimated to average 1 hour per response, including the time for reviewing instructions, searching existing data sources, gathering and maintaining the data needed, and completing and reviewing this collection of information. Send comments regarding this burden estimate or any other aspect of this collection of information, including suggestions for reducing this burden to Department of Defense, Washington Headquarters Services, Directorate for Information Operations and Reports (0704-0188), 1215 Jefferson Davis Highway, Suite 1204, Arlington, VA 22202-4302. Respondents should be aware that notwithstanding any other provision of law, no person shall be subject to any penalty for failing to comply with a collection of information if it does not display a currently valid OMB control number. PLEASE DO NOT RETURN YOUR FORM TO THE ABOVE ADDRESS. 5a. CONTRACT NUMBER 5b. GRANT NUMBER 5c. PROGRAM ELEMENT NUMBER 5d. PROJECT NUMBER 5e. TASK NUMBER 5f. WORK UNIT NUMBER

show abstract

A First Study of the Residual Circulation Profile in the Bouregreg Estuary (Morocco)

Haddout,

Hoguane,

Casila

et al. 2023

Lecture Notes in Civil Engineering

View full text Add to dashboard Cite

Dynamics of estuarine residual circulation in a narrow channel including tidal-nonlinear effects

Cited by 3 publications

References 27 publications

The residual circulation profile of the Bons Sinais Estuary in central Mozambique - potential implications for larval dispersal and fisheries

The residual circulation profile of the Bons Sinais Estuary in central Mozambique - potential implications for larval dispersal and fisheries

The Coastal Dynamics of Heterogeneous Sedimentary Environments: Numerical Modeling of Hydrodynamics and Mass Transport in Estuaries

A First Study of the Residual Circulation Profile in the Bouregreg Estuary (Morocco)

Contact Info

Product

Resources

About