Currents in a small channel on a sandy tidal flat

Elgar, Steve; Raubenheimer, Britt

doi:10.1016/j.csr.2010.10.007

Cited by 9 publications

(3 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Specifically, assuming a quadratic drag law, bottom friction coefficients, , were estimated as the slope of a linear fit to pressure gradient versus | | [Brown and Trask (1980);Campbell et al (1998); Giese and Jay (1989); Kim et al (2000) .011 at Katama. These estimates are similar to those obtained from the profiling current meter assuming a logarithmic boundary layer for the relatively few cases with a good fit [Kim et al (2000)], and to estimates based on the variance of the vertical velocities at sensor 05 [Elgar and Raubenheimer (2010); Nezu and Rodi (1986)]. …”

Section: Bottom Frictionsupporting

confidence: 70%

Hydrodynamics of a multiple tidal inlet system : Katama Bay, Martha�s Vineyard, MA

Orescanin¹

2015

View full text Add to dashboard Cite

Observations, theoretical models, and a numerical model (ADCIRC) are used to investigate the effects of tides, waves, bay bathymetry, and changing inlet geometry on the hydrodynamics of the multiple-inlet Katama system, Martha's Vineyard, MA. Momentum fluxes from breaking waves drive water into the inlet, nearly stopping the 2 m/s ebb currents during a hurricane. The evolving morphology of Katama Inlet has a dominant effect on tidal distortion and bay circulation. As Katama inlet lengthened, narrowed, and shoaled between 2011 and 2014, the relative effects of friction (observed and simulated) increased greatly, resulting in reduced circulation energy, an increase in the M6 tidal constituent, and changes in velocity asymmetries that are consistent with an evolution from flood to ebb dominance. The effects of changing inlet parameters (e.g., inlet geometry, bay bathymetry, friction, tidal forcing) are quantified via a lumped element model that accounts for the presence of a shallow flood shoal that limits flow from the ocean into the bay. As the difference in depth between inlet and flood shoal increases, the amplitude and phase of the incoming tide are increasingly modified from predictions without a flood shoal, and flows into the bay are further hindered.

show abstract

Section: Bottom Frictionsupporting

confidence: 70%

Hydrodynamics of a multiple tidal inlet system : Katama Bay, Martha�s Vineyard, MA

Orescanin¹

2015

View full text Add to dashboard Cite

show abstract

“…River flow during the summer of 2009 was lower than average, about 200 m 3 /s during the August study period and between 300 and 500 m 3 /s during the July period (USGS gage 12200500 http://waterdata.usgs.gov/nwis/nwisman/?site_no=12200500). Numerous small channels (depth O(0.10-0.25 m)) split off from the north fork of the Skagit and extend across the marshes onto the tidal flats near the measurement locations (Elgar and Raubenheimer, 2011;Webster et al, 2012). However, the majority of the discharge from the north (south) fork exits onto the flats about 2.5 km northwest (4.5 km southeast) of the field study area.…”

Section: Geographic Settingmentioning

confidence: 99%

Stratification on the Skagit Bay tidal flats

Pavel¹

2012

View full text Add to dashboard Cite

show abstract

“…Meanwhile, it occupies an important position in the study of global carbon cycle and climate change (Wang, 1997;Wang et al, 1999). Under deposition and currents, tidal creeks, especially the main tidal creeks (D'Alpaos et al, 2005), constantly undergo headward erosion, migration, swing and detour, which have an important impact on coastal dike locks, reclamation projects, deposition, hydrology and ecosystems (Elgar, 2011). Understanding the morphological characteristics (Allen, 2000;Davies, 2010) and evolutional patterns (Bearman et al, 2010;Hood, 2010;Vlaswinkel, 2011; is a prerequisite for investigating the stability of tidal creeks and guiding the sustainable development of coastal areas.…”

Section: Introductionmentioning

confidence: 99%

Method for UAV-based 3D topography reconstruction of tidal creeks

Zhang

Gong

et al. 2021

J. Geogr. Sci.

View full text Add to dashboard Cite

It is common to obtain the topography of tidal flats by the Unmanned Aerial Vehicle (UAV) photogrammetry, but this method is not applicable in tidal creeks. The residual water will lead to inaccurate depth inversion results, and the topography of tidal creeks mainly depends on manual survey. The present study took the tidal creek of Chuandong port in Jiangsu Province, China, as the research area and used UAV oblique photogrammetry to reconstruct the topography of the exposed part above the water after the ebb tide. It also proposed a Trend Prediction Fitting (TPF) method for the topography of the unexposed part below the water to obtain a complete 3D topography. The topography above the water measured by UAV has the vertical precision of 12 cm. When the TPF method is used, the cross-section should be perpendicular the central axis of the tidal creek. A polynomial function can be adapted to most shape of sections, while a Fourier function obtains better results in asymmetrical sections. Compared with the two-order function, the three-order function lends itself to more complex sections. Generally, the TPF method is more suitable for small, straight tidal creeks with clear texture and no vegetation cover.

show abstract

Currents in a small channel on a sandy tidal flat

Abstract: ABSTRACT:Near-bottom currents observed on a tidal flat are compared with those observed 50 m away

Cited by 9 publications

References 32 publications

Hydrodynamics of a multiple tidal inlet system : Katama Bay, Martha�s Vineyard, MA

Hydrodynamics of a multiple tidal inlet system : Katama Bay, Martha�s Vineyard, MA

Stratification on the Skagit Bay tidal flats

Method for UAV-based 3D topography reconstruction of tidal creeks

Contact Info

Product

Resources

About