Sediment Transport and Trapping in the Hudson River Estuary

Geyer, W. Rockwell; Woodruff, Jonathan D.; Traykovski, Peter

doi:10.2307/1352875

Cited by 183 publications

(150 citation statements)

References 13 publications

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“…Recent work by Geyer et al (2001), Woodruff et al (2001), and Traykovski et al (2004) discuss watershed inputs to the Hudson estuary turbidity maximum (ETM) in the context of what enters the estuary at the Federal Dam. These studies offer a simplified view of sediment transport through the freshwater reach necessitated by the lack of observational data in this reach.…”

mentioning

confidence: 99%

Suspended Sediment Transport in the Freshwater Reach of the Hudson River Estuary in Eastern New York

Wall

Nystrom

Litten

2008

Estuaries and Coasts

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mentioning

confidence: 99%

Suspended Sediment Transport in the Freshwater Reach of the Hudson River Estuary in Eastern New York

Wall

Nystrom

Litten

2008

Estuaries and Coasts

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“…is the advective flux, u′ [a]c′ is the dispersive flux, and u′a′[c] is Stokes drift flux; these three terms typically dominate in estuarine systems (Geyer et al 2001;Ganju et al 2005). However, because of low tide range and the infrequency of storms in southern California salt marshes, it is likely that these components are negligible most of the time.…”

Section: Sediment Flux Decompositionmentioning

confidence: 99%

Balanced Sediment Fluxes in Southern California’s Mediterranean-Climate Zone Salt Marshes

Rosencranz

Ganju

Ambrose

et al. 2015

Estuaries and Coasts

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Salt marsh elevation and geomorphic stability depends on mineral sedimentation. Many Mediterraneanclimate salt marshes along southern California, USA coast import sediment during El Niño storm events, but sediment fluxes and mechanisms during dry weather are potentially important for marsh stability. We calculated tidal creek sediment fluxes within a highly modified, sediment-starved, 1.5-km 2 salt marsh (Seal Beach) and a less modified 1-km 2 marsh (Mugu) with fluvial sediment supply. We measured salt marsh plain suspended sediment concentration and vertical accretion using single stage samplers and marker horizons. At Seal Beach, a 2014 storm yielded 39 and 28 g/s mean sediment fluxes and imported 12,000 and 8800 kg in a western and eastern channel. Western channel storm imports offset 8700 kg exported during 2 months of dry weather, while eastern channel storm imports augmented 9200 kg imported during dry weather. During the storm at Mugu, suspended sediment concentrations on the marsh plain increased by a factor of four; accretion was 1-2 mm near creek levees. An exceptionally high tide sequence yielded 4.4 g/s mean sediment flux, importing 1700 kg: 20 % of Mugu's dry weather fluxes. Overall, low sediment fluxes were observed, suggesting that these salt marshes are geomorphically stable during dry weather conditions. Results suggest storms and high lunar tides may play large roles, importing sediment and maintaining dry weather sediment flux balances for southern California salt marshes. However, under future climate change and sea level rise scenarios, results suggest that balanced sediment fluxes lead to marsh elevational instability based on estimated mineral sediment deficits.

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“…the Hudson River Estuary (see Fig. 1 of Geyer et al (2001) ). Depth variations in both lateral and longitudinal directions will result in much more complicated residual flow phenomena (Monismith et al 2002;Valle-Levinson et al 2003).…”

Section: Model Assumptions and Their Connection To Field Datamentioning

confidence: 99%

“…In the Hudson River Estuary, Geyer et al (2001) observed that, in a cross-section in the upper reach, turbidity maxima occurred on both left and right sides, whereas in a crosssection near the mouth, only one turbidity maximum was only found on the left side (when looking into the estuary). Recent data collected in the North Passage of the Yangtze Estuary, China, also show different turbidity maxima at two separate cross-sections.…”

Section: Introductionmentioning

confidence: 96%

Longitudinal variation in lateral trapping of fine sediment in tidal estuaries: observations and a 3D exploratory model

Chen

Swart

2018

Ocean Dynamics

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This study investigates the longitudinal variation of lateral entrapment of suspended sediment, as is observed in some tidal estuaries. In particular, field data from the Yangtze Estuary are analysed, which reveal that in one cross-section, two maxima of suspended sediment concentration (SSC) occur close to the south and north sides, while in a cross-section 2 km downestuary, only one SSC maximum on the south side is present. This pattern is found during both spring tide and neap tide, which are characterised by different intensities of turbulence. To understand longitudinal variation in lateral trapping of sediment, results of a new three-dimensional exploratory model are analysed. The hydrodynamic part contains residual flow due to fresh water input, density gradients and Coriolis force and due to channel curvature-induced leakage. Moreover, the model includes a spatially varying eddy viscosity that accounts for variation of intensity of turbulence over the spring-neap cycle. By imposing morphodynamic equilibrium, the two-dimensional distribution of sediment in the domain is obtained analytically by a novel procedure. Results reveal that the occurrence of the SSC maxima near the south side of both crosssections is due to sediment entrapment by lateral density gradients, while the second SSC maximum near the north side of the first cross-section is by sediment transport due to curvature-induced leakage. Coriolis deflection of longitudinal flow also contributes the trapping of sediment near the north side. This mechanism is important in the upper estuary, where the flow due to lateral density gradients is weak.

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Sediment Transport and Trapping in the Hudson River Estuary

Cited by 183 publications

References 13 publications

Suspended Sediment Transport in the Freshwater Reach of the Hudson River Estuary in Eastern New York

Suspended Sediment Transport in the Freshwater Reach of the Hudson River Estuary in Eastern New York

Balanced Sediment Fluxes in Southern California’s Mediterranean-Climate Zone Salt Marshes

Longitudinal variation in lateral trapping of fine sediment in tidal estuaries: observations and a 3D exploratory model

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