Remote Sensing Studies of Suspended Sediment Concentration Variations in a Coastal Bay During the Passages of Atmospheric Cold Fronts

Li, Yangdong; Li, Chunyan; Li, Xiaofeng

doi:10.1109/jstars.2017.2655421

Cited by 10 publications

(4 citation statements)

References 48 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…From October to the following April every year, the northern Gulf of Mexico (NGOM) experiences intensified cold fronts, sometimes with severe storms (Roberts et al, ). These weather systems affect the coastal NGOM significantly (e.g., Feng & Li, ; Li et al, ; Lin et al, ; Siadatmousavi et al, ; Siadatmousavi & Jose, ; Walker & Hammack, ), as well as other areas (e.g., Li & Chen, ). The passage of cold fronts can result in wind regime shifts across the area.…”

Section: Introductionmentioning

confidence: 99%

“…Keen and Stavn () later used observations and numerical models considering atmospheric forcing and hydrodynamics to investigate the optical environment at Santa Rosa Island, Florida during two cold front passages. Water exchange and circulations under mesoscale weather systems like winter storms and cold fronts can have impact not only on the water exchange in the coastal regions, but also sediment transport (Li et al, ; Warner et al, ). Studies on cold front induced sediment transport and concentration distribution in the shelf water of Gulf of Mexico and in the coastal estuaries were investigated by Perez et al() and Kineke et al ().…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Cold Front Driven Flows Through Multiple Inlets of Lake Pontchartrain Estuary

Huang

2017

JGR Oceans

Self Cite

View full text Add to dashboard Cite

With in situ observations using acoustic Doppler current profilers (ADCPs) and numerical experiments using the Finite Volume Coastal Ocean Model (FVCOM), this study investigates atmospheric cold front induced exchange of water between Lake Pontchartrain Estuary and coastal ocean through multiple inlets. Results show that the subtidal hydrodynamic response is highly correlated with meteorological parameters. Northerly and westerly winds tend to push water out of Lake Pontchartrain, while south and east winds tend to produce currents flowing into it. For most cases, the subtidal water level is inversely correlated with the east wind, with the correlation coefficient being ∼0.8. The most important finding of this work is that, contrary to intuition, the cold front induced remote wind effect has the greatest contribution to the overall water level variation, while the local wind stress determines the surface slope inside the estuary. It is found that wind driven flow is roughly quasi steady state: the surface slope in the north‐south direction is determined by the north‐south wind stress, explaining ∼83% of the variability but less so in the east‐west direction (∼43%). In other words, the north‐south local wind stress determines the water level gradient in that direction in the estuary while the overall water level change is pretty much controlled by the open boundary which is the “remote wind effect,” a regional response that can be illustrated only by a numerical model for a much larger area encompassing the estuary.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Cold Front Driven Flows Through Multiple Inlets of Lake Pontchartrain Estuary

Huang

2017

JGR Oceans

Self Cite

View full text Add to dashboard Cite

show abstract

“…The WLD is formed by sediment delivered by the Atchafalaya River, which is then transported and deposited in the WLO. The sediment transport and accretion in the WLD and Atchafalaya Bay can be regulated by water level variation, water volume transport, and water current induced by winter winds (Elsayed and Oumeraci, 2017;HRECOS, 2017;Kemp et al, 2017;Li et al, 2017).…”

Section: Implication Of Findings On Sediment Transport and Wetlandsmentioning

confidence: 99%

A numerical experiment of cold front induced circulation in Wax Lake Delta: evaluation of forcing factors

Feizabadi,

Li,

Hiatt

2023

Front. Mar. Sci.

Self Cite

View full text Add to dashboard Cite

The effects of passing atmospheric cold fronts with different orientations and moving directions on the hydrodynamics of the Wax Lake Delta (WLD) were analyzed by considering the influence of river discharge, cold front moving direction, wind magnitude, and Coriolis effect. The study employs numerical simulations using the Delft-3D model and an analytical model to explore water volume transport, water level variations, water circulation, and particle trajectories during nine cold front events. Results indicate that cold fronts cause a decrease in the average contribution of the water transport through western channels and an increase of that in central and eastern channels. A westerly cold front with an average wind speed of ~12 m/s can increase water transport through eastern channels by about 35%. During the passage of a cold front, the intertidal islands between the main channels and East Bay experience the largest fluctuations in subtidal water levels, which can be attributed to the influence of local wind stress. For example, a westerly cold front can result in a water level variation of approximately 0.45 m over some of the intertidal Islands and 0.65 m in the East Bay. Results also show that the subtidal water circulation in the WLD is correlated with the Wax Lake Outlet (WLO) discharge and wind magnitude. The findings illustrate that when WLO discharge is low, the impact of cold fronts is more pronounced, and cold fronts from the west have a greater impact compared to those from the northwest and north. This study identifies the significance of WLO discharge and Coriolis force by the trajectories of particles in the water column. The results of the simulations indicate that under low WLO discharge (less than 2000 m3/s), the majority of particles are found to exit through Campground Pass instead of Gadwall because of the dominance of Coriolis force. To summarize, this study assesses the impact of cold fronts on the hydrodynamics of the Wax Lake Delta, underscoring the contributions of multiple factors, including the cold front moving direction, river discharge, wind strength, and Coriolis force.

show abstract

“…Because winter cold fronts have a significant impact on the resuspension and transport of materials in the WLD region [38], it is critical to understand water circulation during these events to determine the net sediment, nutrient and carbon transports within the WLD proper [36,37,39,40] and between the Atchafalaya-WLD system and the adjacent shelf area [38,[40][41][42][43]. However, direct hydrological measurements are particularly challenging during severe weather such as cold fronts.…”

Section: Introductionmentioning

confidence: 99%

Water Circulation Driven by Cold Fronts in the Wax Lake Delta (Louisiana, USA)

Zhang

Huang

et al. 2022

JMSE

Self Cite

View full text Add to dashboard Cite

Atmospheric cold fronts can periodically generate storm surges and affect sediment transport in the Northern Gulf of Mexico (NGOM). In this paper, we evaluate water circulation spatiotemporal patterns induced by six atmospheric cold front events in the Wax Lake Delta (WLD) in coastal Louisiana using the 3-D hydrodynamic model ECOM-si. Model simulations show that channelized and inter-distributary water flow is significantly impacted by cold fronts. Water volume transport throughout the deltaic channel network is not just constrained to the main channels but also occurs laterally across channels accounting for about a quarter of the total flow. Results show that a significant landward flow occurs across the delta prior to the frontal passage, resulting in a positive storm surge on the coast. The along-channel current velocity dominates while cross-channel water transport occurs at the southwest lobe during the post-frontal stage. Depending on local weather conditions, the cold-front-induced flushing event lasts for 1.7 to 7 days and can flush 32–76% of the total water mass out of the system, a greater range of variability than previous reports. The magnitude of water flushed out of the system is not necessarily dependent on the duration of the frontal events. An energy partitioning analysis shows that the relative importance of subtidal energy (10–45% of the total) and tidal energy (20–70%) varies substantially from station to station and is linked to the weather impact. It is important to note that within the WLD region, the weather-induced subtidal energy (46–66% of the total) is much greater than the diurnal tidal energy (13–25% of the total). The wind associated with cold fronts in winter is the main factor controlling water circulation in the WLD and is a major driver in the spatial configureuration of the channel network and delta progradation rates.

show abstract

Remote Sensing Studies of Suspended Sediment Concentration Variations in a Coastal Bay During the Passages of Atmospheric Cold Fronts

Cited by 10 publications

References 48 publications

Cold Front Driven Flows Through Multiple Inlets of Lake Pontchartrain Estuary

Cold Front Driven Flows Through Multiple Inlets of Lake Pontchartrain Estuary

A numerical experiment of cold front induced circulation in Wax Lake Delta: evaluation of forcing factors

Water Circulation Driven by Cold Fronts in the Wax Lake Delta (Louisiana, USA)

Contact Info

Product

Resources

About