Seasonal transportation and deposition of the suspended sediments in the Bohai Sea and Yellow Sea and the related mechanisms

Qiao, Lulu; Zhong, Yi; Wang, Nan; Ke, Zhao; Huang, Lingling; Wang, Zhen

doi:10.1007/s10236-016-0950-2

Cited by 41 publications

(8 citation statements)

References 29 publications

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“…1C), where the essential path of the current from the LB was located. In addition, the active coastal resuspension intensify in the shallow water induced by winter monsoon, which are the major factors resulting the long-distance transport of the particulates from the Bohai Sea to the Yellow Sea (Qiao et al, 2016;Li et al, 2019). Thus, for areas not strongly affected by production sources, transportation from highly polluted waters through coastal currents or water masses could further aggravate the risk of contamination and lead to widespread pollution in the marine ecosystem.…”

Section: Spatial Variationsmentioning

confidence: 99%

Legacy and novel halogenated flame retardants in seawater and atmosphere of the Bohai Sea: Spatial trends, seasonal variations, and influencing factors

et al. 2020

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Section: Spatial Variationsmentioning

confidence: 99%

Legacy and novel halogenated flame retardants in seawater and atmosphere of the Bohai Sea: Spatial trends, seasonal variations, and influencing factors

et al. 2020

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“…The model used in this study was based on the MIKE 3 hydrodynamic module by the Danish Hydraulic Institute, which is developed for a wide range of applications in areas such as oceans, coastal regions, estuaries, and lakes (Dai et al, ; Danish Hydraulic Institute [DHI], ; Gao et al, ; Qiao, Zhong, et al, ; Wang et al, ; Warren & Bach, ; Zhao et al, ). The Hydrodynamic Module is based on the three‐dimensional (3‐D) incompressible Reynolds‐averaged Navier–Stokes equations and adopts Boussinesq approximation and hydrostatic assumption (DHI, ).…”

Section: Methodsmentioning

confidence: 99%

Variation in the Current Shear Front and Its Potential Effect on Sediment Transport Over the Inner Shelf of the East China Sea in Winter

Liu

Qiao

et al. 2018

JGR Oceans

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The current shear fronts (CSFs) in the East China Sea have been observed during winter in previous studies. In this research, we systematically study characteristics and variation mechanism of the CSFs and its potential effects on the transport of water and suspended sediment and on the inner shelf mud area (ISMA), using the methods of observation data analysis and numerical simulation. The spatial structures, shear intensities, and sea‐land locations of the CSFs are obviously affected by wind, temperature and salinity. The CSFs curve seaward due to the nonuniformity of topography, and the tide causes its periodic and sea‐land shift. The landward U component near the CSFs indicate little cross‐CSF transport (i.e., the barrier effect). The CSFs are important hydrodynamic factors that affect the formation of the ISMA. The periodic shift of the CSFs in the longitudinal direction and its variations in spatial structure are the main mechanisms affecting the spatial distribution and thickness of the ISMA. However, the barrier effect of the CSFs can be interrupted, and both the strong wind in the northeast direction and baroclinic conditions are beneficial for cross‐CSF transport. Furthermore, cross‐CSF transports occur in the upper layers under northwest wind condition, in areas with nonuniformity of topography and during the spring tide period. Three cross‐shelf channels are identified in areas where the CSFs curve seaward resulting from nonuniformity of topography.

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“…In the other words, erodibility of a specific site also can be time varying (Maa & Kim, ; Maa & Lee, ). However, the existing sediment transport models usually set

τ_{normalc normalr}

as a constant value for a scope of area or a period of time (see Table in Qiao et al, ), making the

τ_{normalc normalr}

in the models a representative parameter rather than a physical parameter. This simplification is benefit for the efficiency of mathematical operations rather than physical meanings.…”

Section: Introductionmentioning

confidence: 99%

“…In the other words, erodibility of a specific site also can be time varying (Maa & Kim, 2001;Maa & Lee, 1997). However, the existing sediment transport models usually set s cr as a constant value for a scope of area or a period of time (see Table 3 in Qiao et al, 2016), making the s cr in the models a representative parameter rather than a physical parameter. This Key Points: A convenient experimental method was utilized to parameterize the influence of fluidization (excess pore pressure) on sediment erodibility A parametric relationship between the excess pore pressure and erosion coefficient is established for YRD silty sediments for the first time The effect is caused by seepage rates, through both exerting uplifting forces on surface sediments and seepage pumping of subsurface fines In order to overcome the shortcomings of the existing models, numerous studies have been conducted to include the influence of fluidization in the erosion process of sediments.…”

Section: Introductionmentioning

confidence: 99%

Influence of Seepage Flows on the Erodibility of Fluidized Silty Sediments: Parameterization and Mechanisms

et al. 2018

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The influence of seabed fluidization on the erosion of cohesive sediment has been well recognized, however, quantitative parameterization works are rather difficult and remain poorly understood. Therefore, case studies are still needed to achieve better results even locally. Silty seabed in the Yellow River Delta (YRD) has been exposed to frequent fluidization and serious erosion. The present paper attempts to advance the research progress on the influence of fluidization on erosion using an annular flume and the YRD silts as a case study. Erosion coefficients are found to increase from 8.27 × 10−5 to 5.44 × 10−4 kg normalm−2 normals−1, corresponding to fluidization degrees from 0.03 to 0.96. Erodibility may increase by 6–7 times when the bottom sediments are fluidized. The significant influence is successfully parameterized into the erosion coefficient of the linear erosion formulation. Both direction and magnitude of the seepage flows dominate the erodibility of fluidized silts. Infiltration inhibits while upward seepage enhances entrainment of fluidized sediments, specifically via (a) loss of the original cohesive force between soil particles, (b) uplifting seepage forces acting onto the sediments at the water‐seabed interface, which partially offset the particle gravity, and (c) seepage pumping of fines from the interior to the surface, which enlarges the surface Shield parameter.

show abstract

Seasonal transportation and deposition of the suspended sediments in the Bohai Sea and Yellow Sea and the related mechanisms

Cited by 41 publications

References 29 publications

Legacy and novel halogenated flame retardants in seawater and atmosphere of the Bohai Sea: Spatial trends, seasonal variations, and influencing factors

Legacy and novel halogenated flame retardants in seawater and atmosphere of the Bohai Sea: Spatial trends, seasonal variations, and influencing factors

Variation in the Current Shear Front and Its Potential Effect on Sediment Transport Over the Inner Shelf of the East China Sea in Winter

Influence of Seepage Flows on the Erodibility of Fluidized Silty Sediments: Parameterization and Mechanisms

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