Sedimentation in the shear front off the Yellow River mouth

“…Suspended particles discharged from the Yellow River are transported southward and northward under the influence of isobath-parallel tidal currents, and residual current circulations trap a large amount of suspended particles (Qiao et al 2009). Wu (1992) reported that the southern circulation is larger and its velocity is higher than that in the north, indicating a prevailing southward-driven pathway of suspended sediment transport in the Yellow River mouth (Li et al 2001a;Wang et al 2007b). Therefore, total PAH concentrations of sediments in the south mud were higher than those of the north mud (Fig.…”

Section: Distribution Of Pahsmentioning

confidence: 96%

“…The distribution of surface sediment is greatly influenced by the dynamics of the marine environment such as tidal currents, circulation, water masses, and storm waves (Sündermanm and Feng 2004). Tidal and residual currents are the hydrodynamic factors with the most control over the distribution patterns of surface sediments in Laizhou Bay (Li et al 2001a;Wang et al 2007b;Qiao et al 2009). The currents of the Bohai Sea are shown in Fig.…”

Section: Sediment Characteristicsmentioning

confidence: 99%

Polycyclic aromatic hydrocarbons in surface sediments of Laizhou Bay, Bohai Sea, China

Shi

Huang

et al. 2010

Environ Earth Sci

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Concentration, distribution, and sources of 16 polycyclic aromatic hydrocarbons (PAHs) were investigated in surface sediments of Laizhou Bay, China. Total PAH concentrations ranged from 97.2 to 204.8 ng/g, with a mean of 148.4 ng/g. High concentrations of PAHs were found in the fine-grained sediments on both sides of the Yellow River estuary (YRE). In contrast, low levels of PAHs were observed in relatively coarse grain sediments, suggesting hydrodynamics influence the accumulation of sedimentary PAHs. The YRE and its adjacent area is the main sink for Yellow River-derived PAHs. Both PAH isomer ratios and principal component analysis (PCA) with multivariate linear regression (MLR) were applied to apportion sources of PAHs. Results indicated that both pyrogenic and petrogenic PAH sources were important. Further PCA/MLR analysis showed that the contributions of coal combustion, petroleum combustion and a combined source of spilled oil and biomass burning were 41, 15 and 44%, respectively. From an ecotoxicological viewpoint, the studied area appears to have low levels of PAH pollution.

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“…Several researchers have investigated the negative influence of decreasing freshwater inflows on the ecosystem of the Yellow River Estuary (Zhang et al 2003). Many of the Yellow River studies have focused on downstream sediment transport, primarily because of the high sediment concentration in the river (Li et al 2001). Environmental objectives that are not directly related to sediment often do not receive equal attention.…”

Section: Introductionmentioning

confidence: 99%

Critical Environmental Flows to Support Integrated Ecological Objectives for the Yellow River Estuary, China

Sun

Zhang

Cui

2007

Water Resour Manage

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The volume of inflowing water needed to meet multiple demands in the Yellow River Estuary of China was examined and quantified. Pressure on available environmental flows comes from varied ecological objectives, including maintenance of freshwater habitat for hundreds of plant and animal species, salinity balance, sediment transport and general equilibrium of the hydrologic cycle. Temporal fluctuations of flow input and output were considered and the amount of water needed for both consumptive and non-consumptive uses was evaluated. The rule of summation was used to calculate consumptive water requirements and the rule of compatibility (i.e., maximum principle) was adapted to estimate the non-consumptive ones. It was determined that the minimum, medium and high levels of annual environmental flows are 134.22×10 8 , 162.73×10 8 and 274.9×10 8 m 3 , respectively, in the Yellow River Estuary, which represent 23.7, 28.7 and 48.5% of the natural river discharge. Water requirements differ across months. The months of May through June, August and October were identified as the most critical periods for maintaining the environmental flows. The basic purpose of water entering the system is to compensate for water losses due to evaporation and to maintain an acceptable level of salinity in the estuary. Sediment transport into and through the estuary area are likely to be directly impacted by variations in river discharge. Improved efficiency in the sediment transport regime of the Yellow River could potentially reduce environmental flow requirements of the estuary, thus freeing water resources for other beneficial uses.

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Sedimentation in the shear front off the Yellow River mouth

Cited by 66 publications

References 14 publications

River mouth bar formation, riverbed aggradation and channel migration in the modern Huanghe (Yellow) River delta, China

River mouth bar formation, riverbed aggradation and channel migration in the modern Huanghe (Yellow) River delta, China

Polycyclic aromatic hydrocarbons in surface sediments of Laizhou Bay, Bohai Sea, China

Critical Environmental Flows to Support Integrated Ecological Objectives for the Yellow River Estuary, China

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