Hydrodynamics in the Yellow River Estuary via radium isotopes: Ecological perspectives

Xu, Bochao; Burnett, William C.; Dimova, Natasha; Diao, Shu; Mi, Tiezhu; Jiang, Xueting; Yu, Zhigang

doi:10.1016/j.csr.2013.06.018

Cited by 60 publications

(27 citation statements)

References 43 publications

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“…3). Xu et al (2013) also found the highest activities at a salinity of about 27 in the same area during a non-WSRS period, in agreement with our results. Where the peak radium activities occur depends upon radium desorption with salinity, water dilution and radioactive decay for the shortlived isotopes, so this variation was probably a reflection of the prevailing estuarine hydrodynamics regime.…”

Section: Influence Of the Wsrs On Hydrodynamicssupporting

confidence: 94%

“…Such drastic but controlled conditions present during a WSRS period provide a natural laboratory to address discharge effects on mixing, SGD, and other processes. Previous SGD studies in the Yellow River estuary showed a relatively significant groundwater flux compared with river discharge during non-WSRS periods (Taniguchi et al 2008;Peterson et al 2008b;Xu et al 2013), then Xu et al (2014) qualitatively described an increase of SGD flux during the WSRS period. However, there has been no quantitative assessment of the impact of the WSRS, concerning the variation of hydrodynamics and SGD fluxes into the estuary.…”

Section: Introductionmentioning

confidence: 92%

“…Therefore, the very high river discharge during the WSRS period is likely to alter the prevailing estuarine hydrodynamics regime. Xu et al (2013) found transport rates are related to the plume flow trajectories and vary in different directions. Although the water ages derived here cannot precisely reflect the time of arriving at specific boundaries, it can provide an idea of the overall variation of hydrodynamics under the influence of WSRS.…”

Section: Influence Of the Wsrs On Hydrodynamicsmentioning

confidence: 97%

“…The radium quartet has become broadly utilized in examining water transport processes (Moore 2000;Charette et al 2007;Peterson et al 2008a) and assessing SGD fluxes Peterson et al 2008b;Xu et al 2013) in estuaries and coastal zones. Their broad range in half-lives ( 223 Ra, T 1/2 =11.4 days; 224 Ra, T 1/2 =3.66 days; 226 Ra, T 1/2 = 1600 years; 228 Ra, T 1/2 =5.76 years) and characteristic distribution in different water masses make them powerful tracers and chronometers on time scales of days to decades.…”

Section: Introductionmentioning

confidence: 99%

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Variations of Hydrodynamics and Submarine Groundwater Discharge in the Yellow River Estuary Under the Influence of the Water-Sediment Regulation Scheme

Xia

et al. 2015

Estuaries and Coasts

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The BWater-Sediment Regulation Scheme( WSRS) is critically important to the hydrologic evaluation of the Yellow River estuary since a huge pulse of water and sediment are delivered into the sea during a short period. We used the natural geochemical tracers radium ( 223 Ra, 224 Ra, 226 Ra) and radon ( 222 Rn) isotopes as well as other hydrological parameters to investigate the mixing variations and submarine groundwater discharge (SGD) in the Yellow River estuary under the influence of the 2013 WSRS. Dramatically elevated radium and radon isotopic activities were observed during this WSRS compared with activities measured during a non-WSRS period. Radium Bwater ages^indicated that the offshore transport rate nearly tripled when the river discharge increased from 400 to 3400 m 3 /s. We calculated the SGD flux in the Yellow River estuary based on a radium mass balance model as well as radium and radon time-series models. The SGD flux was estimated at 0.02~0.20 m/day during a non-WSRS period and 0.67~1.22 m/day during the 2013 WSRS period. The results also indicate that large river discharge tends to lead more intense SGD along the river channel direction with a large amount of fresh SGD.

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Section: Influence Of the Wsrs On Hydrodynamicssupporting

confidence: 94%

Section: Introductionmentioning

confidence: 92%

Section: Influence Of the Wsrs On Hydrodynamicsmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Variations of Hydrodynamics and Submarine Groundwater Discharge in the Yellow River Estuary Under the Influence of the Water-Sediment Regulation Scheme

Xia

et al. 2015

Estuaries and Coasts

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“…Estuaries are becoming polluted by various human activities due to a quick economic growth and urbanization (Xu et al 2013). Estuarine and coastal areas act as a sink for trace metals and other pollutants incoming from adjacent catchments, up-watershed activities and nearby terrestrial areas, but also they are a source for the same materials to the adjoining coastal marine areas (Kennish and Fertig 2012).…”

mentioning

confidence: 99%

Harmful Elements in Estuarine and Coastal Systems

Khan

Masiol

Hofer

et al. 2014

PHEs, Environment and Human Health

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Estuaries and coastal zones are dynamic transitional systems which provide many economic and ecological benefits to humans, but also are an ideal habitat for other organisms as well. These areas are becoming contaminated by various anthropogenic activities due to a quick economic growth and urbanization. This chapter explores the sources, chemical speciation, sediment accumulation and removal mechanisms of the harmful elements in estuarine and coastal seawaters. It also describes the effects of toxic elements on aquatic flora and fauna. Finally, the toxic element pollution of the Venice Lagoon, a transitional water body located in the northeastern part of Italy, is discussed as a case study, by presenting the procedures adopted to measure the extent of the pollution, the impacts on organisms and the restoration activities.

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Ra Tracer‐Based Study of Submarine Groundwater Discharge and Associated Nutrient Fluxes into the Bohai Sea, China: A Highly Human‐Affected Marginal Sea

Liu

2017

JGR Oceans

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Nutrient concentrations in coastal bays and estuaries are strongly influenced by not only riverine input but also submarine groundwater discharge (SGD). Here we estimate the SGD and the fluxes of the associated dissolved inorganic nitrogen (DIN), phosphorus (DIP), and silicon (DSi) into the Bohai Sea based on a 226Ra and 228Ra mass balance model. This procedure shows that in the Bohai Sea the average radium activities (dpm 100 L−1) are 42.8 ± 6.3 (226Ra) and 212 ± 41.7 (228Ra) for the surface water and 43.0 ± 6.1 (226Ra) and 216 ± 38.4 (228Ra) for the near‐bottom water. According to the 228Ra/226Ra age model, the residence time in the Bohai Sea is calculated to be 1.7 ± 0.8 yrs. The mass balance of 226Ra and 228Ra suggests that the yearly SGD flux into the whole Bohai Sea is (2.0 ± 1.3) × 1011 m3 yr−1, of which the percentage of submarine fresh groundwater discharge (SFGD) to the total SGD is approximately (5.1 ± 4.1)%. However, the DIN and DSi fluxes from SFGD constitute 29% and 10%, respectively, of the total fluxes from the SGD. Moreover, nutrient loads, which exhibit high DIN/DIP from SGD, especially the SFGD, may substantially contribute to the nutrient supplies, resulting in the occurrence of red tide in the Bohai Sea.

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Hydrodynamics in the Yellow River Estuary via radium isotopes: Ecological perspectives

Cited by 60 publications

References 43 publications

Variations of Hydrodynamics and Submarine Groundwater Discharge in the Yellow River Estuary Under the Influence of the Water-Sediment Regulation Scheme

Variations of Hydrodynamics and Submarine Groundwater Discharge in the Yellow River Estuary Under the Influence of the Water-Sediment Regulation Scheme

Harmful Elements in Estuarine and Coastal Systems

Ra Tracer‐Based Study of Submarine Groundwater Discharge and Associated Nutrient Fluxes into the Bohai Sea, China: A Highly Human‐Affected Marginal Sea

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