Natural 222 Rn and 220 Rn indicate the impact of the Water–Sediment Regulation Scheme (WSRS) on submarine groundwater discharge in the Yellow River estuary, China

Xu, Bochao; Xia, Dong; Burnett, William C.; Dimova, Natasha; Wang, Houjie; Zhang, Longjun; Gao, Maosheng; Jiang, Xueting; Yu, Zhigang

doi:10.1016/j.apgeochem.2014.09.018

Cited by 28 publications

(11 citation statements)

References 25 publications

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“…High salinity SGD has also been shown in some deltas. For example, Xu et al (2013Xu et al ( , 2014 used radium isotopes to quantify SGD fluxes in the Yellow River Delta. They estimated a SGD flux of 1.3 × 10 9 m 3 d −1 with a range of 2.8 × 10 8 -3.0 × 10 9 m 3 d −1 .…”

Section: Geophysical Processesmentioning

confidence: 99%

Submarine Groundwater Discharge: Updates on Its Measurement Techniques, Geophysical Drivers, Magnitudes, and Effects

Taniguchi

Dulai

Burnett

et al. 2019

Front. Environ. Sci.

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192

143

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The number of studies concerning Submarine Groundwater Discharge (SGD) grew quickly as we entered the twenty-first century. Many hydrological and oceanographic processes that drive and influence SGD were identified and characterized during this period. These processes included tidal effects on SGD, water and solute fluxes, biogeochemical transformations through the subterranean estuary, and material transport via SGD from land to sea. Here we compile and summarize the significant progress in SGD assessment methodologies, considering both the terrestrial and marine driving forces, and local as well as global evaluations of groundwater discharge with an emphasis on investigations published over the past decade. Our treatment presents the state-of-the-art progress of SGD studies from geophysical, geochemical, bio-ecological, economic, and cultural perspectives. We identify and summarize remaining research questions, make recommendations for future research directions, and discuss potential future challenges, including impacts of climate change on SGD and improved estimates of the global magnitude of SGD.

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Section: Geophysical Processesmentioning

confidence: 99%

Submarine Groundwater Discharge: Updates on Its Measurement Techniques, Geophysical Drivers, Magnitudes, and Effects

Taniguchi

Dulai

Burnett

et al. 2019

Front. Environ. Sci.

Self Cite

192

143

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“…7 (B1-T and B1-S)) appears to be a reflection of these fresh SGD inputs, although hyperpycnal flows could have the same characteristics (Wright et al 1986) and we cannot necessarily exclude this possibility. However, low dissolved oxygen and low turbidity were also found in this bottom water mass, less than one half meter above the seabed, demonstrating that the source of this bottom water mass was fresh SGD rather than hyperpycnal flows (Xu et al 2014). Typical temperature and salinity profiles at site C2 (Fig.…”

Section: Influence Of the Wsrs On Sgdmentioning

confidence: 97%

“…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%

“…Since WSRS significantly alters the river discharge into the estuary, it is important to consider the influence of the WSRS. An earlier study in this area suggested a qualitative method using 222 Rn and 220 Rn isotopes to indicate an increase of fresh SGD during the WSRS period (Xu et al 2014). Here, we quantitatively estimated the change of SGD under the influence of WSRS.…”

Section: Influence Of the Wsrs On Sgdmentioning

confidence: 98%

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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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“…Since 1996, natural radioactive isotopes Ra and Rn were widely used as tracers to estimate SGD in large scale areas ( Gu et al, 2012;Lee et al, 2012;Moore, 1996Moore, , 2007Moore and Oliveira, 2008;Wang et al, 2015;Xu et al, 2014) . Seepage meters were also used to estimated SGD at local area, such as manual seepage instrument developed by Cable et al ( 1997 ) , heat pulse seepage meter developed by Taniguchi and Fukuo (1993) and ultrasonic flow meter developed by Paulsen et al (2001) .…”

Section: Introductionmentioning

confidence: 99%

Seawater-groundwater Exchange in a Silty Tidal Flat in the South Coast of Laizhou Bay, China

Hou

Chen

et al. 2016

Journal of Coastal Research

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Natural 222 Rn and 220 Rn indicate the impact of the Water–Sediment Regulation Scheme (WSRS) on submarine groundwater discharge in the Yellow River estuary, China

Cited by 28 publications

References 25 publications

Submarine Groundwater Discharge: Updates on Its Measurement Techniques, Geophysical Drivers, Magnitudes, and Effects

Submarine Groundwater Discharge: Updates on Its Measurement Techniques, Geophysical Drivers, Magnitudes, and Effects

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

Seawater-groundwater Exchange in a Silty Tidal Flat in the South Coast of Laizhou Bay, China

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