Sea surficial waves as a driving force that enhances the fresh shallow coastal groundwater flux into the oceans

Nikpeyman, Yaser; Hosono, Takahiro; Ono, Michiyuki; Yang, Heejun; Ichiyanagi, Kimpei; Shimada, Jun; Takikawa, Kiyoshi

doi:10.1007/s12665-019-8258-4

Cited by 4 publications

(2 citation statements)

References 31 publications

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“…Other factors affecting 222 Rn activities during stormy condition are beach setup and wave energy. For example, an SGD study during stormy condition in Japan resulted in two or three times increased 222 Rn concentration compared with calm periods (Nikpeyman et al, 2019), which contradicts the result of this study. The different result can be attributable to the different coastal environment: Dauphin Island and the surrounding Gulf of Mexico are categorized as low-energy depositional coastal environments.…”

Section: Preferential Groundwater Pathways Of Sgdcontrasting

confidence: 81%

Storm-Driven Fresh Submarine Groundwater Discharge and Nutrient Fluxes From a Barrier Island

et al. 2021

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Quantifying and characterizing groundwater flow and discharge from barrier islands to coastal waters is crucial for assessing freshwater resources and contaminant transport to the ocean. In this study, we examined the groundwater hydrological response, discharge, and associated nutrient fluxes in Dauphin Island, a barrier island located in the northeastern Gulf of Mexico. We employed radon (222Rn) and radium (Ra) isotopes as tracers to evaluate the temporal and spatial variability of fresh and recirculated submarine groundwater discharge (SGD) in the nearshore waters. The results from a 40-day continuous 222Rn time series conducted during a rainy season suggest that the coastal area surrounding Dauphin Island was river-dominated in the days after storm events. Groundwater response was detected about 1 week after the precipitation and peak river discharge. During the period when SGD was a factor in the nutrient budget of the coastal area, the total SGD rates were as high as 1.36 m day–1, or almost three times higher than detected fluxes during the river-dominated period. We found from a three-endmember Ra mixing model that most of the SGD from the barrier island was composed of fresh groundwater. SGD was driven by marine and terrestrial forces, and focused on the southeastern part of the island. We observed spatial variability of nutrients in the subterranean estuary across this part of the island. Reduced nitrogen (i.e., NH4+ and dissolved organic nitrogen) fluxes dominated the eastern shore with average rates of 4.88 and 5.20 mmol m–2 day–1, respectively. In contrast, NO3– was prevalent along the south-central shore, which has significant tourism developments. The contrasting nutrient dynamics resulted in N- and P-limited coastal water in the different parts of the island. This study emphasizes the importance of understanding groundwater flow and dynamics in barrier islands, particularly those urbanized, prone to storm events, or located near large estuaries.

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Section: Preferential Groundwater Pathways Of Sgdcontrasting

confidence: 81%

Storm-Driven Fresh Submarine Groundwater Discharge and Nutrient Fluxes From a Barrier Island

et al. 2021

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“…Excessive nutrients and other substances carried by SGD are discharged into the coastal waters, which will produce man-made interference to the biogeochemical process in the coastal zone, causing serious damage to mariculture, fishing and other marine economic activities (Kim et al , 2005;Swarzenski et al , 2007;Hwang et al , 2010). SGD has been studied along different coast including sandy, bedrock fissure and karst coast, of which Many research sites are located in the east and west coasts of the United States in North America (Moore, 1996(Moore, , 2007(Moore, , 2010Zarnoch et al , 2017;Adolf et al , 2019;Kelly et al , 2019), and the eastern coastal areas of Brazil in South America (Niencheski and Windom, 2015;Dias et al , 2016;da Rochaet al , 2018), the Mediterranean coast of Europe (Aaron et al, 2019;Oehler et al, 2019;Tamborski et al, 2018Tamborski et al, ,2019 and the Baltic coast (Donis et al , 2017;Krall et al , 2017;Franzet al , 2019), The east and west coast of Australia (Lamontagne and Webster, 2019;Maher et al , 2019;Sadat-Noori and Glamore, 2019), South Korea , Asia (Lee et al , 2018;Cho et al , 2019;Kang et al , 2019) and the coast of Japan (Burnett et al , 2018;Nikpeyman et al , 2019;Zhu et al , 2019).…”

Section: Introductionmentioning

confidence: 99%

Study on SGD in the Coastal Zone of the Huanghai and Bohai: A review

zhang

Kong

Zhou

et al. 2020

Preprint

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In recent years, hydrogeologists have paid more and more attention to the discharge of submarine groundwater(SGD), which is a typical and important process of the interaction between seawater and groundwater in coastal areas, tidal flats and estuaries.As an important sources of water and chemical materials to ocean, SGD affects the global water cycle and coastal ecological environment. SGD also influence the transport path of pollutants from land to the sea. Therefore, it affects the local and global circulation of coastal groundwater and seawater. Since it usually occurs in aquifer, it is easily overlooked by the researchers. In addition, due to the uncertainty of SGD in time and space, it is difficult to be measured accurately. Aiming at recently study, this paper will discuss the research process, research method, research field and environmental significance of SGD on the coast of the Huanghai and the Bohai. Based on the analysis of the existing research results, some suggestions on improving SGD investigation are put forward.

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Changes in groundwater radon concentrations caused by the 2016 Kumamoto earthquake

Kawabata

Sato

Takahashi

et al. 2020

Journal of Hydrology

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Sea surficial waves as a driving force that enhances the fresh shallow coastal groundwater flux into the oceans

Cited by 4 publications

References 31 publications

Storm-Driven Fresh Submarine Groundwater Discharge and Nutrient Fluxes From a Barrier Island

Storm-Driven Fresh Submarine Groundwater Discharge and Nutrient Fluxes From a Barrier Island

Study on SGD in the Coastal Zone of the Huanghai and Bohai: A review

Changes in groundwater radon concentrations caused by the 2016 Kumamoto earthquake

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