Genesis of the mineral groundwaters of the Razdol’nenskii occurrence in Primorye

Челноков, Г. А.; Kharitonova, N. A.; Zykin, N. N.; Vereshchagina, O. F.

doi:10.1134/s1819714008060067

Cited by 3 publications

(4 citation statements)

References 1 publication

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Section: Synoptically Temperature Variability As a Response To The Gr...mentioning

confidence: 98%

“…We believe that the link between the sea and the area of groundwater discharge is the upper highly permeable aquifer (pebbles and sand) and its thickness is 20 m (Chelnokov et al 2008). This is the alluvial-marine complex extends on 30 kilometers from the Razdolnaya River mouth bar and seawaters penetrate into it (Chelnokov et al 2008). It is known that еhe saline groundwater intrusion distance balance is mainly subject to the intensity with which aquifers are loaded with meteoric water and the difference in the density of sea and fresh water (Michael et uctuations of the water level are possible in small lagoons separated from the sea by land and even in water wells connected with the sea via the upper aquifer at a distance of many kilometers (Werner et al 2013).…”

Section: Synoptically Temperature Variability As a Response To The Gr...mentioning

confidence: 98%

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Temperature and Oxygen Response to Groundwater Discharge in the Ice-Covered Razdolnaya River Estuary (Sea of Japan)

Semkin

Tishchenko

Charkin

et al. 2022

Preprint

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The study demonstrates a dynamic connection between the saltwater wedge region and its underlying aquifer. In winter, this estuary is covered with ice and the river flow is at its lowest; that is why its hydrological and oxygen-specific response to groundwater discharge is best marked in this season. Groundwater discharge was detected in the saltwater wedge region by highly active radium isotopes: 224Ra — 66.32 ± 0.60 dpm 100L−1, 223Ra — 2.85 ± 0.17 dpm 100L−1, 228Ra — 159.15 ± 0.13 dpm 100L− 1. The temperature of ground and river waters was +4.3 °С and +0.09 °С, respectively, that of sea water −1.2 °С, and the near-bottom layer temperature increased up to +1.2 °С in the water discharge region. According to the data provided by an anchored autonomous station installed in the area of saltwater discharge influence during the freeze-up period, the temperature reaches 2.5 °С in the saltwater wedge. Groundwater discharge is accompanied by a lower level of oxygen saturation – 67%, at that time oxygen saturation in sea water was 151%. Thus, we present evidence documenting the natural process that may result in a lower level of oxygen saturation in an estuary irrespective of man-induced effects, supply of nutrients and further intensification of production-destruction processes.

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Section: Synoptically Temperature Variability As a Response To The Gr...mentioning

confidence: 98%

Section: Synoptically Temperature Variability As a Response To The Gr...mentioning

confidence: 98%

Temperature and Oxygen Response to Groundwater Discharge in the Ice-Covered Razdolnaya River Estuary (Sea of Japan)

Semkin

Tishchenko

Charkin

et al. 2022

Preprint

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“…It is considered that the main reason for the increase in all three isotopes 223 Ra, 224 Ra, and 228 Ra is that water recirculated into the upper aquifer during the winter period. The upper, highly permeable aquifer comprises pebbles and sand, and its thickness is 20 m [49]. This is the alluvial-marine complex that extends 30 km from the Razdolnaya River mouth bar, and seawaters penetrate into it in winter along the estuary.…”

Section: Identification and Control Factorsof Sw-gw Interactionmentioning

confidence: 99%

“…The circulation of groundwater has a compound system in each local region, while the recharge of the upper aquifer is usually determined by the intensity of rainfall everywhere [51]. The favorable conditions for salt-wedge water recirculation in the upper aquifer exist during the winter discharge low period [52] because the coastal aquifer along Razdolnaya River Estuary is the least loaded with meteoric water during this period [49]. It is known that tides generate complex groundwater fluctuations in aquifers [52].…”

Section: Identification and Control Factorsof Sw-gw Interactionmentioning

confidence: 99%

Radium Isotopes and Hydrochemical Signatures of Surface Water-Groundwater Interaction in the Salt-Wedge Razdolnaya River Estuary (Sea of Japan) in the Ice-Covered Period

Semkin

Charkin

Pavlova

et al. 2023

Water

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The interaction of surface water and groundwater is important in the ecology of coastal basins, affecting hydrological conditions, oxygen regime, carbon, and nutrient exchange. This study demonstrates a dynamic connection between the salt-wedge region and its underlying aquifer in the eutrophic estuary. In winter, this estuary is covered with ice, and the river flow is at its lowest; that is why the specific response to groundwater discharge is best marked in this season. Groundwater admixture was detected in the salt-wedge region by highly active radium isotopes: 223Ra—4.80 ± 0.42 dpm 100 L−1, 224Ra—55.37 ± 1.1 dpm 100 L−1, and 228Ra—189.71 ± 4.66 dpm 100 L−1. The temperature of groundwater and river water was about +4 °C and 0 °C, respectively; that of seawater was −1.6 °C, and temperature increased up to +2.3 °C in the surface water–groundwater interaction region. Groundwater admixture is accompanied by a lower level of oxygen concentration of 52 μmol/kg; at that time, the maximum oxygen concentration in the salt-wedge region was 567 μmol/kg. In waters with a high activity of radium isotopes, there was a maximum partial pressure of CO2—4454 μatm at the range 100–150 μatm in the salt-wedge region and also observed extremum of NH4+, NO2−, and dissolved phosphorus. The surface water–groundwater interaction through anoxic sediment can form localized anaerobic areas despite the general oxygen supersaturation of eutrophic estuary waters and also cause local recycling of nutrients from bottom sediments.

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Water Exchange in the Estuary of the Razdolnaya River (Amur Bay, Japan Sea) in the Ice Covered Period

Семкин¹,

Тищенко²,

Лобанов³

et al. 2019

Izv. Tihookean. naučno-issled. rybohoz. centra

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Environmental conditions in the Razdolnaya/Suifen Estuary and adjacent marine area were monitored from 2008 to 2018, by seasons, including winter observations in January 2014 and January 2018. The river discharge in winter was low: 6 m3 /s (mean annual discharge is 73 m3 /s). The estuary was covered by ice. The cline of salt water at the bottom was traced upstream up to 28 km from the river mouth. The currents in the estuary changed in tidal cycle. Increasing of salinity and temperature (> 2о ) at the bottom was observed in the distance 20–24 km from the river bar (this area was distinguished by relatively thin ice, 20 cm, against 40–70 cm in the rest of estuary). Modeling of the water balance in the estuary showed an additional source of salt water in the internal estuary, beyond the direct exchange with the sea over the river bar, that was presumably the water flow through the aquifer. This groundwater discharge was responsible for supporting of the salted bottom layer and for temperature and salinity increasing in the internal estuary during the ebb phase in conditions of limited water exchange by two-layered estuarine circulation because of ice cover at the river mouth.

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Genesis of the mineral groundwaters of the Razdol’nenskii occurrence in Primorye

Cited by 3 publications

References 1 publication

Temperature and Oxygen Response to Groundwater Discharge in the Ice-Covered Razdolnaya River Estuary (Sea of Japan)

Temperature and Oxygen Response to Groundwater Discharge in the Ice-Covered Razdolnaya River Estuary (Sea of Japan)

Radium Isotopes and Hydrochemical Signatures of Surface Water-Groundwater Interaction in the Salt-Wedge Razdolnaya River Estuary (Sea of Japan) in the Ice-Covered Period

Water Exchange in the Estuary of the Razdolnaya River (Amur Bay, Japan Sea) in the Ice Covered Period

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