Conceptual Model of Underground Brine Formation in the Silty Coast of Laizhou Bay, Bohai Sea, China

Gao, Maosheng; Hou, Guohua; Guo, Fei

doi:10.2112/si74-015.1

Cited by 15 publications

(20 citation statements)

References 11 publications

(10 reference statements)

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“…Figure 7 shows that the water level is influenced by meteoric water, while the water temperature changes produce a certain annual pattern of variation due to the influence of seawater. Our research conclusion is similar to the groundwater study in the adjacent area of the Huanghai Sea (Gao et al, 2016;Sun et al, 2023).…”

Section: Genetic Modelsupporting

confidence: 89%

Hydrogeochemical characteristics and the genesis of the No. Lu 32 well in the Jiaodong Peninsula, China

Zhai

et al. 2023

Front. Earth Sci.

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The No. Lu 32 well is a seismic observation well situated on the easternmost tip of the Penglai–Weihai fault zone in the Jiaodong Peninsula. It is necessary to reveal the genetic mechanism of the water in this well for earthquake forecasting along the Penglai–Weihai fault zone. Water samples were collected from the No. Lu 32 well, neighboring wells, and seawater to measure the hydrochemical composition and main hydrogen and oxygen isotopic compositions. The water type of the No. Lu 32 well is Cl–Na, which may be due to the influence of seawater intrusion. Hydrogen and oxygen isotopes indicate that the No. Lu 32 well and adjacent wells are mainly influenced by meteoric water, that the high salinity in the water is mainly from the mixing of modern seawater, and that the proportion of seawater there is approximately 5%. Observation of water temperature data in the No. Lu 32 well over several years shows regular annual variations. This comprehensive study shows that the well is greatly affected by seawater backflow infiltration and shallow water. The results of this paper provide an important reference for exploring the hydrogeochemical characteristics and genesis of wells in other coastal zones.

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Section: Genetic Modelsupporting

confidence: 89%

Hydrogeochemical characteristics and the genesis of the No. Lu 32 well in the Jiaodong Peninsula, China

Zhai

et al. 2023

Front. Earth Sci.

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“…In mitochondrial genealogy, we found that three lineages of L. dispar were distributed in Far East Asia: two in the Korean Peninsula and adjacent inland areas, and one in Hokkaido, Japan. Inferring the demographic history of each lineage through mismatch analysis, Group 1 expanded suddenly approximately 53,652 ybp, Group 2 approximately 65,043 ybp, and Group 3 approximately 76,086 ybp, all within the Würm glacial period (110,000–12,000 ybp) (Gao, Hou, & Guo, ).…”

Section: Discussionmentioning

confidence: 99%

“…The Würm glacial period can be divided into three glacial stages and two subinterglacial stages (Gao et al., ; Han & Meng, ; Ma, Yu, Wang, & Yao, ). The mean temperature during the period was approximately 5°C lower than at present, based on the snow‐line elevation on Mt.…”

Section: Discussionmentioning

confidence: 99%

Genetic structure and demographic history ofLymantria dispar(Linnaeus, 1758) (Lepidoptera: Erebidae) in its area of origin and adjacent areas

Kang

Han

Lee

2017

Ecology and Evolution

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We analyzed the population genetic structure and demographic history of 20 Lymantria dispar populations from Far East Asia using microsatellite loci and mitochondrial genes. In the microsatellite analysis, the genetic distances based on pairwise F ST values ranged from 0.0087 to 0.1171. A NeighborNet network based on pairwise F ST genetic distances showed that the 20 regional populations were divided into five groups. Bayesian clustering analysis (K = 3) demonstrated the same groupings. The populations in the Korean Peninsula and adjacent regions, in particular, showed a mixed genetic pattern. In the mitochondrial genetic analysis based on 98 haplotypes, the median‐joining network exhibited a star shape that was focused on three high‐frequency haplotypes (Haplotype 1: central Korea and adjacent regions, Group 1; Haplotype 37: southern Korea, Group 2; and Haplotype 90: Hokkaido area, Group 3) connected by low‐frequency haplotypes. The mismatch distribution dividing the three groups was unimodal. In the neutral test, Tajima's D and Fu's FS tests were negative. We can thus infer that the Far East Asian populations of L. dispar underwent a sudden population expansion. Based on the age expansion parameter, the expansion time was inferred to be approximately 53,652 years before present (ybp) for Group 1, approximately 65,043 ybp for Group 2, and approximately 76,086 ybp for Group 3. We propose that the mixed genetic pattern of the inland populations of Far East Asia is due to these expansions and that the inland populations of the region should be treated as valid subspecies that are distinguishable from other subspecies by genetic traits.

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“…The conceptual model developed to explain the Cl profile at G1 borehole is that the Cl concentrations of the aquitard porewater increase by diffusion of marine salts during the transgression events and then decrease by flushing and/or back diffusion during the following regression periods (Gao et al, 2016; Han et al, 1993). This mechanism of salinization and freshening has also been used to explain similar Cl‐depth profiles observed under a former brackish lagoon (now a freshwater lake) in the Netherlands (Beekman et al, 2011; Volker & van der Molen, 1991).…”

Section: Methodsmentioning

confidence: 99%

Groundwater Salinization and Flushing During Glacial‐Interglacial Cycles: Insights From Aquitard Porewater Tracer Profiles in the North China Plain

Han

Cao

Currell

et al. 2020

Water Resources Research

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Using natural tracer profiles to study migration of porewater salinity can help determine fluid fluxes and the timescales of salinization and freshening in coastal regions. Saline groundwater associated with evaporation and transgression events is widely distributed in the North China Plain (NCP). However, the fluid flux, time scales, and importance of different salinization processes are poorly constrained, particularly in areas beyond the limit of marine influence. Chloride (Cl) and δ 18 O profiles were obtained from two boreholes: one drilled at the edge of the piedmont alluvial fan (HS borehole) and one in the coastal region (G1 borehole). Numerical simulation of Cl and δ 18 O profiles confirmed diffusion-dominated solute transport but also indicated slow upward advective flow over geological timescales. The profile modeling at HS indicated that salinization related to evaporation has occurred since the Late Pleistocene. Assessment of alternative conceptual models indicates that intensive groundwater pumping in recent decades has also caused significant downward movement of saline porewater (e.g., movement of brackish water at~0.6 m/yr), mixing modern or Holocene water with Pleistocene water. The coastal Cl profile modeling in contrast shows that porewater salinity can be primarily attributed to salt diffusion during four transgression/regression cycles since the late Middle Pleistocene. The Cl transport appears never to have reached an equilibrium state during the glacial-interglacial cycles. This suggests not only that trapped Holocene seawater is still present and leaching into adjacent sediments but also that Pleistocene water has never been entirely flushed from the deep part of the coastal sediments.

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Conceptual Model of Underground Brine Formation in the Silty Coast of Laizhou Bay, Bohai Sea, China

Abstract: BioOne Complete (complete.BioOne.org) is a full-text database of 200 subscribed and open-access titles in the biological, ecological, and environmental sciences published by nonprofit societies, associations, museums, institutions, and presses.

Cited by 15 publications

References 11 publications

Hydrogeochemical characteristics and the genesis of the No. Lu 32 well in the Jiaodong Peninsula, China

Hydrogeochemical characteristics and the genesis of the No. Lu 32 well in the Jiaodong Peninsula, China

Genetic structure and demographic history ofLymantria dispar(Linnaeus, 1758) (Lepidoptera: Erebidae) in its area of origin and adjacent areas

Groundwater Salinization and Flushing During Glacial‐Interglacial Cycles: Insights From Aquitard Porewater Tracer Profiles in the North China Plain

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