Evolution analysis and environmental management of intruded aquifers of the Dagu River Basin of China

Xiong, Guiyao; An, Qingxian; Fu, Tengfei; Chen, Guangquan; Xu, Xingyong

doi:10.1016/j.scitotenv.2020.137260

Cited by 42 publications

(25 citation statements)

References 28 publications

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“…Some water samples in Dagu River Basin are scattered near the mixing line of freshwater-local saltwater, which is shown in the red hollow circle. These samples are collected from the east bank of the Dagu River Basin and the north side of the cutoff wall, where residual saltwater exists [23]. The results indicate that the brackish water in these two areas is salinized by residual saltwater intrusion.…”

Section: Evolutionary Ii: Mixing Processmentioning

confidence: 98%

“…And the mixing lines are distributed closely parallel to the seawater Br − /Cl − ratio line (Figure 3). The properties of Br − are stable, and most Br − in nature is stored in the ocean; thus, Br − can be used to infer the source of salt in coastal groundwater [23].…”

Section: Sample Collectionmentioning

confidence: 99%

“…The results indicate that the brackish water in these two areas is salinized by residual saltwater intrusion. The other groundwater collected from the south of the Dagu River Basin is closely distributed to the mixing line of freshwater-seawater, which is affected by seawater intrusion [23]. The mixed level of brackish water is in the range of 0%-15%, and that of saline water is 30%-50%.…”

Section: Evolutionary Ii: Mixing Processmentioning

confidence: 99%

“…Laizhou Bay, Longkou, and Dagu River Basin are the typical areas prone to seawater intrusion in Shandong Province [7,22,23]. The types of intrusion include modern seawater, palaeosaltwater, and sea-saltwater mixed intrusions.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Elucidating the Pollution Sources and Groundwater Evolution in Typical Seawater Intrusion Areas Using Hydrochemical and Environmental Stable Isotope Technique: A Case Study for Shandong Province, China

et al. 2021

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Seawater intrusion has a serious impact on industry, agriculture, and people’s daily life. Thus, the present study was designed to elucidate the pollution sources and groundwater evolution in typical intrusion areas of Shandong Province by hydrochemistry and environmental isotope techniques. The water samples were collected to analyze the groundwater evolution under different intrusion, and groundwater evolution in the south of Laizhou Bay from 2005 to 2019. The findings indicated that the groundwater level dropping funnel caused by overexploitation was the direct causation of seawater intrusion in the three typical intruded areas. The groundwater evolution paths demonstrated that the groundwater in the south of Laizhou Bay had the fastest evolution rate and the highest degree of evolution, followed by the Dagu River Basin. The groundwater evolution extent and fitting of mixing lines indicated that the groundwater in the south of Laizhou Bay, Longkou, and Dagu River Basin was dominated by palaeosaltwater intrusion, modern seawater intrusion, and sea-saltwater mixed intrusion, respectively. Palaeosaltwater mixing produces a more severe salinization effect compared to seawater mixing. Meanwhile, the isotopes are gradually enriched with the deepening of intrusion, while the decrease of isotopes is delayed compared with the saltwater retreat. This is caused by that the stable isotopes enriched in the aquiclude due to the chemical permeation effect will be released into the aquifer after the salinity attenuates in the aquifer. The palaeosaltwater intrusion caused by anthropogenic activities has promoted serious fluorine pollution in the south of Laizhou Bay, while the groundwater nitrate pollution in Longkou was the most serious, followed by the Dagu River Basin due to high-density agricultural and domestic activity.

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Section: Evolutionary Ii: Mixing Processmentioning

confidence: 98%

Section: Sample Collectionmentioning

confidence: 99%

Section: Evolutionary Ii: Mixing Processmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Elucidating the Pollution Sources and Groundwater Evolution in Typical Seawater Intrusion Areas Using Hydrochemical and Environmental Stable Isotope Technique: A Case Study for Shandong Province, China

et al. 2021

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“…Assessment of groundwater quality is crucial for environmental management and land development [30,31]. A complex analysis not only presents the water chemistry parameters, but also combines the results of water quality index (WQI), geographic information system (GIS) and statistical analysis, with a strong emphasis on the mapping and interpretation of environmental data, which is of great importance in environmental science and environmental policy as well [32][33][34][35].…”

Section: Introductionmentioning

confidence: 99%

Assessment of Shallow Groundwater Purification Processes after the Construction of a Municipal Sewerage Network

Mester

Szabó

Balla

2021

Water

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In the present study, the impact of the construction of the sewerage network (2014) on groundwater quality was studied on the example of a middle-sized settlement in the Great Hungarian Plain and changes in water quality were assessed using GIS and multivariate statistical analysis. As a result of the pollution that has been going on for decades, the groundwater supply of the municipality has become heavily polluted. In the period before sewerage (2011–2013), clear spatial differences were shown in the degree of contamination in the area of the settlement: the degree of contamination increased in the direction of local groundwater flow. Based on our results, the construction of the sewerage network resulted in marked changes in the quality of groundwater wells. Our studies showed a clear decrease in the concentrations of inorganic pollutants (NH4+, NO2−, NO3−, PO43−). In the fifth year of the post-sewerage period (2019), the clear spatial difference between wells was eliminated. We have observed a strong descent (1.5 to 2 m) in groundwater levels in the post-sewerage period, the reason for that is clearly due to that wastewater outflow was eliminated. On this basis, it can be declared that the purification processes in the area have started, but at the same time, our results show that pollutants entering environment undergo a number of transformations and remain in the system for a long time.

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Optimizing river damming and impounding strategies to mitigate seawater intrusion in the coastal aquifer of Dagu River Basin, China

et al. 2022

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Evolution analysis and environmental management of intruded aquifers of the Dagu River Basin of China

Cited by 42 publications

References 28 publications

Elucidating the Pollution Sources and Groundwater Evolution in Typical Seawater Intrusion Areas Using Hydrochemical and Environmental Stable Isotope Technique: A Case Study for Shandong Province, China

Elucidating the Pollution Sources and Groundwater Evolution in Typical Seawater Intrusion Areas Using Hydrochemical and Environmental Stable Isotope Technique: A Case Study for Shandong Province, China

Assessment of Shallow Groundwater Purification Processes after the Construction of a Municipal Sewerage Network

Optimizing river damming and impounding strategies to mitigate seawater intrusion in the coastal aquifer of Dagu River Basin, China

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