Influence of saline intrusion on the wetland ecosystem revealed by isotopic and hydrochemical indicators in the Yellow River Delta, China

Xia, Chengcheng; Liu, Guodong; Xia, Hongye; Jiang, Fangting; Meng, Yuchuan

doi:10.1016/j.ecolind.2021.108422

Cited by 16 publications

(3 citation statements)

References 73 publications

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“…During 2015-2018, the area of artificial wetland was increased by 221.22 km 2 . The main reason was that large numbers of ponds were constructed to promote economic development, resulting in a sharp increase in artificial wetland area [56]. The area of artificial wetland was decreased by 70.70 km 2 from 2019 to 2022, the main reason being that the measures of returning ponds to rivers had been extensively carried out to protect and repair the natural wetland in the YRD, which largely reduced the impacts of economic activities such as reclamation and aquaculture on the wetland ecosystem [57].…”

Section: Reasons For the Spatio-temporal Change Pa Erns Of The Wetlandmentioning

confidence: 99%

The Changes in Dominant Driving Factors in the Evolution Process of Wetland in the Yellow River Delta during 2015–2022

Wei

Guo

et al. 2023

Remote Sensing

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Most of the previous studies exploring the changing patterns of wetland in the Yellow River Delta (YRD) were conducted based on sparse time-series images, which ignored its severe environmental gradient and rapid evolution process of the wetland. The changes in the dominant factors in the evolution of the wetland in the YRD are not clear. This study used the dense time-series Sentinel-2 images to establish a wetland database of the YRD, and then analyzed the spatial distribution characteristics of, and temporal changes in, the wetland during 2015–2022. Finally, the dominant factors of the spatio-temporal evolutions of the wetland were explored and revealed. The results showed the following. (1) During 2015–2022, the wetland in the YRD was dominated by artificial wetland, accounting for 54.02% of the total wetland area in the study area. In 2015–2022, the total wetland area increased by 309.90 km2, including an increase of 222.63 km2 in natural wetlands and 87.27 km2 in artificial wetlands. In the conversion between wetland types, 218.73 km2 of artificial wetlands were converted into natural wetlands, and 75.18 km2 of natural wetlands were converted into artificial wetlands. The patch density of rivers, swamps, and salt pans increased, showing a trend of fragmentation. However, the overall degree of landscape fragmentation in wetlands weakened. The trend of changes in the number of patches and landscape shape index was the same, while the trend of changes in Shannon’s diversity index and Contagion index was completely opposite. (2) Natural factors, such as precipitation (0.51, 2015; 0.65, 2016), DEM (0.57, 2017; 0.47, 2018; 0.49, 2020; 0.46, 2021), vegetation coverage (0.59, 2019), and temperature (0.48, 2022), were the dominant influencing factors of wetland changes in the YRD. The dominant single factor causing the changes in artificial wetlands was vegetation coverage, while socio-economic factors had lower explanatory power, with the average q value of 0.18. (3) During 2015–2022, the interactions between the natural and artificial factors of the wetland changes were mostly nonlinear and showed double-factor enhancement. The interactions between temperature and sunshine hours had the largest explanatory power for natural wetland change, while interactions between precipitation and vegetation coverage, and between temperature and vegetation coverage, had large contribution rates for artificial wetland change. The interactions among natural factors had the greatest impacts on wetland change, followed by interactions between natural factors and socio-economic factors, while interactions among socio-economic factors had more slight impacts on wetland change. The results can provide a scientific basis for regional wetland protection and management.

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Section: Reasons For the Spatio-temporal Change Pa Erns Of The Wetlandmentioning

confidence: 99%

The Changes in Dominant Driving Factors in the Evolution Process of Wetland in the Yellow River Delta during 2015–2022

Wei

Guo

et al. 2023

Remote Sensing

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“…In recent years, overexploitation has led to a significant decline in groundwater levels, which has given rise to severe seawater intrusion. Such intrusion is currently accelerating and expanding, thus posing a threat to the local ecological environment and undermining the dynamic equilibrium among surface water, groundwater and seawater (Xia et al, 2021). Unless prompt and effective measures are implemented, the resulting impact could significantly impede local social and economic development.…”

Section: Vulnerability and Risks Of Water Resources And Ecosystems In...mentioning

confidence: 99%

Advancements in water and ecological risk assessment in the Yellow River Delta, North China: Implications for legal frameworks in environmental protection and public health

Huo

Yang

Lei

et al. 2023

Water & Environment J

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The Yellow River Delta (YRD) is an important agricultural and industrial region in China, yet its water resources have been increasingly affected by shortages and pollution due to human activities and the impact of climate change. This has resulted in severe damage to the water ecosystem in the YRD, thereby necessitating the adoption of effective legal measures to safeguard these resources. This paper provides a comprehensive review of recent research findings on water resources and water ecology in the YRD. Specifically, it summarizes the changes and characteristics of the geographical distribution, quantity and quality of water resources in the region and analyzes the effects of climate change, economic development and population growth on water resources. In light of the vulnerability and risks to the water resources and ecosystems in this area, this paper evaluates the impact of human activities on regional water security and proposes strategies for the sustainable utilization of water resources and the protection of public health. The insights and measures presented in this paper provide valuable guidance and references for water resource management and environmental protection in the YRD.

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“…Scientific understanding of the hydrochemical characteristics of groundwater in this area and the underlying mechanism is of great significance for ensuring sustainable utilization of groundwater resources of this wetland and other similar wetlands [21][22][23]. Therefore, the present study aimed to analyze the seasonal changes in the hydrochemical evolution of the Huixian karst wetland to identify the factors regulating the hydrochemical characteristics of groundwater.…”

Section: Introductionmentioning

confidence: 99%

Seasonal Differences in the Hydrochemical Characteristics of Karst Wetlands and the Associated Mechanisms in Huixian, China

Dan

Luo

et al. 2022

Water

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The present study aimed to identify the seasonal changes in the hydrochemical characteristics of the Huixian karst wetland and the underlying mechanism. Conventional ions and isotopes of 130 groundwater samples collected during the wet and dry seasons were analyzed. The hydrochemical characteristics of groundwater in the Huixian karst wetland were clarified using mathematical statistics and hydrochemical methods, including Durov diagrams, ionic ratios, Gibbs diagrams, and H and O isotopes. The hydrochemical evolution and sources of major ions in the Huixian karst wetland were also investigated. The results showed that cations and anions in groundwater in the study area were dominated by Ca2+ and HCO3−, respectively, sourced mainly from calcite weathering. The ions of some groundwater samples were regulated by weathering of dolomite, dolomitic limestone, and pyrite, resulting in relatively high concentrations of Mg2+ and SO42−. K+, Na+, SO42−, NO3−, and Cl− in groundwater originated from precipitation, Na+ and Cl− originated from domestic sewage, K+ was related to the application of potassium fertilizer in agriculture, and NO3− mainly originated from chemical fertilizer. Groundwater ions were primarily controlled by rock weathering, followed by evaporative concentration. The sources of major ions were dependent on the dissolution and precipitation of carbonate rock, as well as the chemical weathering of silicate rock and evaporite. Samples from the various water sources were scattered on both sides of the local meteoric water line (δD = 3.13δ18O − 13.9), which indicated isotopic composition was affected by evaporation and precipitation.

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Influence of saline intrusion on the wetland ecosystem revealed by isotopic and hydrochemical indicators in the Yellow River Delta, China

Cited by 16 publications

References 73 publications

The Changes in Dominant Driving Factors in the Evolution Process of Wetland in the Yellow River Delta during 2015–2022

The Changes in Dominant Driving Factors in the Evolution Process of Wetland in the Yellow River Delta during 2015–2022

Advancements in water and ecological risk assessment in the Yellow River Delta, North China: Implications for legal frameworks in environmental protection and public health

Seasonal Differences in the Hydrochemical Characteristics of Karst Wetlands and the Associated Mechanisms in Huixian, China

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