Characteristics of coastal aquifer contamination by seawater intrusion and anthropogenic activities in the coastal areas of the Bohai Sea, eastern China

2021 ◽  
pp. 104830
Author(s):  
Xingyong Xu ◽  
Guiyao Xiong ◽  
Guangquan Chen ◽  
Tengfei Fu ◽  
Hongjun Yu ◽  
...  
Keyword(s):  
Seawater Intrusion ◽  
Coastal Aquifer ◽  
Bohai Sea ◽  
Anthropogenic Activities ◽  
Eastern China ◽  
Coastal Areas ◽  
Aquifer Contamination ◽  
The Bohai Sea

scholarly journals Decoupling and Driving Factors of Economic Growth and Groundwater Consumption in the Coastal Areas of the Yellow Sea and the Bohai Sea

2018 ◽  
Vol 10 (11) ◽  
pp. 4158 ◽  
Author(s):  
Lei Qiu ◽  
Jingyi Huang ◽  
Wenjuan Niu
Keyword(s):  
Economic Growth ◽  
Seawater Intrusion ◽  
Yellow Sea ◽  
Socioeconomic Development ◽  
Bohai Sea ◽  
Coastal Areas ◽  
Driving Factors ◽  
The Yellow Sea ◽  
The Bohai Sea ◽  
Groundwater Consumption

Seawater intrusion has occurred in the coastal area of the Yellow Sea and the Bohai Sea as early as the 1970s, and the situation is worsening, with rapid socioeconomic development in recent years. Substantial amounts of groundwater have been exploited to support socioeconomic activities, especially agricultural activities, causing a reduction in the groundwater level, and hence the intrusion of seawater. This issue seriously restricts the sustainable socioeconomic development of these coastal areas. To this end, this paper applied the improved Tapio decoupling theory to analyze the degree of decoupling, and the spatial difference between the economic growth and the groundwater consumption of the five provinces and cities in the coastal areas of the Yellow Sea and Bohai Sea in the period of 2003–2016. Based on the improved STIRPAT (Stochastic Impacts by Regression on Population, Affluence, and Technology) model and panel data, we determined the driving factors of groundwater consumption in the coastal areas of the Yellow Sea and Bohai Sea. The results demonstrated that the effective irrigation area of farmland should be expanded, new water-saving technology should be introduced, the crop planting structure should be readjusted, and the consumption of groundwater should be reduced. By implementing these measures, it would be possible to contain seawater intrusion in the coastal areas of the Yellow Sea and Bohai Sea.

scholarly journals Evaluation of Water Resources Vulnerability in the Coastal Areas of the Yellow Sea and Bohai Sea under Seawater Intrusion——A case study of Longkou City, Shandong Province

2021 ◽  
Vol 299 ◽  
pp. 01012
Author(s):  
Lei Qiu ◽  
Ying Cao ◽  
Jingyi Huang
Keyword(s):  
Water Resources ◽  
Water Resource ◽  
Seawater Intrusion ◽  
Yellow Sea ◽  
Bohai Sea ◽  
Coastal Areas ◽  
Shandong Province ◽  
The Yellow Sea ◽  
Water Resources System ◽  
Water Resources Vulnerability

In view of the increased vulnerability of water resources system caused by seawater intrusion in the coastal areas of the Yellow Sea and Bohai Sea, this paper based on the VSD(Vulnerability Scoping Diagram) model to construct the water resource vulnerability evaluation index system of “exposure-sensitivity-adaptive capacity” under seawater intrusion. Then use entropy-TOPSIS method to evaluate water resource vulnerability and divide the levels. In addition, take Longkou City of Shandong Province as an example to conduct empirical research. The results show that the water resource vulnerability of Longkou City is at a strong vulnerability level. The water resources system is under obvious pressure. Population density, per capita GDP, temperature and precipitation change are the main factors of the system pressure. Seawater intrusion has a high degree of impact on water resources vulnerability and water resource system is more sensitive to groundwater level, chloride concentration and other stimuli. The improvement of water use efficiency and scientific and technological investment contribute to the significant enhancement of the adaptability of the water resources system of Longkou City.

scholarly journals Development of Seawater Intrusion Vulnerability Assessment for Averaged Seasonality of Using Modified GALDIT Method

Water ◽  
2021 ◽  
Vol 13 (13) ◽  
pp. 1820
Author(s):  
Il Hwan Kim ◽  
Il-Moon Chung ◽  
Sun Woo Chang
Keyword(s):  
Sea Level ◽  
Seawater Intrusion ◽  
Groundwater Level ◽  
Anthropogenic Activities ◽  
Groundwater Resources ◽  
Dynamic Parameter ◽  
Management Plan ◽  
Coastal Areas ◽  
Seasonal Characteristics ◽  
Galdit Method

Climate change and anthropogenic activities are necessitating accurate diagnoses of seawater intrusion (SWI) to ensure the sustainable utilization of groundwater resources in coastal areas. Here, vulnerability to SWI was assessed by classifying the existing GALDIT into static parameters (groundwater occurrence (G), aquifer hydraulic conductivity (A), and distance from shore (D)) and dynamic parameters (height to groundwater-level above sea-level (L), impact of existing status of seawater intrusion (I), and aquifer thickness (T)). When assessing the vulnerability of SWI based on observational data (2010–2019), 10-year-averaged data of each month is used for GALDIT dynamic parameter for representing the seasonal characteristics of local water cycles. In addition, the parameter L is indicated by the data observed at the sea-level station adjacent to the groundwater level station. The existing GALDIT method has a range of scores that can be divided into quartiles to express the observed values. To sensitively reflect monthly changes in values, the range of scores is divided into deciles. The calculated GALDIT index showed that the most vulnerable month is September, due to relatively low groundwater level. The proposed method can be used to apply countermeasures to vulnerable coastal areas and build water resources management plan considering vulnerable seasons.

Organochlorine pesticides (HCHs and DDTs) in soils along the north coastal areas of the Bohai Sea, China

2010 ◽  
Vol 26 (5) ◽  
pp. 339-352 ◽  
Author(s):  
Wenyou Hu ◽  
Tieyu Wang ◽  
Jong Seong Khim ◽  
Wei Luo ◽  
Wentao Jiao ◽  
...  
Keyword(s):  
Organochlorine Pesticides ◽  
Bohai Sea ◽  
Coastal Areas ◽  
The Bohai Sea ◽  
The North

scholarly journals A Study on the Recovery of Head and the Total Dissolved Solids (TDS) from Long-Term Pressure Depressions in Low Permeable Coastal Aquifers

Water ◽  
2019 ◽  
Vol 11 (4) ◽  
pp. 777
Author(s):  
Huali Chen ◽  
Guoping Ding ◽  
Cheng Hu ◽  
Eungyu Park ◽  
Yeongkyoo Kim ◽  
...  
Keyword(s):  
Hydraulic Conductivity ◽  
Seawater Intrusion ◽  
Coastal Aquifer ◽  
Total Dissolved Solids ◽  
Coastal Areas ◽  
Spatial Behavior ◽  
Specific Storage ◽  
Dissolved Solids ◽  
Aquifer Management

Studies on the recovery of head and total dissolved solids (TDS) in a coastal aquifer system from long-term pressure depressions because of groundwater abstraction (e.g., pumping) is essential for freshwater protection and seawater-intrusion prevention in coastal areas. A 2D numerical model is applied in this paper to investigate the recovery of head and TDS in terms of long-term behavior considering low permeability media. The spatial behavior of the transition zone (TZ), which was chosen as an indicator, was studied in depth with respect to the participant hydraulic and solute-transport characteristics of the aquifer. The sensitivity of the TZ to different aquifer parameters was evaluated. The hydraulic conductivity and rainfall recharge are the two most sensitive factors that affect the location of the TZ in homogeneous cases, and the spatial structure of the hydraulic conductivity field, namely, the correlation length and variance, largely influences the sensitivity of the TZ. The required time for the complete recovery of head in the heterogeneous cases is much shorter than that in the homogeneous cases, but the TDS recovery takes much more time. When the recovery of head is 90%, low porosity and large specific storage play an important role in the location of the TZ compared to other parameters, except for the hydraulic conductivity and recharge rate. The results of this study are meaningful for coastal-aquifer management and may be instructive in the restoration of coastal areas that have experienced seawater intrusion because of the long-term overexploitation of fresh groundwater.

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