A new idea for predicting and managing seawater intrusion in coastal channels of the Pearl River, China

Tang, Guoping; Yang, Muzhen; Chen, Xiaohong; Jiang, Tao; Chen, Tao; Xiao-hua, Chen; Fang, Hongyun

doi:10.1016/j.jhydrol.2020.125454

Cited by 13 publications

(7 citation statements)

References 45 publications

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“…Moreover, according to the National Hygienic Standard for Drinking Water (GB 5749‐2006) in China, when the salinity content in river water exceeds 250 mg/L, it cannot meet the standard for water quality and affects urban domestic water supply. In other words, the saltwater intrusion has great impact on the water supply in the Pearl River Estuary (Liu et al, 2017; Liu et al, 2019; Liu, Peng, et al, 2018; Liu, Cheng, et al, 2018; Tang et al, 2020). Therefore, the Standardized Saltwater intrusion Index was used to evaluate salinity condition in this study.…”

Section: Methodsmentioning

confidence: 99%

“…The Pearl River is the third longest river in China, and its downstream Pearl River Estuary (20 30 0 -34 42 0 N, 112 26 0 -114 24 0 E) is one of the most economically vibrant and densely populated regions in China. The region is home to a population of over 77.96 million with a GDP of CNY 11.5 trillion in 2020, and has one of the most complex river networks in the world (see Figure 1) (Liu et al, 2019;Lu et al, 2021;Tang et al, 2020;Zhou et al, 2020). The basin is situated in a tropical and subtropical climate zone with abundant rainfall, and is susceptible to the East Asian monsoon and the Southwest monsoon.…”

Section: Study Areamentioning

confidence: 99%

“…In early 2005, the strongest saltwater intrusion in 42 years occurred along the coast of Guangdong province and in the Pearl River Estuary, giving rise to the situation of 'no water to drink in the Pearl River' (Zhang et al, 2012). The concurrence of compound droughts and saltwater intrusion events in the critical zone of Pearl River Estuary amplified the impact of individual events, significantly reduced the water availability in cities, and led to severe water supply issues in agricultural production, ecosystems, and human society (Liu et al, 2014(Liu et al, , 2017(Liu et al, , 2019Tang et al, 2020). Therefore, the previous research provides a good background to develop compound drought-saltwater intrusion indices for Pearl River Estuary by using runoff as a proxy for river information and salinity as a representation of tidal information, in order to assess the severity of compound drought and saltwater intrusion.…”

Section: Study Areamentioning

confidence: 99%

See 2 more Smart Citations

Assessment of changes in severity of compound drought and saltwater intrusion events based on a multi‐index approach in Pearl River estuary

Li,

Liu,

et al. 2023

Hydrological Processes

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Global warming alters the inherent variability of climate variables and induces more frequent extremes of hydroclimatic compound events with substantial impacts. The concurrence of hydrological drought and saltwater intrusion in the estuary can have devastating effects on agricultural production, water security, and ecological health. In this study, the compound drought and saltwater intrusion extreme indices, including the Blend Drought and Saltwater intrusion Index (BDSI), the Compound drought and Saltwater intrusion Index (CDSI) and the Standardized Drought and Saltwater intrusion Index (SDSI), were constructed to monitor compound extremes in the critical zone of Pearl River Estuary during the dry season from 1999 to 2016. The results reveal that the three compound indices can effectively depict different aspects of compound drought and saltwater intrusion extreme events in the critical zone of Pearl River Estuary. Among the three indices, the SDSI performed best in depicting compound drought‐saltwater intrusion events, while the BDSI outperformed the other indices in depicting high value of Standardized Runoff Index (SRI) and Standardized Saltwater intrusion Index (SSI), and the CDSI outperformed the other indices in depicting low values of SRI and SSI. Using those developed compound indices, we found that the frequency of abnormal and moderate compound drought‐saltwater intrusion events increased from 9.26% to 12.03% during the period of 1999–2016, while severe, extreme and exceptional compound drought‐saltwater intrusion events were rare.

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Section: Methodsmentioning

confidence: 99%

Section: Study Areamentioning

confidence: 99%

Section: Study Areamentioning

confidence: 99%

See 1 more Smart Citation

Assessment of changes in severity of compound drought and saltwater intrusion events based on a multi‐index approach in Pearl River estuary

Li,

Liu,

et al. 2023

Hydrological Processes

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“…It deteriorates groundwater quality and decreases water availability, affecting industrial-agricultural production and resident living [1][2][3][4]. In recent years, the increasing groundwater exploitation due to population growth and urbanization in coastal areas has exacerbated SWI [5][6][7][8]. Therefore, investi-gating the factors and mechanisms related to SWI and groundwater evolution in intruded aquifers became important to prevent SWI and reduce its negative effects.…”

Section: Introductionmentioning

confidence: 99%

Seawater Intrusion-Retreat Processes and Groundwater Evolution in Intruded Coastal Aquifers with Land Reclamation: A Case Study of Eastern Jiangsu, China

Xiong

Chen

et al. 2022

Lithosphere

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The hydrogeochemical analysis and numerical simulation were conducted to explore the impact of land reclamation on submarine groundwater discharge and groundwater evolution in the seawater intrusion-retreat processes in eastern Jiangsu, China. The hydrogeochemical results indicated that the origin of salt in most groundwater is saltwater mixing, and weathering-dissolution of minerals enriches the salt in fresh groundwater. The evolution path of coastal groundwater in Jiangsu is Ca-Na-HCO3-Cl → Ca-Na-Cl-HCO3 → Na-Ca-Cl-HCO3 → Na-Mg-HCO3 → Na-Mg-HCO3-Cl → Na-Cl-HCO3 → Na-Cl, and the difference in groundwater evolution in different regions is obvious. The numerical simulation revealed that the land reclamation has blocked groundwater exchange and restrained the seawater intrusion. The sensitive analysis indicated that the permeability and the slope of the land reclamation have dominated the salinity distribution. And the aquifer heterogeneity promotes groundwater evolution and leads to the irregular salinity distribution of the groundwater. Moreover, the groundwater evolution in the shallow aquifer with the land reclamation shows that the residual seawater is gradually desalinating and discharged into the sea. The land reclamation is salinized by saltwater discharge and seawater intrusion together and then subsides into a stable saltwater wedge. The groundwater salinity distribution in Jiangsu is not fit seawater intrusion, which is caused by the coastline changes due to anthropogenic land reclamation and natural activities.

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“…Numerical models are highly effective in simulating saltwater intrusion, especially when the transition zone is very thick (Llopis-Albert & Pulido-Velazquez, 2014). In these models, in addition to simulating saltwater intrusion, scenarios such as reduced exploitation from pumping wells, climate change, and structural measures have been implemented to improve aquifer conditions (Luyun et al, 2011;Lu et al, 2013;Sherif et al, 2013;Filippis et al, 2016;Abdoulhalik and Ahmed, 2017;Yu and Micheal, 2019b;Tang et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

Evaluation of strategies for pumping optimization of coastal aquifers using numerical simulation and game theory

et al. 2022

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In this study, after simulating five years of saltwater intrusion with SEAWAT package in Astaneh-Kouchesfahan coastal aquifer, Iran, 19 strategies, including managerial, structural, and combined strategies, were investigated to reduce the saltwater intrusion. Since managerial solutions cause users' dissatisfaction and structural solutions increase the costs, two-player game theory was used to identify the most appropriate solution. According to the results obtained from game theory, the two strategies of artificial recharge and underground dam had the greatest impact on preventing the saltwater intrusion with the highest satisfaction of stakeholders, so that they decreased the saltwater intrusion from 740 m by 150 and 300 m, respectively, after five years.Therefore, the combined simulator-optimizer method presented in this study can evaluate various solutions, and the most appropriate solution can be proposed with the lowest cost and maximum satisfaction for the sustainable management of coastal aquifers.

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A new idea for predicting and managing seawater intrusion in coastal channels of the Pearl River, China

Cited by 13 publications

References 45 publications

Assessment of changes in severity of compound drought and saltwater intrusion events based on a multi‐index approach in Pearl River estuary

Assessment of changes in severity of compound drought and saltwater intrusion events based on a multi‐index approach in Pearl River estuary

Seawater Intrusion-Retreat Processes and Groundwater Evolution in Intruded Coastal Aquifers with Land Reclamation: A Case Study of Eastern Jiangsu, China

Evaluation of strategies for pumping optimization of coastal aquifers using numerical simulation and game theory

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