Desalinization and Salinization: A Review of Major Challenges for Coastal Reservoirs

Jin, Guangqiu; Mo, Yuming; Li, Mengdi; Tang, Hongwu; Qi, Yongsheng; Li, Ling; Barry, David Andrew

doi:10.2112/jcoastres-d-18-00067.1

Cited by 15 publications

(2 citation statements)

References 50 publications

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“…Seawater intrusion occurs worldwide (Robinson et al, 2018;Werner et al, 2013). Various strategies (e.g., groundwater extraction reduction, artificial recharge, and/or engineering measures such as subsurface barriers) are used to mitigate seawater intrusion in coastal areas (Hussain et al, 2019;Jin et al, 2019). Among them, artificial recharge is practical and cost effective and is thus commonly adopted (Eslamian, 2014).…”

Section: Discussionmentioning

confidence: 99%

Thermal Effects on Flow and Salinity Distributions in Coastal Confined Aquifers

Xin

Nguyen

et al. 2020

Water Resources Research

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Coastal aquifers provide an important hydrologic connection between terrestrial freshwater and oceanic seawater. Understanding the water flow and salinity distributions in those aquifers is essential to manage seawater intrusion and regional groundwater resources. For the last 50 yr, these processes have been extensively examined; however, previous studies typically assumed isothermal conditions and overlooked groundwater-seawater temperature contrasts, as commonly found along the global coastline. Here, we validated a solute and heat transport model against laboratory experiments and then revisited the classical Henry problem for coastal confined aquifers. We found that as the seawater temperature increases or freshwater temperature decreases, the freshwater-seawater interface retreats seaward and thus the freshwater storage increases. This occurs as a result of temperature-induced changes to the fluid density and aquifer hydraulic conductivity. Furthermore, double diffusion of salt and heat can induce two circulation cells in opposing directions in the saltwater wedge once the seawater temperature exceeds that of groundwater by a certain extent. Consequently, the circulating seawater flux and associated travel time change dramatically compared with isotheral conditions. Overall, the effect of thermal forcing can be significant, as demonstrated by a sensitivity analysis considering a large range of groundwaterseawater temperature contrasts. These results highlight the impact of changing thermal regimes on the flow and salinity distributions in coastal confined aquifers and provide guidance for better assessment of water resources in coastal zones. Plain Language Summary Coastal zones are often densely populated with associated significant economic activity. Groundwater in coastal aquifers provides an essential freshwater resource for domestic and industrial use as well as food production. Intensive human activities and climate change cause water regime shifts and thus threaten water security in coastal areas. Coastal water resource assessments often overlook groundwater-seawater temperature contrasts, even though such contrasts are globally ubiquitous. Here, we show those assessments could be improved with thermal effects considered as temperature contrasts can markedly influence salinity distributions and water circulations in coastal aquifers. The results provide guidance for better assessment of water resources in coastal zones. Water temperature affects oceanland exchange and various biogeochemical processes, which should be considered in future studies including climate change evaluations.

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Section: Discussionmentioning

confidence: 99%

Thermal Effects on Flow and Salinity Distributions in Coastal Confined Aquifers

Xin

Nguyen

et al. 2020

Water Resources Research

Self Cite

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“…As groundwater moves through rocks, its chemical composition normally changes, and the longer groundwater remains in contact with aquifer rocks the greater the amount of material it will take into the solution [3]. There are many obstacles in water supply systems that use groundwater in coastal aquifers, and seawater intrusion is a major one [4][5][6][7], referring to varying degrees of mixing saltwater with groundwater. Seawater intrusion is higher in summer months when water consumption rises due to the duration of the tourist season, and at the same time recharge of the aquifer is decreased during the dry summer season [4].…”

Section: Introductionmentioning

confidence: 99%

Hydrochemical Indicators Analysis of Seawater Intrusion in Coastal Karstic Aquifers on the Example of the Bokanjac-Poličnik Catchment Area in Zadar, Croatia

et al. 2021

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Monitoring and detection of seawater intrusion in coastal aquifers in Croatia are one of the water management measures that attempt to notice an increase in salinity in time. Bokanjac-Poličnik is the coastal aquifer in Croatia that is at the risk of seawater intrusion. In that area, analysis of hydro-chemical indicators will be conducted due to the occasional seawater intrusion that occurs on wells that are included in the water supply system for the City of Zadar and surrounding villages. Due to the increased exploitation during the tourism season in summer and climate changes, salinization process is more intense. The presented results indicate that two of four wells on the case study area are under the influence of salt marine water.

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Effects of the Deep Pool on Groundwater Flow and Salinization in Coastal Reservoir and Adjacent Aquifer

Jin

Zhang

et al. 2021

Water Resour Manage

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Desalinization and Salinization: A Review of Major Challenges for Coastal Reservoirs

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 50 publications

Thermal Effects on Flow and Salinity Distributions in Coastal Confined Aquifers

Thermal Effects on Flow and Salinity Distributions in Coastal Confined Aquifers

Hydrochemical Indicators Analysis of Seawater Intrusion in Coastal Karstic Aquifers on the Example of the Bokanjac-Poličnik Catchment Area in Zadar, Croatia

Effects of the Deep Pool on Groundwater Flow and Salinization in Coastal Reservoir and Adjacent Aquifer

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