The social implications of Submarine Groundwater Discharge from an Ecosystem Services perspective: A systematic review

Alorda-Kleinglass, Aaron; Ruíz-Mallén, Isabel; Diego-Feliu, Marc; Rodellas, Valentí; Bruach-Menchén, Joan Manuel; García-Orellana, Jordi

doi:10.1016/j.earscirev.2021.103742

Cited by 28 publications

(12 citation statements)

References 140 publications

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“…The supply of solutes to coastal waters through SGD directly impact the productivity of coastal ecosystems [42][43][44]. SGD can also supply dissolved contaminants to the coastal ocean derived from anthropogenic sources (e.g., agriculture, industrial, mining activities, domestic wastewaters) (e.g., [45,46]), which can endanger the coastal ecosystems and the well-being of local population living around them. In this regard, societies living around SGD-influenced zones may benefit or be harmed by the services and goods provided by the ecosystems influenced by SGD [45].…”

Section: Discussionmentioning

confidence: 99%

“…SGD can also supply dissolved contaminants to the coastal ocean derived from anthropogenic sources (e.g., agriculture, industrial, mining activities, domestic wastewaters) (e.g., [45,46]), which can endanger the coastal ecosystems and the well-being of local population living around them. In this regard, societies living around SGD-influenced zones may benefit or be harmed by the services and goods provided by the ecosystems influenced by SGD [45]. We showed that some of the identified potential SGD sites are located in national environmental protected areas.…”

Section: Discussionmentioning

confidence: 99%

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Thermal-Based Remote Sensing Solution for Identifying Coastal Zones with Potential Groundwater Discharge

Londoño-Londoño

Melo

Nascimento

et al. 2022

JMSE

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Submarine Groundwater Discharge (SGD) is an essential process of the hydrological cycle by hydraulically connecting the land and sea. However, the occurrence, importance and effects of SGD remain largely underexplored. Here, we developed and validated a straightforward tool for mapping potential SGD areas in coastal ecosystems of Portugal. Our approach was based on the premise that relatively cooler groundwater discharging to warmer coastal waters manifests in the thermal band of satellite imagery acquired during the summer months. We then used Landsat 8 thermal infrared imagery (TIR) to derive sea surface temperature and standardized temperature anomalies maps. The results confirmed the capacity of TIR remote sensing for identifying SGD areas. The thermal analysis enabled us to acquire a useful visual-spatial correlation between the location of thermal anomalies and potentiometric surfaces of coastal aquifers. This way, over 20 potential SGD areas were identified. Our study makes an important contribute to our current SGD research status by developing a cost-efficient tool which can be used as a first level approach for large areas. Further investigation is needed to quantify the SGD and its potential effect in the receiving ecosystems, especially those located within environmentally protected areas.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Thermal-Based Remote Sensing Solution for Identifying Coastal Zones with Potential Groundwater Discharge

Londoño-Londoño

Melo

Nascimento

et al. 2022

JMSE

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“…(2012), W. S. Moore and Joye (2021), Alorda‐Kleinglass et al. (2021), Santos, Chen, et al. (2021), and Garcia‐Orellana et al.…”

Section: Introductionmentioning

confidence: 99%

Surface Water and Groundwater Interactions in Salt Marshes and Their Impact on Plant Ecology and Coastal Biogeochemistry

Xin

Wilson

Shen

et al. 2022

Reviews of Geophysics

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Salt marshes are highly productive intertidal wetlands providing important ecological services for maintaining coastal biodiversity, buffering against oceanic storms, and acting as efficient carbon sinks. However, about half of these wetlands have been lost globally due to human activities and climate change. Inundated periodically by tidal water, salt marshes are subjected to strong surface water and groundwater interactions, which affect marsh plant growth and biogeochemical exchange with coastal water. This paper reviews the state of knowledge and current approaches to quantifying marsh surface water and groundwater interactions with a focus on porewater flow and associated soil conditions in connection with plant zonation as well as carbon, nutrients, and greenhouse gas fluxes. Porewater flow and solute transport in salt marshes are primarily driven by tides with moderate regulation by rainfall, evapotranspiration and sea level rise. Tidal fluctuations play a key role in plant zonation through alteration of soil aeration and salt transport, and drive the export of significant fluxes of carbon and nutrients to coastal water. Despite recent progress, major knowledge gaps remain. Previous studies focused on flows in creek‐perpendicular marsh sections and overlooked multi‐scale 3D behaviors. Understanding of marsh ecological‐hydrological links under combined influences of different forcing factors and boundary disturbances is lacking. Variations of surface water and groundwater temperatures affect porewater flow, soil conditions and biogeochemical exchanges, but the extent and underlying mechanisms remain unknown. We need to fill these knowledge gaps to advance understanding of salt marshes and thus enhance our ability to protect and restore them.

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“…Submarine groundwater discharge (SGD) -the flow of terrestrial and marine groundwater to the coastal ocean -is one of the primary processes regulating the transfer of solutes from land to ocean (Santos et al, 2021). The significance of this process at local, regional and global scale stems mainly from its role in modulating the water and chemical budgets of oceans, controlling coastal ecosystems, and contributing to the well-being of coastal societies (Alorda-Kleinglass et al, 2021;Lecher et al, 2015;Luijendijk et al, 2020). In the last three decades, there have been many studies focusing on quantifying SGD and associated solute fluxes in multiple sites across the globe, including coves, bays, estuaries, and entire basins (e.g.,…”

Section: Introductionmentioning

confidence: 99%

Extreme precipitation events induce high fluxes of groundwater and associated nutrients to the coastal ocean

Diego-Feliu

Rodellas

Alorda-Kleinglass

et al. 2022

Preprint

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Abstract. Current Submarine Groundwater Discharge (SGD) studies are commonly conducted under aquifer baseflow conditions, neglecting the influence of episodic events that can significantly increase the supply of nutrients and water. This limits our understanding of the social, biogeochemical, and ecological impacts of SGD. In this study, we evaluated the influence of an extreme precipitation event (EPE) on the magnitude of both the terrestrial and marine components of SGD. To do so, three seawater sampling campaigns were performed at a Mediterranean ephemeral stream-dominated basin after an extreme precipitation event (~90 mm in few hours) and in baseflow conditions. Results indicate that the groundwater flows of terrestrial and marine SGD after the extreme precipitation event were 1 order of magnitude higher than those in baseflow conditions. SGD induced by extreme precipitation events, which only take place a few days per year, represented up to one third of the annual discharge of groundwater and associated nutrients at the study site. This work accentuates the need to account for episodic increases in the supply of water and nutrients when aiming at providing reliable annual SGD estimates, particularly in the current context of climate change, since the occurrence of such events is expected to increase worldwide.

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The social implications of Submarine Groundwater Discharge from an Ecosystem Services perspective: A systematic review

Cited by 28 publications

References 140 publications

Thermal-Based Remote Sensing Solution for Identifying Coastal Zones with Potential Groundwater Discharge

Thermal-Based Remote Sensing Solution for Identifying Coastal Zones with Potential Groundwater Discharge

Surface Water and Groundwater Interactions in Salt Marshes and Their Impact on Plant Ecology and Coastal Biogeochemistry

Extreme precipitation events induce high fluxes of groundwater and associated nutrients to the coastal ocean

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