scispace - formally typeset
Search or ask a question

How has submarine groundwater discharge evolved over time and what are the potential implications for coastal ecosystems? 

Groundwater
Estuary
Precipitation
Seawater
Submarine groundwater discharge
Best insight from top research papers

Submarine groundwater discharge (SGD) has evolved over time due to various factors such as climate change, density-driven circulation, nutrient supply, and microbial interactions. Climate change impacts FSGD dynamics, with projections indicating more discontinuous and intense discharge events . Long-term circulation processes driven by density differences contribute significantly to major element fluxes into the ocean through SGD . Additionally, reducing substances in SGD can lead to oxygen depletion in coastal waters, affecting marine organisms and ecosystems . The complexity of SGD detection and quantification underscores the need for diverse methodologies, including hydrogeological approaches and geochemical tracers, to study its spatial and temporal variability and implications for coastal ecosystems . Groundwater-borne microbes discharged through SGD can influence coastal seawater microbial communities, impacting nutrient cycling and ecosystem dynamics .

Answers from top 5 papers

More filters
Papers (5)Insight
Open access•Posted Content•DOI
Allochthonous groundwater microorganisms affect coastal seawater microbial abundance, activity and diversity
Keren Yanuka-Golub, Natalia Belkin, Nurit Weber, Y. Levy, Itay J. Reznik, Maxim Rubin-Blum, Eyal Rahav, Yael Kiro 
17 May 2023-bioRxiv
Submarine groundwater discharge (SGD) delivers nutrients and allochthonous microbes to coastal waters, impacting microbial abundance, diversity, and activity, influencing coastal ecosystem dynamics and biogeochemical cycles.
Posted Content•DOI
Assessing different methods to quantify Submarine Groundwater Discharge
Valentí Rodellas, Marc Diego-Feliu, Aaron Alorda-Kleinglass, María del Mar Rodríguez Zárate 
15 May 2023
Submarine Groundwater Discharge (SGD) quantification methods have evolved, impacting coastal ecosystems. Various techniques like seepage meters and geochemical tracers help assess SGD's role in coastal eutrophication.
Posted Content•DOI
The Direct Effect of Submarine Groundwater Discharge on the Concentration of Dissolved Oxygen in Estuarine and Coastal Waters
Willard S. Moore
15 May 2023
Submarine groundwater discharge (SGD) impacts coastal ecosystems by introducing reducing substances that deplete dissolved oxygen, potentially causing biological stress and hypoxic conditions, as observed in various regions.
Posted Content•DOI
Temporal variations of groundwater tables and implications forsubmarine groundwater discharge: a case study the Mediterranean Spanish coast
Albert Folch, L. PIRES 
15 May 2023
Submarine groundwater discharge (SGD) dynamics may change due to climate change, leading to more discontinuous and intense freshwater discharge events, impacting saltwater intrusion and coastal biogeochemical cycles.
Posted Content•DOI
The role of coastal aquifers in the composition of major elements in the ocean
Wojciech Sadurski
15 May 2023
Submarine groundwater discharge has evolved with short-term and long-term circulation mechanisms affecting major elements fluxes, potentially impacting coastal ecosystems through element modifications and fluxes.

Related Questions

When has submarine groundwater discharge discovered for the first time?4 answersSubmarine groundwater discharge (SGD) was first discovered to have a significant impact on coastal ocean acidification rates in Hong Kong's coastal waters, as highlighted in a study by Hanson and Sanders. Additionally, investigations in the Coleroon River estuary in India by Prakash et al. revealed the influence of SGD on trace element fluxes, emphasizing the potential consequences of increasing trace elements on harmful algal blooms and eutrophication. Furthermore, studies in Jiaozhou Bay, China, by Luo et al. utilized naturally occurring isotopes to assess SGD rates, indicating that SGD rates were about 8-14 times higher than local river discharge rates, emphasizing the substantial influence of SGD on nutrient levels and water eutrophication in coastal waters. These studies collectively underscore the crucial role of SGD in various coastal environments and its implications on water quality and ecosystem health.
What is the importance of coastal and marine ecosystems?5 answersCoastal and marine ecosystems play a crucial role in providing essential services to humanity. These ecosystems, covering a small percentage of the Earth's surface, are vital for food security, raw materials for medicines, and economic activities like fisheries and tourism. They offer a wide array of ecosystem services, including provisioning services like seafood supply, cultural services promoting human health and wellbeing, and regulating services such as climate regulation and biodiversity conservation. However, these ecosystems face numerous threats like overexploitation, pollution, and climate change, impacting biodiversity and ecosystem balance. Sustainable management practices are crucial to safeguard these ecosystems and ensure the long-term health of marine environments, sustaining benefits for millions who rely on marine resources.
Effect of climate change on coastal aquifers in arid regions ?4 answersClimate change has significant impacts on coastal aquifers in arid regions. The rise in sea levels due to global warming leads to land submergence and an increase in hydraulic head of seawater at the seaside boundary. This results in the loss of land and degradation of groundwater quality in coastal areas. Groundwater resources in these aquifers are also at risk of depletion due to extensive pumping. The severity of these impacts varies depending on the specific aquifer. For example, in the Nile Delta aquifer, vast areas will be submerged by seawater due to its low altitude and flat nature. Numerical simulations show that both the Nile Delta aquifer and the Wadi Ham aquifer in the United Arab Emirates will be affected, but to different degrees.
What are the different types of groundwater discharges?5 answersGroundwater discharges can occur in various forms. One form is the flow through an immobile granular matrix, known as suffusion and suffosion. Suffusion involves sediment movement that does not impact soil stability, while suffosion creates changes to soil stability and volume. Another form is the flow through preferential pathways, often treated as pipes. Preferential flow can arise from cracks in cohesive materials or localized fluidization of non-cohesive soils, leading to sand boils. Submarine groundwater discharge (SGD) is another type of groundwater discharge, where groundwater flows from continental margins to the coastal ocean. SGD includes both fresh groundwater from aquifer recharge and seawater recirculation through the coastal aquifer. Groundwater discharge can also occur along channelized streams, with diffuse discharge occurring where the stream is incised into the regional gravel aquifer, and focused discharge occurring where the channel intersects preferential pathways within the confining unit.
What are the effects of climate change on seawater intrusion in coastal regions?5 answersSea level rise (SLR) due to climate change can lead to seawater intrusion in coastal regions. SLR affects coastal aquifers, causing coastal erosion and inundation. The halosteric effect, which considers changes in seawater density, significantly influences sea level changes. Studies have shown that SLR projections for the year 2050 range from 8.64 cm to 12.96 cm under different emission scenarios. Seawater intrusion can have adverse effects on freshwater resources and agricultural production. However, simulations have indicated that the effect of SLR on seawater intrusion may be negligible in some cases. Integrated management approaches, such as placing aquifer fill materials along the shoreline and implementing physical surface barriers, can help retard seawater intrusion and protect fresh groundwater bodies. Numerical modeling has been used to understand and predict seawater intrusion, and future scenarios suggest that high sea level rise predictions can severely affect coastal ecosystems. Salinity intrusion into rivers is also a concern, with projected impacts on agricultural areas.
What is the role of groundwater extraction in subsidence?3 answersGroundwater extraction plays a significant role in subsidence. In many cities, such as Lahore, Hanoi and Bangkok, Kolkata, and Wuxi City, excessive groundwater pumping has led to land subsidence. The extraction of groundwater causes the decline in the piezometric head, resulting in the compaction of aquifer systems and subsequent subsidence. The areas with high groundwater discharge are particularly prone to subsidence, while the surroundings may experience uplift. The subsidence is more pronounced in areas with alluvial and clay deposits and large building structures. The spatial characteristics of subsidence are influenced by factors such as the distribution of groundwater levels, thickness and compressibility of different strata, distance from the pumped aquifer, and distribution of pumping. To mitigate subsidence, it is necessary to control groundwater pumping and reduce extraction.

See what other people are reading

What is the impact of farmyard manure on the soil's 15N stable isotope signature?
5 answers
Farmyard manure application significantly impacts the soil's 15N stable isotope signature by enriching it with higher values. Studies show that the application of manure leads to an increase in the δ15N values of nitrate in the soil, resembling the isotopic composition of the manure itself. The long-term addition of farmyard manure enhances soil carbon and nitrogen cycling, with higher rates of nutrient turnover and microbial activity under high manure treatments. Additionally, the decomposition of organic sulfur compounds from manure application results in increased sulfur bioavailability in the soil, affecting the soil's sulfur cycling dynamics. Overall, farmyard manure application plays a crucial role in altering the soil's isotopic composition and nutrient cycling processes.What are recent advances in monitoring for CSO events in the environement?
5 answers
Recent advances in monitoring for Combined Sewer Overflow (CSO) events in the environment include the utilization of various sewage markers, pharmaceuticals, and personal care products (PPCPs) to evaluate fecal contamination levels in water bodies. Additionally, the integration of artificial intelligence (AI) with Industrial Internet of Things (IIoT) frameworks enables real-time processing of massive IIoT data for smart city monitoring, allowing for the automatic categorization of events and objects captured from IIoT data. Moreover, the development of a complex event processing (CEP) engine facilitates real-time anomaly detection in environmental monitoring systems, enhancing the ability to ingest heterogeneous datastreams with scalable performance. These advancements in monitoring technologies contribute to more efficient and effective detection and management of CSO events, ultimately aiding in maintaining environmental quality and public health.What are recent studies in monitoring for CSO events using chemical contamination in the environement?
5 answers
Recent studies have focused on monitoring combined sewer overflow (CSO) events using chemical contamination in the environment. One study monitored surface water quality in the Sumida river estuary of Tokyo bay after rainfall events, identifying high concentrations of sewage markers like Escherichia coli and pharmaceuticals. Another study developed a living bioelectronic sensor platform using synthetic biology and materials engineering to detect chemicals in riverine water rapidly, showcasing the potential for minute detection times in environmental monitoring. Additionally, research has explored monitoring toxic substance pollution in chemical plants through big data technology, emphasizing the importance of intelligent monitoring systems for harmful gases in chemical production processes to ensure safe operations and increase efficiency in chemical companies.What are the primary causes of deforestation in tropical forests?
5 answers
The primary causes of deforestation in tropical forests include industrial mining, land use activities like livestock ranching and illegal crop cultivation, armed conflict, and agricultural expansion. Industrial mining leads to direct forest loss in specific countries and indirect deforestation in two-thirds of tropical countries. Land use activities such as livestock ranching, illegal crop cultivation, and agriculture significantly drive deforestation and carbon storage changes in regions affected by deforestation, with forest regeneration playing a role in carbon sequestration. Additionally, armed conflict, population growth, and policy enforcement also contribute to deforestation, with some factors having direct positive impacts while others have indirect negative effects on deforestation rates. These factors collectively highlight the complex interplay of socio-ecological drivers leading to deforestation in tropical forests.What are the problems of habitat destruction in fisheries?
5 answers
Habitat destruction in fisheries poses significant challenges, impacting both fish stocks and the ecosystems they rely on. Destructive fishing practices can lead to irreversible habitat loss, hindering fish stock regeneration and sustainability. The use of various fishing gears, such as fish traps and gill nets, can directly damage habitats, affecting the stability and sustainability of fish resources. Additionally, the loss of intertidal habitats in estuaries due to environmental fluctuations and human activities has been substantial, affecting the nursery and feeding grounds of economically important fish species. Incorporating habitat considerations into fisheries management is crucial, as neglecting these impacts can lead to detrimental consequences for both fish stocks and the stakeholders involved in the fishery industry.Where in SA is the study area located?
5 answers
The study area is situated in South Australia's Northern Agricultural District (NAD), spanning two farms near Jamestown to the north, Spalding to the south, and Adelaide further south. It covers 121 hectares on the eastern side of a valley drained by the Freshwater Creek, characterized by a prominent 12-meter erosional gully. The toposequence in the area extends 1,500 meters with a relief difference of 100 meters, underlain by a basement of various geological formations. Historically, the region was part of the broader land known as Syria, encompassing present-day Syria, Lebanon, Jordan, and Palestine, reflecting its ancient connections across Asia, Africa, and Europe.What are the patterns of reccent hydrological droughts in Europe ?
5 answers
Recent patterns of hydrological droughts in Europe show complex spatial variations. Studies indicate bidirectional changes in monthly streamflow, with negative trends prevalent in central and southern Europe and positive trends in the north. Additionally, projections suggest that with increasing global warming levels, the Mediterranean region may experience stronger droughts, while the Boreal region could see a reduction in drought occurrences. Furthermore, the importance of different hydrometeorological drivers varies by event magnitude, with rainfall deficit and cold snow season droughts being dominant in different parts of Europe and seasons. These findings highlight the regional character of hydrological drought behavior in Europe, making it challenging to implement effective strategies at a continental level.Can biotin be found dissolved in the ocean?
4 answers
Yes, biotin can be found dissolved in the ocean. Research indicates that biotin concentrations in seawater exhibit significant variability, with levels ranging from less than 0.1 ng/l to as high as 57.9 ng/l in surface waters, particularly in coastal regions. Biotin is essential for many marine microorganisms, some of which exhibit biotin auxotrophy and rely on external sources for this micronutrient. Various methods have been developed to detect biotin in seawater, such as microbiological assays using marine bacteria like Achromobacter sp. and Amphidinium carteri, which are sensitive to biotin concentrations in the range of 0.1 to 8.0 ng/l and 0.2–6.0 ng/l, respectively. These findings highlight the presence and importance of biotin in the marine environment.How shrinkage of organic deposites lead to land subsidence?
5 answers
Shrinkage of organic deposits contributes significantly to land subsidence by causing compression and consolidation of sediments. This shrinkage is often induced by factors like oxidation and organic matter mineralization. When organic sediments undergo shrinkage, they lose volume, leading to a decrease in the overall elevation of the land surface. Studies have shown that the major part of subsidence in areas like peatlands can be attributed to shrinkage of dredged sediments, with minimal changes in organic matter content. Additionally, the type of organic matter in these sediments can evolve from humification to mineralization, influencing the subsidence process. Therefore, understanding and managing the shrinkage of organic deposits is crucial in addressing and potentially reversing land subsidence issues in various regions.How to simulate the climate change impacts on urban heat island?
10 answers
Simulating the climate change impacts on urban heat islands (UHIs) involves a multifaceted approach that integrates various modeling techniques and data sources to assess how urban areas might respond to future climatic conditions. One effective method is the use of 3D Computational Fluid Dynamics (CFD) simulations, which can model urban microclimate and pedestrian thermal comfort by incorporating high-resolution field and laboratory measurements, as well as predicted meteorological conditions from Regional Climate Models (RCMs). Similarly, the coupled hydrological-energy budget model, Poli-HE, simulates surface water and energy fluxes, highlighting the UHI effect by comparing land surface temperatures (LST) between urban and green areas. The Weather Research and Forecasting Model (WRF) with Advanced Research WRF (ARW) core is another tool used to investigate climate change impacts on UHI, offering detailed predictions for urban and non-urban areas through high-resolution simulations. The CNRM-AROME Convection-Permitting Regional Climate Model (CP-RCM), coupled with the Town Energy Balance (TEB) urban canopy model, explicitly accounts for physical urban-climate processes, providing insights into the seasonal variability and intensity of UHIs. Remote sensing thermal imagery and in-situ measurements, combined with climate change scenarios and models, also contribute to understanding and predicting future UHI intensity. Comprehensive assessments of UHI impacts on buildings and vulnerable populations can be achieved through surveys, field measurements, and multi-scale climatic modeling, from global and regional climates to urban microclimate and building scale simulations. Bias-corrected and downscaled climate model data, analyzed using the quantile mapping technique, offer another method to represent UHIs in future climates by focusing on temperature differences between rural and urban sites. The mesoscale Weather Research and Forecasting Model (WRF) tool, coupled with urban canopy models (UCMs), assesses heat emission and moisture fluxes from urban boundaries to the atmosphere, providing reliable climate simulations. Urban planning strategies, evaluated through mesoscale numerical weather prediction systems, can mitigate UHI effects and reduce building energy consumption. Lastly, the ENVI-met simulation method models potential strategies to predict UHI, emphasizing the importance of using local surface materials for accurate simulation results.How does the mounting pressure from climate change impact the occurrence and spread of heatwaves and droughts?
4 answers
The mounting pressure from climate change significantly impacts the occurrence and spread of heatwaves and droughts globally. Studies reveal that compound drought and heatwave events are becoming more frequent and severe due to anthropogenic warming, with regions like East Africa, North Australia, and Central Europe experiencing the greatest increases in frequency. The synchronization between heatwaves and flash droughts has intensified since the mid-1990s, particularly affecting regions like northeastern, northern, and southwestern areas. In Poland, the simultaneous occurrence of heatwaves and droughts has increased notably, attributed to rising evapotranspiration and decreasing water balance, leading to more stressful growing seasons. Understanding and predicting these extreme events are crucial, with machine learning models being developed to forecast heatwaves and subsequent droughts, emphasizing the importance of early warning systems for public safety and preparedness.