Application of factor analysis and electrical resistivity to understand groundwater contributions to coastal embayments in semi-arid and hypersaline coastal settings

Bighash, P.; Murgulet, Dorina

doi:10.1016/j.scitotenv.2015.06.077

Cited by 50 publications

(11 citation statements)

References 61 publications

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“…Geoelectric mapping helps to improve SGD field studies by, for example, informing a more representative placement of seepage meters where preferential flow paths persist (Stieglitz et al, 2007(Stieglitz et al, , 2008b. It allows upscaling of point measurements to beach-scale fluxes (Stieglitz et al, 2008a), and repeated measurements along the same transects document the temporal variability of the fresh-salt interface and of fresh groundwater and seawater recirculation fluxes (Taniguchi et al, 2008;Bighash and Murgulet, 2015). They can also be used for the establishment of a sub-surface salt balance model from which SGD fluxes can be calculated (Dimova et al, 2011;Bighash and Murgulet, 2015).…”

Section: Mapping the Subterranean Estuary With Electrical Ground Condmentioning

confidence: 99%

Submarine Groundwater Discharge: Updates on Its Measurement Techniques, Geophysical Drivers, Magnitudes, and Effects

Taniguchi

Dulai

Burnett

et al. 2019

Front. Environ. Sci.

207

143

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The number of studies concerning Submarine Groundwater Discharge (SGD) grew quickly as we entered the twenty-first century. Many hydrological and oceanographic processes that drive and influence SGD were identified and characterized during this period. These processes included tidal effects on SGD, water and solute fluxes, biogeochemical transformations through the subterranean estuary, and material transport via SGD from land to sea. Here we compile and summarize the significant progress in SGD assessment methodologies, considering both the terrestrial and marine driving forces, and local as well as global evaluations of groundwater discharge with an emphasis on investigations published over the past decade. Our treatment presents the state-of-the-art progress of SGD studies from geophysical, geochemical, bio-ecological, economic, and cultural perspectives. We identify and summarize remaining research questions, make recommendations for future research directions, and discuss potential future challenges, including impacts of climate change on SGD and improved estimates of the global magnitude of SGD.

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Section: Mapping the Subterranean Estuary With Electrical Ground Condmentioning

confidence: 99%

Submarine Groundwater Discharge: Updates on Its Measurement Techniques, Geophysical Drivers, Magnitudes, and Effects

Taniguchi

Dulai

Burnett

et al. 2019

Front. Environ. Sci.

207

143

View full text Add to dashboard Cite

show abstract

“…Study of Bighash and Murgulet (2015) showed that application of electrical resistivity to understand groundwater contributions to coastal can be done. Both analysis of geochemical data and subsurface imaging techniques identified two commonalities for the investigated system: 1) hyper-saline water occurs near the groundwater/surface water interface during wet conditions creating reverse hydraulic gradients due to density effects.…”

Section: Results Of Discusionmentioning

confidence: 99%

Detection of Ground Water Availability at Buhias Island, Sitaro Regency

Tamod

Polii

Sikome³

2016

For. Geo.

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The study aims to detect ground water availability at Buhias Island, Siau Timur Selatan District, Sitaro Regency. The research method used the survey method by geoelectrical instrument based on subsurface rock resistivity as a geophysical exploration results with geoelectrical method of Wenner-Schlumberger configuration. Resistivity geoelectrical method is done by injecting a flow into the earth surface, then it is measured the potential difference. This study consists of 4 tracks in which each track is made the stretch model of soil layer on subsurface of ground. Then, the exploration results were processed using software RES2DINV to look at the data of soil layer based on the value of resistivity (2D). Interpretation result of the track 1 to 4 concluded that there is a layer of ground water. State of dominant ground water contains the saline (brackish). Location of trajectory in the basin to the lowland areas is mostly mangrove swamp vegetation. That location is the junction between the results of the runoff of rainfall water that falls down from the hills with sea water. Bedrock as a constituent of rock layer formed from marine sediments that carry minerals salts. Keywords

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“…Low precipitation rates within the watersheds, water diversions, and river dams have resulted in absent to very limited freshwater inflows directly from the Nueces River (Murgulet et al, 2016). Oso Creek's contributions to Oso Bay and Corpus Christi Bay are largely dominated by permitted discharges (Sharma et al, 1999), including hypersaline inputs from the Barney M. Davis cooling reservoir (Bighash and Murgulet, 2015).…”

Section: Study Areamentioning

confidence: 99%

Organic matter composition and inorganic nitrogen response to Hurricane Harvey’s negative storm surge in Corpus Christi Bay, Texas

et al. 2022

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Extreme weather events, such as tropical storms and hurricanes, are known to deliver large amounts of freshwater (surface runoff) and associated inorganic and organic nutrients to estuaries and the coastal ocean, affecting water quality and nutrient budgets. However, while Hurricane Harvey produced an unprecedented 1,000-year flood event in 2017 that inundated areas north of the landfall, like the Houston/Galveston region (Texas, United States), the impact on the Corpus Christi area, south of the landfall, was an intermittent negative surge (∼0.5 m below mean sea level (MSL)), caused by the southerly direction of winds and limited freshwater inflows. With the use of pre- and post-landfall surface-water, porewater, and groundwater nutrient measurements and dissolved organic matter (DOM) molecular characterization analyses, this study assessed the influence of negative storm surge on groundwater–surface water interactions and nutrient composition. Within 2 weeks following the first landfall, the forms and inputs of inorganic and organic nutrients fluctuated significantly nearshore Corpus Christi Bay. Sudden drops in sea level were correlated with pulses of NH4+ and disproportionately more dissolved organic carbon (DOC) than dissolved organic nitrogen (DON), likely from a carbon-rich groundwater or benthic source with slightly lower labile characteristics. Recovery to MSL drove higher proportions of nitrogenous DOM and lower dissolved inorganic nitrogen (DIN) inputs. An increased presence of sulfurized DOM derived from anaerobic microbial processing of organic matter mineralization in marine sediments post-landfall was facilitated by enhanced groundwater inputs and flushing of porewater due to considerable drops in sea level and steepening hydraulic gradients toward the coast. The induced pulses of higher groundwater advective fluxes are also hypothesized to have intermittently enhanced flushing of anoxic DIN and biodegraded DOM from porewater and groundwater and suggested that dynamic hurricane-induced negative surge events affect net nutrient budgets in estuarine and coastal seas.

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Application of factor analysis and electrical resistivity to understand groundwater contributions to coastal embayments in semi-arid and hypersaline coastal settings

Cited by 50 publications

References 61 publications

Submarine Groundwater Discharge: Updates on Its Measurement Techniques, Geophysical Drivers, Magnitudes, and Effects

Submarine Groundwater Discharge: Updates on Its Measurement Techniques, Geophysical Drivers, Magnitudes, and Effects

Detection of Ground Water Availability at Buhias Island, Sitaro Regency

Organic matter composition and inorganic nitrogen response to Hurricane Harvey’s negative storm surge in Corpus Christi Bay, Texas

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