Exploration of the effects of storm surge on the extent of saltwater intrusion into the surficial aquifer in coastal east-central Florida (USA)

Xiao, Han; Wang, Dingbao; Medeiros, Stephen C.; Bilskie, Matthew V.; Hagen, Scott C.; Hall, Carlton R.

doi:10.1016/j.scitotenv.2018.08.199

Cited by 39 publications

(16 citation statements)

References 34 publications

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“…Also, in line with all previous studies (e.g. Narayan et al 2007;Yang et al 2013 andXiao et al 2019), the impacts of tidal fluctuations on the interface of saltwater and freshwater are small and are neglected. A brief description of the numerical modeling processes is presented in the (Suozzi 2005) following.…”

Section: Numerical Simulationssupporting

confidence: 80%

A risk-based groundwater modeling framework in coastal aquifers: a case study on Long Island, New York, USA

2020

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A methodology is proposed to define indices for quantifying risks under the threat of reducing in groundwater levels, the existence of saltwater intrusion (SWI), and an increasing nitrate contamination load in submarine groundwater discharge (SGD). The proposed methodology considers coastal regions under geological heterogeneity and it is tested on a groundwater system in Nassau County of Long Island, New York (USA). The numerical model is constructed with the SEAWAT code. The parameter uncertainty of this model is evaluated by coupling the Latin hypercube sampling method (as a sampling algorithm) and Monte Carlo simulation to consider the uncertainty in both hydraulic conductivity and recharge rate. The indices are presented in spatial maps that classify areas of risk to potential threats. The results show that two of the water districts have a high risk under conditions of decreasing groundwater level. Salinity occurs in the southern and southwestern parts of the Nassau County aquifer and a considerable area of high risk of SWI is identified. Furthermore, the average SGD rate with the associated fluxes of nitrate is estimated as 81.4 million m3/year (average 0.8 tons of nitrate through SGD per year), which can adversely affect the quality of life in the local coastal ecosystems. The framework developed in this study could help the water district managers to identify high-risk areas for short-term and long-term planning and is applicable to other coastal settings.

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Section: Numerical Simulationssupporting

confidence: 80%

A risk-based groundwater modeling framework in coastal aquifers: a case study on Long Island, New York, USA

2020

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“…In coastal areas, due to the change in groundwater hydrodynamic conditions, the process of seawater invaded into freshwater aquifers on land is called seawater intrusion [10]. Seawater intrusion can be generally divided into two categories according to its formation cause, invasion route, and occurrence process: The first is the impact of various natural factors (such as climate change or sea level rise) and human factors (mainly excessive groundwater exploitation), which causes seawater to invade the coastal freshwater aquifer through the groundwater system, and generally occurs relatively slowly, causing a gradual disaster; the other type mainly occurs in estuarine areas, through the ocean surface, upstream invasion along the river, especially affected by storm surge, sea flow, tide, current, wind direction, and wind speed and other factors, and generally occurs more suddenly, causing a sudden disaster [11][12][13]. Seawater intrusion will cause great changes in the chemical composition of groundwater, resulting in a series of environmental geological problems, such as salinization of freshwater, salinization of soil, and deterioration of water quality [14,15].…”

Section: Introductionmentioning

confidence: 99%

Hydrochemical Characteristics and Irrigation Suitability Evaluation of Groundwater with Different Degrees of Seawater Intrusion

Wang

Liu

et al. 2020

Water

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Groundwater in coastal aquifers is often affected by seawater intrusion, resulting in water quality deterioration. Using groundwater influenced by seawater intrusion for irrigation can lead to crop failure, erosion of machinery and pipes, and adverse effects on farming. In this study, the results of water testing, methods of statistical analysis, ion ratios, a Piper diagram, and a variety of groundwater irrigation suitability models were used to analyze the chemical composition of groundwater and the influence of seawater intrusion. The result shows that the content of Na+, K+, Ca2+, Mg2+, Cl−, and SO42− in groundwater would increase due to seawater intrusion, and the increasing trend was consistent with the freshwater–seawater mixing line. With the deepening of seawater intrusion, the hydrochemical type gradually changes from Ca-HCO3·Cl to Na·Mg-Cl·SO4 and then to Na-Cl type, and the source of hydrochemical composition changes from “Rock Weathering Dominance” to “Evaporation Dominance”. When the Cl− concentration is greater than 7.1 meq/L, groundwater will corrode pipelines and instruments; when greater than 28.2 meq/L, excessively high salinity of groundwater will have adverse effects on planting; and when greater than 14.1 meq/L, the groundwater hardness is too high, which may make the groundwater unsuitable for cultivation.

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“…Strong winds can damage both aboveground buildings housing water supply equipment and belowground infrastructure, such as water pipes through tree uprooting. Storm surges from cyclones have been shown to result in the salinization of both surface water and coastal aquifers, and in some cases, models predict that it might take years before infiltrating rainfall flushes infiltrated saltwater to surrounding water bodies [70,71]. Major metropolitan areas in the Philippines and Vietnam that are located on coastlines already experience salinization due to massive groundwater pumping [72,73].…”

Section: Um: Additional Effect Of Cyclones On the Philippines And Viementioning

confidence: 99%

Double Exposures: Future Water Security across Urban Southeast Asia

Lorenzo

Kinzig

2019

Water

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Southeast Asia is one of the most dynamic regions in the world in terms of economic growth and urbanization. At the same time, the region is also prone to multiple hydro-meteorological disasters, which are projected to be intensified by climate change. This paper analyzes the combined effect of economic development and climate change on the future water security of middle-income Southeast Asian countries using the double exposure framework, focusing on the effects in urban areas. A review of the existing literature reveals unequal water security outcomes across the region as a result of combined climate, economic, and urbanization pressures. The water supply and sanitation infrastructure of upper-middle-income Southeast Asian countries are vulnerable to damage from intensified disasters, potentially decreasing both immediate and longer-term water quality. In lower-middle-income countries, the water quality will be the more important water security challenge in the short-term as opposed to water quantity, mainly due to the fast growth of industries. Lower-middle-income countries, though less vulnerable to disasters, will still have lower future water security compared to upper-middle-income countries, as they have less capacity to address water quality and quantity challenges brought about by both industrial growth and urbanization. Across the region, future water quantity and quality challenges may result in slower economic and urban growth if not planned adequately.

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Exploration of the effects of storm surge on the extent of saltwater intrusion into the surficial aquifer in coastal east-central Florida (USA)

Cited by 39 publications

References 34 publications

A risk-based groundwater modeling framework in coastal aquifers: a case study on Long Island, New York, USA

A risk-based groundwater modeling framework in coastal aquifers: a case study on Long Island, New York, USA

Hydrochemical Characteristics and Irrigation Suitability Evaluation of Groundwater with Different Degrees of Seawater Intrusion

Double Exposures: Future Water Security across Urban Southeast Asia

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