Comparison of the AVI, modified SINTACS and GALDIT vulnerability methods under future climate-change scenarios for a shallow low-lying coastal aquifer in southern Finland

Luoma, Samrit; Okkonen, Jarkko; Korkka-Niemi, Kirsti

doi:10.1007/s10040-016-1471-2

Cited by 72 publications

(23 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The parameters used are the groundwater occurrence (G), aquifer hydraulic conductivity (A), height of the groundwater level above sea level (L), distance inland perpendicular from the shoreline (D), impact of existing seawater intrusion in the area (I), and thickness of the aquifer considered (T). Many studies have employed the GALDIT method to assess the overall vulnerability of coastal aquifers to SWI in coastal regions and islands of different countries in Europe, Asia, and Africa over very small (2 km 2 ) and large (2835 km 2 ) areas [4,[22][23][24][25][26][27].Lobo-Ferreira and Chachadi [21,22] used GALDIT to conduct vulnerability tests on an unconfined aquifer covering an area of approximately 10 km 2 at Monte Gordo, Portugal. They mapped the spatial distributions of the six GALDIT parameters and prepared SWI scenarios describing sea level rises of 0.25 and 0.5 m and applied them to the parameter G to calculate the vulnerability depending on individual scenarios.…”

mentioning

confidence: 99%

Application of GALDIT in Assessing the Seawater Intrusion Vulnerability of Jeju Island, South Korea

Chang

Chung

Kim

et al. 2019

Water

View full text Add to dashboard Cite

Seawater intrusion (SWI) is a major environmental threat to groundwater resources in coastal regions. GALDIT is an index-based SWI vulnerability model that is increasingly being used in many parts of the world to identify regions that are vulnerable to various types of SWI based on six major parameters. In this study, we conducted a vulnerability assessment of Jeju Island to SWI based on several years of collected groundwater level data and hydrogeological values where the objectives of the study were to visualize the distribution of recent SWI, to increase the reliability of the GALDIT assessment method by improving current GALDIT techniques, and to respond effectively to diagnoses of SWI on Jeju. To improve the GALDIT assessment method to fit the Jeju model, the possibility of electrical conductivity was explored instead of standard GALDIT parameters that represented the existing impact of SWI. Improvements to the GALDIT vulnerability assessment method made it clear that groundwater became increasingly vulnerable to SWI in the existing high-vulnerability group. The results of this research may be used to develop a quantitative index for rational decision-making on policies and suggest the need for further improvements in groundwater management, with a stronger focus on easing groundwater use.2 of 17 index method. Numerical simulations reproduce the dynamics of groundwater flow and salt transport in the coastal aquifer and can incorporate site characteristics [2,[7][8][9][10][11][12]. However, despite their accuracy and usefulness, numerical simulations require a considerable amount of hydrogeologic data as input and a difficult calibration process, therefore substantial computing power is needed for data processing and modeling.An alternative vulnerability assessment method uses a steady-state analytical solution based on the sharp interface model with the Ghyben-Herzberg principle, where the mixing of freshwater and saltwater is neglected and instead a sharp interface is assumed [13]. The sharp interface model is often employed to assess the vulnerability of aquifers to the effects of SWI because of the relatively easy and rapid computations. For example, Werner et al. [14] proposed a SWI vulnerability index based on the sharp interface approach to predict the impacts of future climate change and groundwater depletion by anthropogenic activities. Morgan and Werner [15] combined the analytical approach with qualitative investigation to assess the vulnerability of confined aquifers in Australia.Recently, assessments using overlay and index techniques based on spatial mapping have been developed and improved to intuitively show the intrinsic vulnerability of aquifers. Some of the common methods used for classification and mapping of groundwater vulnerability zones include DRASTIC [16], GALDIT [17], SINTACS [18], and Aquifer Vulnerability Index (AVI) [19]. With the exception of GALDIT, the methods were developed from the concept that pollutants originate from the land surface and are transported through the vadose...

show abstract

mentioning

confidence: 99%

Application of GALDIT in Assessing the Seawater Intrusion Vulnerability of Jeju Island, South Korea

Chang

Chung

Kim

et al. 2019

Water

View full text Add to dashboard Cite

show abstract

“…Many researchers have analyzed sensitivity using the map removal method to determine the importance of layers in the SINTACS model, then remove the least important layer, and add other layers such as land use or fault [16,27,[35][36][37].…”

Section: Sensitivity Analysis Of Sintacs Modelmentioning

confidence: 99%

“…It is believed that in this case, the effect of errors and uncertainties of a parameter is limited in the final output. Many previous researchers used this index to estimate vulnerability [16][17][18][19]. In the next step, arsenic and nitrate concentrations in groundwater were combined with the layers of groundwater recharge potential model, and an occurrence probability map was prepared.…”

mentioning

confidence: 99%

Assessing Pollution Risk in Ardabil Aquifer Groundwater of Iran with Arsenic and Nitrate Using the SINTACS Model

Dizaji¹,

Hosseini²,

Rezaverdinejad³

et al. 2020

Pol. J. Environ. Stud.

View full text Add to dashboard Cite

“…The vulnerability of coastal aquifers is an intrinsic feature of them that relates to the geological structure, topography, and dynamics of groundwater flow [6]; and as fresh and salt water are miscible, there is a transition zone where these waters are gradually mixed by diffusion processes. The degree of groundwater vulnerability is affected by seasonal variations in groundwater recharge during the year [7].…”

Section: Introductionmentioning

confidence: 99%

Geoelectrical and Geochemical Characterization of Groundwater in a Shallow Coastal Aquifer

Guevara-Torres

Peinado-Guevara²,

Delgado‐Rodríguez

et al. 2017

Pol. J. Environ. Stud.

View full text Add to dashboard Cite

Playa Las Glorias is the main tourist destination for the inhabitants of the municipality of Guasave, Sinaloa, México, and it overlies a shallow coastal aquifer. In recent years, the momentum of the tourism industry in the region has brought a growing demand in the consumption of drinking water. Because of this, it is relevant to the precise knowledge of the interface of slightly brackish saltwater for an efficient planning of new wells by the municipal authorities. For efficient groundwater exploitation, it was taken into consideration the productivity of the aquifer and the environmental impact that would cause improper management of water resources. The electromagnetic profiling (EMP) method was applied in Playa Las Glorias, Sinaloa, Mexico. A total of 150 measurements of EMP distributed in 11 profiles were performed, of which 10 were perpendicular to the coast and one parallel to it, using an EM34 meter in horizontal polarization and separation between coils of 10 m and 20 m. The apparent conductivity maps show an anomaly of low conductivity, indicating the presence of fresh or slightly saline water. In this anomalous zone we performed an electric resistivity tomography (ERT) profile to determine the behavior of groundwater salinity finding a shallow layer of freshwater, and as it deepens the salinity increases due to the influence of the sea. In addition, electrical resistivity (R w ) values were measured in groundwater samples that, along with the resistivity values (R o ) for sandy formation obtained from ERT data, allowed us to determine a lineal relationship between both resistivities. A hydro geochemical study was conducted in the site through Piper diagrams and Chadha, indicating a predominance in the region of chlorinated water due to the influence

show abstract

Comparison of the AVI, modified SINTACS and GALDIT vulnerability methods under future climate-change scenarios for a shallow low-lying coastal aquifer in southern Finland

Cited by 72 publications

References 29 publications

Application of GALDIT in Assessing the Seawater Intrusion Vulnerability of Jeju Island, South Korea

Application of GALDIT in Assessing the Seawater Intrusion Vulnerability of Jeju Island, South Korea

Assessing Pollution Risk in Ardabil Aquifer Groundwater of Iran with Arsenic and Nitrate Using the SINTACS Model

Geoelectrical and Geochemical Characterization of Groundwater in a Shallow Coastal Aquifer

Contact Info

Product

Resources

About