Assessment of groundwater vulnerability and quality in coastal aquifers: a case study (Tipaza, North Algeria)

Bouderbala, Abdelkader; Rémini, Boualem; Hamoudi, Abdelamir Saaed; Pulido−Bosch, A.

doi:10.1007/s12517-015-2151-6

Cited by 53 publications

(19 citation statements)

References 28 publications

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“…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.…”

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“…In a recent study, Kura et al [4] performed a GALDIT assessment on Kapas Island, a tropical island in northeastern Malaysia and concluded that the alluvial deposits west of the island were highly vulnerable to SWI. Recinos et al [26] carried out a GALDIT assessment on a Mediterranean alluvial aquifer, which is a representative pilot site for various case studies on SWI and reported that the intrinsic vulnerability shifted from moderate to high vulnerability in 15% of the regions between 1992 and 2004.Some studies have compared the GALDIT method to other index-based methods like DRASTIC, SINTACS, and AVI to evaluate the model performance [3,23,24,28]. Pedreira et al [25] applied two overlay and index techniques to one field; they assessed nitrate pollution using the DRASTIC model, while the SWI vulnerability was tested with the GALDIT method.…”

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confidence: 99%

“…Some studies have compared the GALDIT method to other index-based methods like DRASTIC, SINTACS, and AVI to evaluate the model performance [3,23,24,28]. Pedreira et al [25] applied two overlay and index techniques to one field; they assessed nitrate pollution using the DRASTIC model, while the SWI vulnerability was tested with the GALDIT method.…”

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

Chang

Chung

Kim

et al. 2019

Water

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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...

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

Chang

Chung

Kim

et al. 2019

Water

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“…Also, WQI is regarded as one of the most efficient technique to evaluate groundwater quality [1,13]. Among the main advantages of WQI is the ability to integrate data from multiple water quality parameters into a mathematical equation which determines the water quality level [14]. Therefore, the objective of this work is to assess the groundwater quality and to define its suitability for drinking based on hydrochemical analysis and WQI in the Quaternary Alluvial Basin.Thus, this serve as a background work to improve the evaluation of groundwater quality in the planning of water resources in the future.…”

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confidence: 99%

Evaluating the suitability of groundwater for drinking purposes in the North Chengdu Plain, China

et al. 2019

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Groundwater is a significant and crucial component for all development activities of any life support system. In this study, the hydrochemical analysis and water quality index method (WQI) were used to assess groundwater quality for drinking purposes. Twelve groundwater samples were collected and analyzed into fourteen parameters which were considered as important indicators for assessing groundwater quality. A comparative study of these parameters with that of the Chinese Groundwater Standard (GB/T14848-2017) was conducted. It can be depicted from the results that groundwater quality is categorized as very hard, fresh water and slightly alkaline in nature. The major sequence of dominant cations and anions in groundwater are Ca2+ > Mg2+ > Na+ > K+ and HCO-3 > SO2-4 > Cl- respectively. From the total 12 samples analyzed, the parameters of TH, NH+4, Fe and Mn of samples exceeded the limits set by (GB/T14848-2017) standard. Piper diagram illustrated that groundwater samples of the studied area are mostly of Ca-Mg-HCO3-SO4 type. WQI showed all samples fall between excellent to good category of water and suitable for drinking purposes. The quality of groundwater is mainly affected from anthropogenic activities and natural influence. The proposed method is reliable and effcient for groundwater pollution assessment and can be used in decision-making.

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“…The acronym GALDIT derived from the acronyms of the following six parameters: Groundwater occurrence (G), aquifer hydraulic conductivity (A), height of groundwater level above sea level (H), distance from the shore (distance inland perpendicular from shoreline) (D), impact of existing status of seawater intrusion in the area (I), and thickness of the aquifer (T) [5,6]. It has been applied in many Mediterranean countries, such as Portugal and Algeria [6,15,16]. It has been also used for the assessment of coastal aquifer vulnerability in Northern Greece, including a coastal plain part of Rhodope [16], a coastal aquifer system at River Nestos Eastern Delta [17] and a coastal area of the River Anthemountas basin [18].…”

Section: Introductionmentioning

confidence: 99%

Assessment of Groundwater Vulnerability in the North Aquifer Area of Rhodes Island Using the GALDIT Method and GIS

2019

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Salinization of coastal aquifer systems constitutes a major threat for groundwater. Especially areas with high population density due to increasing tourist activity may face severe problems. In this study, the GALDIT method was applied in the north side of Rhodes Island, Greece, in order to assess groundwater vulnerability to seawater intrusion. Hydrogeological data were elaborated in geographical information systems (GIS), and appropriate thematic maps were produced. The final vulnerability map was obtained from the combination of the thematic maps using overlying techniques. Based on the application of the GALDIT method, a zone up to 1000 m from the shore is characterized by medium to high vulnerability, while medium vulnerability characterizes the eastern part of the study area. Overexploitation of the aquifer, due to the intense touristic activity in Ialysos area, constitutes the main reason for groundwater salinization due to seawater intrusion in the study area. Consequently, planning of proper groundwater management and systematic monitoring of the groundwater reserves are of the utmost importance in order to solve existing problems and prevent future issues of salinization.

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Assessment of groundwater vulnerability and quality in coastal aquifers: a case study (Tipaza, North Algeria)

Cited by 53 publications

References 28 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

Evaluating the suitability of groundwater for drinking purposes in the North Chengdu Plain, China

Assessment of Groundwater Vulnerability in the North Aquifer Area of Rhodes Island Using the GALDIT Method and GIS

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