Water vulnerability of coastal aquifers using AHP and parametric models: methodological overview and a case study assessment

Nasri, Ghada; Hajji, Soumaya; Aydi, Wanissa; Boughariou, Emna; Allouche, Nabila; Bouri, Salem

doi:10.1007/s12517-020-06390-8

Cited by 30 publications

(9 citation statements)

References 53 publications

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“…Recently, some models have been used in order to assess the groundwater vulnerability to pollution, such as the DRASTIC model (Chukwuma et al, 2023; Haied et al, 2021; Liang et al, 2016). Previous works, which are related to the Mahdia‐Ksour Essef aquifer study, used the DRASTIC model (Nasri et al, 2021; Saidi, 2011) in order to investigate the groundwater vulnerability. These studies confirmed the contribution of the agricultural activities and salt water intrusion to the groundwater pollution.…”

Section: Introductionmentioning

confidence: 99%

Application of geochemical tracers for the investigations of groundwater resources in semi‐arid region (Central‐East Tunisia)

Gammoudi,

Trabelsi,

Zouari

2024

Hydrological Processes

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Groundwater resources in Mahdia‐Ksour Essef region, located in the central‐eastern part of Tunisia, suffer from intensive exploitation and degradation of water quality. The assessment of groundwater vulnerability, the well‐understanding of geochemical processes and the investigation of groundwater quality variations are of particular importance for water resources management in this semi‐arid region. The results of this multi‐disciplinary investigation show that groundwaters of Mahdia‐Ksour Essef region are flowing from El Jem and Boumerdes regions in the South, towards the Mediterranean Sea and the sebkha of Moknine in the North. The groundwaters are classified as either Na‐Cl or Ca‐SO4. Stable oxygen and hydrogen isotope compositions (δ18O and δ2H) confirm a recharge by rapid water infiltration, evaporate surface water and water‐rock interaction processes in the salinity increase. The rock‐water interaction processes of the mineralization of groundwaters include the cation‐exchange reactions and the dissolution of carbonates and evaporate. The high values of the water quality index (WQI) and of the total dissolved solids (TDS) (3.7–11 g/L) of these groundwaters indicate their unsuitability for drinking purpose. Moreover, the combination of the WQI, TDS and nitrate results prove the vulnerability of the studied groundwater to the anthropogenic pollution linked to agriculture and domestic activities and to the salt water contamination.

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Section: Introductionmentioning

confidence: 99%

Application of geochemical tracers for the investigations of groundwater resources in semi‐arid region (Central‐East Tunisia)

Gammoudi,

Trabelsi,

Zouari

2024

Hydrological Processes

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“…It calculates each index and arranges the indices through a decision-making method, and then estimates the probability of SWI potential for various hydrogeological settings by numerical modeling [30]. These parameters are based on the physical properties that can directly influence SWI [31,43]. Once the distribution of vulnerability to SWI is computed using the GALDIT index score, the next step is to determine the spatial extent of GW vulnerability to SWI in the areas of concern.…”

Section: Introductionmentioning

confidence: 99%

“…The technique involves locating and selecting suitable sites for recharge, as well as constructing a hydraulic barrier to prevent seawater flow towards freshwater aquifers. Identifying appropriate zones for GW artificial recharge is typically done by combining different thematic maps with assigned ranking values, such as geology, geomorphology, hydrological soil, runoff, surface slope, and land use [43,48].…”

Section: Introductionmentioning

confidence: 99%

Vulnerability of a Tunisian Coastal Aquifer to Seawater Intrusion: Insights from the GALDIT Model

Zghibi

Merzougui

Mansaray

et al. 2022

Water

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The Korba region in northwestern Tunisia has a coastal aquifer that is impacted by intensive irrigation, urban expansion, and sensitivity to SWI. We assessed the vulnerability extent of Korba’s GW to SWI. We utilized a parametric model for GW vulnerability assessment, the GALDIT, which considers six parameters to determine SWI effects. The GALDIT map has four rating categories (≥7.5, 7.5–5, 5–2.5, and <2.5), representing very high, high, moderate, and low vulnerability, respectively. Most of the region was found to be highly vulnerable (44.2% of the surface area), followed by areas characterized by very high (20.3%) and moderate (19.3%) vulnerability. Only 16.2% was found to have low vulnerability. A parameter sensitivity analysis showed that distance from shore and depth of GW represent the determining factors for SWI with variation index values of 24.12 and 18.02%, respectively. Inland advancement of seawater is causing GW salinity to rise, as indicated by a strong Pearson correlation coefficient of 0.75 between SWI indices and the electrical conductivity. Suitable areas for artificial recharge were mainly distributed in the alluvial plains, with a total area of 32.85 km2. Inhibiting SWI requires about 11.31 MCM of artificial recharge in the two most suitable recharge zones in the region.

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“…Scholars have combined different evaluation objects and theoretical connotations to construct corresponding indicators, and they used a variety of methods to evaluate water resources vulnerability. In the application of evaluation methods, weight evaluation methods, such as entropy weight method [28], projection pursuit method [29], analytic hierarchy process (AHP) method [30] are used more frequently. In addition, principal component analysis (PCA) [31,32], technique for order preference by similarity to an ideal solution (TOPSIS) [33], rough set cloud [34], connection entropy approach [35], expert-based model [36] and other quantitative methods are also used in the assessment of water resources vulnerability.…”

Section: Introductionmentioning

confidence: 99%

Assessment and Prediction of Water Resources Vulnerability Based on a NRS-RF Model: A Case Study of the Song-Liao River Basin, China

Chen

Feng

2021

Entropy

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The vulnerability of water resources is an important criterion for evaluating the carrying capacity of water resources systems under the influence of climate change and human activities. Moreover, assessment and prediction of river basins’ water resources vulnerability are important means to assess the water resources security state of river basins and identify possible problems in future water resources systems. Based on the constructed indicator system of water resources vulnerability assessment in Song-Liao River Basin, this paper uses the neighborhood rough set (abbreviated as NRS) method to reduce the dimensionality of the original indicator system to remove redundant attributes. Then, assessment indicators’ standard values after dimensionality reduction are taken as the evaluation sample, and the random forest regression (abbreviated as RF) model is used to assess the water resources vulnerability of the river basin. Finally, based on data under three different future climate and socio-economic scenarios, scenario predictions are made on the vulnerability of future water resources. The results show that the overall water resources vulnerability of the Song-Liao River Basin has not improved significantly in the past 18 years, and the overall vulnerability of the Song-Liao River Basin is in the level V of moderate to high vulnerability. In the future scenario 1, the overall water resources vulnerability of the river basin will improve, and it is expected to achieve an improvement to the level III of moderate to low vulnerability. At the same time, the natural vulnerability and vulnerability of carrying capacity will increase significantly in the future, and the man-made vulnerability will increase slowly, which will deteriorate to the level V of moderate to high vulnerability under Scenario 3. Therefore, taking active measures can significantly reduce the vulnerability of nature and carrying capacity, but man-made vulnerability will become a bottleneck restricting the fragility of the overall water resources of the river basin in the future.

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Water vulnerability of coastal aquifers using AHP and parametric models: methodological overview and a case study assessment

Cited by 30 publications

References 53 publications

Application of geochemical tracers for the investigations of groundwater resources in semi‐arid region (Central‐East Tunisia)

Application of geochemical tracers for the investigations of groundwater resources in semi‐arid region (Central‐East Tunisia)

Vulnerability of a Tunisian Coastal Aquifer to Seawater Intrusion: Insights from the GALDIT Model

Assessment and Prediction of Water Resources Vulnerability Based on a NRS-RF Model: A Case Study of the Song-Liao River Basin, China

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