Mapping vulnerability water supply in Rach Gia city due to saline intrusion on using analytical hierarchy process

Phin, Trinh Thi; Hoa, Dinh Thi Bao; Trong, Tran Dinh; Hai, Dinh Tuan; Que, Phan Thi Nguyet

doi:10.1007/s40899-022-00712-2

Cited by 2 publications

(2 citation statements)

References 17 publications

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“…Based on a broader set of criteria, this technique is used to guide stakeholders involved in groundwater development and sustainable resource management [36,37]. The applications of AHP in the field of groundwater include assessing groundwater vulnerability by developing indices based on hydrogeological parameters and mapping groundwater potential zones [38][39][40][41][42][43][44][45][46][47][48]. In the field of saltwater intrusion, a GIS-based AHP weighted index overlay analysis technique has been demonstrated to determine the distribution of groundwater vulnerability [49,50].…”

Section: Analytical Hierarchy Process (Ahp)mentioning

confidence: 99%

Developing Functional Recharge Systems to Control Saltwater Intrusion via Integrating Physical, Numerical, and Decision-Making Models for Coastal Aquifer Sustainability

Miky,

Issa,

Mahmod

2023

JMSE

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Controlling the hydraulic heads along a coastal aquifer may help to effectively manage saltwater intrusion, improve the conventional barrier’s countermeasure, and ensure the coastal aquifer’s long-term viability. This study proposed a framework that utilizes a decision-making model (DMM) by incorporating the results of two other models (physical and numerical) to determine proper countermeasure components. The physical model is developed to analyze the behavior of saltwater intrusion in unconfined coastal aquifers by conducting two experiments: one for the base case, and one for the traditional vertical barrier. MODFLOW is used to create a numerical model for the same aquifer, and experimental data are used to calibrate and validate it. Three countermeasure combinations, including vertical barrier, surface, and subsurface recharges, are numerically investigated using three model case categories. Category (a) model cases investigate the hydraulic head’s variation along the aquifer to determine the best recharge location. Under categories (b) and (c), the effects of surface and subsurface recharges are studied separately or in conjunction with a vertical barrier. As a pre-set of the DMM, evaluation and classification ratios are created from the physical and numerical models, respectively. The evaluation ratios are used to characterize the model case results, while the classification ratios are used to classify each model case as best or worst. An analytical hierarchy process (AHP) as a DMM is built using the hydraulic head, salt line, repulsion, wedge area, and recharge as selection criteria to select the overall best model case. According to the results, the optimum recharging location is in the length ratio (LR) from 0.45 to 0.55. Furthermore, the DMM supports case3b (vertical barrier + surface recharge) as the best model case to use, with a support percentage of 48%, implying that this case has a good numerical model classification with a maximum repulsion ratio (Rr) of 29.4%, and an acceptable wedge area ratio (WAR) of 1.25. The proposed framework could be used in various case studies under different conditions to assist decision-makers in evaluating and controlling saltwater intrusion in coastal aquifers.

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Section: Analytical Hierarchy Process (Ahp)mentioning

confidence: 99%

Developing Functional Recharge Systems to Control Saltwater Intrusion via Integrating Physical, Numerical, and Decision-Making Models for Coastal Aquifer Sustainability

Miky,

Issa,

Mahmod

2023

JMSE

View full text Add to dashboard Cite

show abstract

“…Based on a broader set of criteria, this technique is used to guide stakeholders involved in groundwater development and sustainable resource management (Vaidya and Kumar 2006;Alwetaishi et al 2017). The applications of AHP in the field of groundwater include assessing groundwater vulnerability by developing indices based on hydrogeological parameters and mapping groundwater potential zones (Arunbose et al 2021;Osiakwan et al 2022;Ahmadi et al 2021;Castillo et al 2022;Achu et al 2020;Sajil Kumar et al 2022;Nithya et al 2019;Phin et al, 2022;Zghibi et al, 2020;Mallick et al, 2019;Shao et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

Developing Functional Recharge Systems to Repel Saltwater Intrusion via Integrating Physical, Numerical, and Decision-Making Models for Coastal Aquifer Sustainability

Miky

Issa

Mahmod

2023

Preprint

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Abstract. Controlling the hydraulic heads along the coastal aquifer may help to effectively manage saltwater intrusion, improve the conventional barrier's countermeasure, and ensure the coastal aquifer's long-term viability. This study proposed a framework that utilizes a decision-making model (DMM) by incorporating the results of two other models (physical and numerical) to determine proper countermeasure components. The physical model is developed to analyze the behavior of saltwater intrusion in unconfined coastal aquifers by conducting two experiments: one for the base case and one for the traditional vertical barrier. MODFLOW is used to create a numerical model for the same aquifer, and experimental data is used to calibrate and validate it. Three countermeasure combinations, including vertical barrier, surface, and subsurface recharges, are numerically investigated using three model case categories. Category (a) model cases investigate the hydraulic head’s variation along the aquifer to determine the best recharge location. Under categories (b) and (c), the effects of surface and subsurface recharges are studied separately or in conjunction with a vertical barrier. As a pre-set of the DMM, evaluation and classification ratios are created from the physical and numerical models, respectively. The evaluation ratios are used to characterize the model cases results, while the classification ratios are used to classify each model case as best or worst. An analytic hierarchy process (AHP) as DMM is built using the classification ratios of hydraulic head (HHR), salt line (SLR), intrusion (IR), repulsion (Rr), wedge area (WAR), and recharge (RER) as selection criteria to select the overall best model case. The optimal recharging location, according to the results, is in the length ratio (LR) range from 0.45 to 0.55. Furthermore, the DMM supports case3b (vertical barrier + surface recharge) as the best model case to use, with a support percentage of 47.93 %, implying that this case has a good numerical model classification with a minimum IR of 67.9 %, a maximum Rr of 29.4 %, and an acceptable WAR of 1.25. The proposed framework could be used in various case studies under different conditions to assist decision-makers in evaluating and controlling saltwater intrusion in coastal aquifers.

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Mapping vulnerability water supply in Rach Gia city due to saline intrusion on using analytical hierarchy process

Cited by 2 publications

References 17 publications

Developing Functional Recharge Systems to Control Saltwater Intrusion via Integrating Physical, Numerical, and Decision-Making Models for Coastal Aquifer Sustainability

Developing Functional Recharge Systems to Control Saltwater Intrusion via Integrating Physical, Numerical, and Decision-Making Models for Coastal Aquifer Sustainability

Developing Functional Recharge Systems to Repel Saltwater Intrusion via Integrating Physical, Numerical, and Decision-Making Models for Coastal Aquifer Sustainability

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