Groundwater flow modeling of Quaternary aquifer Ras Sudr, Egypt

El-Bihery, Medhat

doi:10.1007/s00254-008-1589-1

Cited by 21 publications

(7 citation statements)

References 4 publications

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“…Numerous studies concerning numerical modelling of coastal karst aquifers have been conducted on local scales (Lambrakis and Kallergis 2001;Qahman and Larabi 2006;Pisinaras et al 2007;Giambastiani et al 2007;Rejani et al 2008;Shammas and Thunvik 2009;Candela et al 2009;El-Bihery 2009;Cobaner et al 2012;El Ayni et al 2013). Large-scale analyses have often been based on simplified GIS approaches, whereas reliable numerical modelling is relatively rare, especially for management purposes (Sutanudjaja et al 2001;Langevin 2003;Masciopinto 2006;Ranjan et al 2006).…”

Section: Introductionmentioning

confidence: 99%

Modelling and management of a Mediterranean karstic coastal aquifer under the effects of seawater intrusion and climate change

2015

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The study and management of the groundwater resources of a large, deep, coastal, karstic aquifer represent a very complex hydrogeological problem. Here, this problem is successfully approached by using an equivalent porous continuous medium (EPCM) to represent a karstic Apulian aquifer (southern Italy). This aquifer, which is located on a peninsula and extends to hundreds of metres depth, is the sole local source of high-quality water resources. These resources are at risk due to overexploitation, climate change and seawater intrusion. The model was based on MODFLOW and SEAWAT codes. Piezometric and salinity variations from 1930 to 2060 were simulated under three past scenarios (up to 1999) and three future scenarios that consider climate change, different types of discharge, and changes in sea level and salinity. The model was validated using surveyed piezometric and salinity data. An evident piezometric drop was confirmed for the past period (until 1999); a similar dramatic drop appears to be likely in the future. The lateral intrusion and upconing effects of seawater intrusion were non-negligible in the past and will be considerable in the future. All phenomena considered here, including sea level and sea salinity, showed non-negligible effects on coastal groundwater.

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Section: Introductionmentioning

confidence: 99%

Modelling and management of a Mediterranean karstic coastal aquifer under the effects of seawater intrusion and climate change

2015

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“…In other words, from the hydrogeological point of view, the general aim is to develop a large-scale model which estimates the water balance at the scale of a hydrogeological basin. Therefore, such a model is different not only from the mathematical models which are used to study coastal aquifers at the local scale, mainly to determine the impact of pumping on salt water intrusion (Vandenbohede et al, 2009;Yuan and Lin, 2009; among the others), but also from modeling studies that are found in the literature and deal with catchments whose size is up to 200 km 2 (El-Bihery, 2009;Lin et al, 2009;Simpson et al, 2010, among the others).…”

Section: Introductionmentioning

confidence: 99%

Numerical modeling of the groundwater flow in the fractured and karst aquifer of the Salento peninsula (Southern Italy)

et al. 2013

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Water resources represented by coastal aquifers are very important for regions characterized by a relevant request of freshwater, but limited rainfall, lack of surface water bodies and intrusion of the seawater through the sediments which host groundwater. Therefore some coastal areas, like the Salento peninsula (southern Italy), are subjected to the risk of desertification and a proper management of groundwater resources requires tools to analyze and predict the water balance and the evolution of the physical system in response to human activities (e.g., ground water withdrawals) and climatic factors. The Salento peninsula is a typical Mediterranean basin, where the main water resource is the aquifer hosted in Cretaceous carbonatic rocks (Calcare di Altamura, Altamura limestone): this is a fractured and karst aquifer, with a poor recharge and complex relationships with the sea. In order to develop a tool to assess the water balance at regional scale for the considered aquifer system, a groundwater flow model was developed by Giudici et al. (2012a); it is based on a conceptual model obtained from a reconstruction of the hydrostratigraphic architecture of the region, which includes the main aquifer and the overlaying rocks characterized by low permeability which can host local and relatively thin aquifers. In this paper that work is updated, by improving the reconstruction of the hydraulic head and of the conceptual model, above all in those areas that the previous model evidenced as critical for the absence of fresh water along the whole aquifer thickness. Moreover, since the estimate of some model’s input parameters is affected by high uncertainty, a sensitivity analysis is performed to evaluate the effects of this uncertainty on the model’s results.

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“…Processing MODFLOW was used for model pre‐ and post‐processing (Chiang & Kinzelbach, 2001). MODFLOW combines Darcy's law for water flow in saturated porous media with the mass balance equation (Bouhlila, 1999; Chen, Zhang, Zhou, & Zhang, 2013; El‐Bihery, 2009; Ghouili et al, 2018).…”

Section: Approach and Methodology Of Groundwater Flow Modeling And Somentioning

confidence: 99%

Hydrogeochemical modeling for groundwater management in arid and semiarid regions using MODFLOW and MT3DMS: A case study of the Jeffara of Medenine coastal aquifer, South‐Eastern Tunisia

Hamzaoui‐Azaza

Zammouri

Ameur

et al. 2020

Natural Resource Modeling

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The study of water quality and the quantification of reserves and their variations according to natural and anthropogenic forcing is necessary to establish an adequate management plan for groundwater resources. For this purpose, a modeling approach is a useful tool that allows, after calibration phase and verification of simulation, and under different scenarios of forcing and operational changes, to estimate and control the groundwater quantity and quality. The main objective of this study is to collect all available data in a model that simulates the Jeffara of Medenine coastal aquifer system functioning. To achieve this goal, a conceptual model was constructed based on previous studies and hydrogeological investigations. The regional groundwater numerical flow model for the Jeffara aquifer was developed using MODFLOW working under steady‐state and transient conditions. Groundwater elevations measured from the piezometric wells distributed throughout the study area in 1973 were selected as the target water levels for steady state (head) model calibration. A transient simulation was undertaken for the 42 years from 1973 to 2015. The historical transient model calibration was satisfactory, consistent with the continuous piezometric decline in response to the increase in groundwater abstraction. The developed numerical model was used to study the system's behavior over the next 35 years under various constraints. Two scenarios for potential groundwater extraction for the period 2015–2050 are presented. The predictive simulations show the effect of the increase of the exploitation on the piezometric levels. To study the phenomenon of salinization, which is one of the most severe and widespread groundwater contamination problems, especially in coastal regions, a solute transport model has been constructed by using MT3DMS software coupled with the groundwater flow model. The best calibration results are obtained when the connection with the overlying superficial aquifer is considered suggesting that groundwater contamination originates from this aquifer. Recommendations for water resource managers The results of this study show that Groundwater resources of Jeffara of Medenine coastal aquifer in Tunisia are under immense pressure from multiple stresses. The water resources manager must consider the impact of economic and demographic development in groundwater management to avoid the intrusion of saline water. The results obtained presented some reference information that can serve as a basis for water resources planning. The model runs to provide information that managers can use to regulate and adequately control the Jeffara of Medenine water resources.

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Groundwater flow modeling of Quaternary aquifer Ras Sudr, Egypt

Cited by 21 publications

References 4 publications

Modelling and management of a Mediterranean karstic coastal aquifer under the effects of seawater intrusion and climate change

Modelling and management of a Mediterranean karstic coastal aquifer under the effects of seawater intrusion and climate change

Numerical modeling of the groundwater flow in the fractured and karst aquifer of the Salento peninsula (Southern Italy)

Hydrogeochemical modeling for groundwater management in arid and semiarid regions using MODFLOW and MT3DMS: A case study of the Jeffara of Medenine coastal aquifer, South‐Eastern Tunisia

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