A very large scale GIS-based groundwater flow model for the Nubian sandstone aquifer in Eastern Sahara (Egypt, northern Sudan and eastern Libya)

Goßel, Wolfgang; Ebraheem, A. M.; Wycisk, Peter

doi:10.1007/s10040-004-0379-4

Cited by 98 publications

(54 citation statements)

References 8 publications

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“…The groundwater flows locally from southwest to northeast. The aquifer system has been in a transient-state condition since the current arid period began about 5000 years ago (Heinl and Thorweihe 1993, Churcher et al 1999, Ebraheem et al 2002, Gossel et al 2004. Due to the prevalence of hyper-arid conditions, present day aquifer recharge is excluded; but the discharge rate has increased incrementally due to the more than 700 productive wells.…”

Section: Development Of the Conceptual Modelmentioning

confidence: 99%

Numerical groundwater modelling as an effective tool for management of water resources in arid areas

Alfy

2014

Hydrological Sciences Journal

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Editor D. Koutsoyiannis; Associate editor X. Chen Citation El Alfy, M., 2014. Numerical groundwater modelling as an effective tool for management of water resources in arid areas. Hydrolological Sciences Journal, 59 (6), 1259-1274. http://dx.doi.org/10.1080/02626667.2013.836278 Abstract Groundwater, possibly of fossil origin, is used for water supply in some arid regions where the replenishment of groundwater by precipitation is low. Numerical modelling is a helpful tool in the assessment of groundwater resources and analysis of future exploitation scenarios. To quantify the groundwater resources of the East Owienat area in the southwest of the Western Desert, Egypt, the present study assesses the groundwater resources management of the Nubian aquifer. Groundwater withdrawals have increased in this area, resulting in a disturbance of the aquifer's natural equilibrium, and the large-scale and ongoing depletion of this critical water reserve. Negative impacts, such as a decline in water levels and increase in salinity, have been experienced. The methodology includes application of numerical groundwater modelling in steady and transient states under different measured and abstraction scenarios. The numerical simulation model developed was applied to assess the responses of the Nubian aquifer water level under different pumping scenarios during the next 30 years. Groundwater management scenarios are evaluated to find an optimal management solution to satisfy future needs. Based on analysis of three different development schemes that were formulated to predict the future response of the aquifer under long-term water stress, a gradual increase in groundwater pumping to 150% of present levels should be adopted for protection and better management of the aquifer. Similar techniques could be used to improve groundwater management in other parts of the country, as well as other similar arid regions.Key words groundwater management; numerical modelling; Nubian aquifer; East Owienat; Egypt La modélisation numérique des écoulements souterrains: un outil efficace pour la gestion des ressources en eau dans les zones arides Résumé Les eaux souterraines, quelquefois très anciennes, sont parfois utilisées pour l'alimentation en eau dans les régions arides, où la recharge des eaux souterraines par les précipitations est faible. La modélisation numérique est un outil précieux pour l'évaluation des ressources en eaux souterraines et l'analyse des scénarios d'exploitation futurs. Pour quantifier les ressources en eaux souterraines de la région de l'Est Owienat dans le Sud-Ouest du désert occidental égyptien, la présente étude évalue la gestion des ressources en eaux souterraines de l'aquifère nubien. Les pompages d'eau souterraine ont augmenté dans cette région, entraînant une perturbation de l'équilibre naturel de l'aquifère et la dégradation continue et à grande échelle de cette réserve en eau cruciale. Des impacts négatifs, comme la baisse du niveau piézométrique et l'augmentation de la salinité, sont connus. La méthodologie co...

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Section: Development Of the Conceptual Modelmentioning

confidence: 99%

Numerical groundwater modelling as an effective tool for management of water resources in arid areas

Alfy

2014

Hydrological Sciences Journal

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“…The principles of preparing and compiling data for numerical models of large hydrogeological units are described in many studies (e.g. Anderson & Woessner 1992, Gurwin 2003, 2012, Gossel et al 2004, Lubczynski & Gurwin 2005, Hunt et al 2006, Mylopoulos et al 2007, Gurwin & Serafin 2008, Michalak 2008. A proper identification of near the surface aquifers is crucial due to the role in formation of groundwater resources of multilayer systems (Macioszczyk 1997, Gurwin 2003.…”

Section: Methodsmentioning

confidence: 99%

Numerical model schematization of a complex hydrostructural Cretaceous groundwater basin for the purpose of protection zone evaluation

Gurwin

2017

geol

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Abstract:One of the major projects in regional hydrogeological investigations in Poland is a multi-annual cycle of studies on the implementation of programs and documentation in relation to the establishment of protection areas for the Major Groundwater Basins (MGBs). Depending on the size of the area and complexity of the selected aquifer system, the work on the numerical model becomes adequately demanding. The model must in this case be designed as a three-dimensional, multi-layered, taking into account the role of a near the surface aquifer in the potential rate of migration of contaminants. It is particularly difficult to design models of the basins located in the older Mesozoic hydrogeological structures of dual-porosity characteristic, covered by Neogenic and Quaternary sediments. One of these basins is MGB No. 317 (ed. Kleczkowski 1990) identified within the northern Sudetic trough. The boundaries of the MGB are associated with the occurrence of structural aquifer limits, including the relatively large area of outcrops of the upper Cretaceous sediments with a narrow zone of Triassic outcrops. The paper presents the main assumptions of the model schematization, especially regarding the parameterization of hydrostructural conditions in integration with geoinformatic tools and MODFLOW modules. This study is focused on the problems associated with the proper schematization of the multilayer groundwater system on a regional scale, particularly with regard to the first aquifer and its hydraulic contact with the Mesozoic water-bearing horizons of the MGB. Model simulations, together with a semi-analytical analysis of the rate of flow in the vadose zone, finally allowed to determine the protection area of the MGB that is presented.

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“…In current scenario, GIS is regarded as essential and efficient technique for studies especially for extended and complex groundwater systems. The utilities and potentialities of GIS in hydrogeology and hydrologic modeling are only at its beginning, but many successful applications have already started to develop (Bhasker et al 1992;Gossel et al 2004) and GIS has more scope in groundwater hydrologic modeling to develop better plans and pragmatic policy. There are few very good reviews on remote sensing and GIS applications in groundwater hydrology (Engman and Gurney 1991).…”

Section: Introductionmentioning

confidence: 99%

Integrating remote sensing, geographic information systems and global positioning system techniques with hydrological modeling

Thakur¹,

2016

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Integration of remote sensing (RS), geographic information systems (GIS) and global positioning system (GPS) are emerging research areas in the field of groundwater hydrology, resource management, environmental monitoring and during emergency response. Recent advancements in the fields of RS, GIS, GPS and higher level of computation will help in providing and handling a range of data simultaneously in a time-and cost-efficient manner. This review paper deals with hydrological modeling, uses of remote sensing and GIS in hydrological modeling, models of integrations and their need and in last the conclusion. After dealing with these issues conceptually and technically, we can develop better methods and novel approaches to handle large data sets and in a better way to communicate information related with rapidly decreasing societal resources, i.e. groundwater.

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A very large scale GIS-based groundwater flow model for the Nubian sandstone aquifer in Eastern Sahara (Egypt, northern Sudan and eastern Libya)

Cited by 98 publications

References 8 publications

Numerical groundwater modelling as an effective tool for management of water resources in arid areas

Numerical groundwater modelling as an effective tool for management of water resources in arid areas

Numerical model schematization of a complex hydrostructural Cretaceous groundwater basin for the purpose of protection zone evaluation

Integrating remote sensing, geographic information systems and global positioning system techniques with hydrological modeling

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