الفهرس 
The goals of the study
Geophysical investigationsOnly 14 pages are availabe for public view
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Abstract
Climate change is one of the most significant natural processes and a serious threat to humankind. It results in a rise in sea levels, a reduction in precipitation, and an increase in surface water evaporation. Coastal aquifers, which are a significant supply of freshwater in dry and semi-arid regions, are one of the areas most impacted by this phenomenon. Increased abstraction from coastal aquifers reduces freshwater runoff into the ocean. As a result, there is an increase in inland seawater intrusion, and wells are contaminated by lowering water quality through increasing salinity. One of these aquifers is the Nile Delta aquifer (NDA) in Egypt, which is one of the largest ground water aquifers in the world with an area of 22,000 . This aquifer is exposed to severe seawater intrusion from the Mediterranean Sea. The primary goals of this study are to apply the numerical models Visual MODFLOW and SEAWAT to examine how climatic change would affect seawater intrusion in the Nile Delta aquifer. Also, Geographic Information System (GIS) is used to prepare maps and export it to Visual MODFLOW and SEAWAT to start the simulation process. Visual MODFLOW is used to simulate ground water head. A groundwater model for the NDA was developed using the SEAWAT program to simulate the intrusion of saltwater. In addition to the basic case, six other scenarios have been suggested considering a combination between sea level rise (SLR) and change in the withdrawal rate. A comparison between the Equiconcentration line 1000 ppm which represents the fresh water line of the base case for current study, and the Equi-concentration line for 1960, 1980, and 1992 are examined to study the creep of salt water. The comparison revealed that the creep occurs at west and middle of NDA, but lagged at east. For scenarios the results showed that the sixth scenario, which assumed sea level rise by 0.5 m and double the base case abstraction rate is the worst scenario. Therefore, the withdrawal from wells must be reduced or at least maintained at the same rate, Use the shore protection methods should be used to prevent the advancement of shore line.