الفهرس 
IntroductionOnly 14 pages are availabe for public view
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Abstract
The problem of saltwater intrusion in coastal aquifers is a serious problem, especially in arid and semi- arid areas. Environmentally, the quality of groundwater and the factors affecting them are considered one of the most important concerns of relevant environmental studies. Heavy pumping from pumping wells systems, in these coastal areas, to meet growing demands for irrigation and domestic uses, decreases the seaward flow of freshwater. Consequently, the saltwater wedge migrates landward causing the problem of saltwater intrusion. The research under study has two main objectives. The first one aims to determine both the best wells alignment and pumping/recharging rates in confined and unconfined aquifers under steady state conditions. The second objective is a trial to present a solution for the problem of saltwater intrusion by finding a mathematical relationship between the quantities of recharged reclaimed water and the interface location. Then, the suitable value of recharged water can be mathematically determined. Applications have been performed in both unconfined aquifer at Miami Beach, Spain, and in confined aquifer at the north part of the Nile Delta, Egypt. Results show that, the best wells alignment is a regular one or two rows of wells subjected to uniform rate of pumping. While, the performance of all alternatives of recharged well systems is almost similar.