EFFECT OF DIFFERENT PATTERNS OF INJECTION WELL SYSTEMS ON SALTWATER INTRUSION IN COASTAL AQUIFERS

This research investigates and compares three various patterns of external injection well systems on the final position of the interface toe. These patterns are: 1) One row of injection wells, 2) Double rows of injection wells with different locations, and 3) Staggered rows of injection wells. This paper also studied the effect of different rates of injection and variable distances from the coast on seawater interface movement. The results were compared with the results for other researchers. Finally this research studied the effect of the rainfall percolation on the behavior of the interface toe. This research deals with hypothetical coastal confined and unconfined aquifers under steady state conditions. The finite element method was applied for the groundwater flow equation under assumption of steady sharp interface in homogenous aquifer. A computer program named NUMERICAL with FORTRAN (77) language was used after several modifications to solve the mathematical concepts of the problem. Analytical method was used to verify the computer program. The Image theory and the superposition principle were the main tools used through the analytical procedures