THE APPLICATION OF MATHEMATICAL MODELS IN MANAGEMENT OF AQUIFER

ABSTRACT

Before feeling water -shortage crisis human has understood the importance of water From the

religious texts. Considering recent conditions of the world the water will replace most recent

boundaries, at future. Imamzadeh Jaafar plain is located 5 kilometers northeast of Gachsaran, south

of Kohgilooye and Boerahmad province. The plain has 61km 2 area extents and contains two,

alluvial and carbonate aquifers. These aquifers supply the water needs, agricultural, industrial and

domestic. Highly exploitation and transportation of groundwater resources, especially by National Oil

Company, caused highly drawdown in alluvial aquifer, 1.85m in a 5 years period from 1361 to

1365 as reported by Mahab Ghods Consulting Engineers. There are two artificial recharge

projects, 1 flood spreading system and 1 recharge ponds system, in the plain. To present the future

water resources management program the hydrogeological behaviors of the alluvial aquifer and the

effects of artificial recharge must be evaluated. edrock, hydrodynamic coefficients, topography, water

resources and were collected, field surveys were performed and required maps were prepared. Using

conceptual model and MODFLOW PMWIN code the mathematical model of the plain was

calibrated against water year 1380 -81 and then verified against water year 1384 - 85. The verified

model was used to predict future conditions of aquifer. The results implied the rapid response of

aquifer to precipitation due to high aquifer ransmissivity, positive water budget at year 1385

comparing year 65, change of direction of groundwater flow from plain outlet to the center of

plain in response to highly exploitation at the center of plain, water level in the wells located

downward the flood spreading system will raise as 1 to 6m and water level in t he wells located

downward the recharge pond system will lower as 1 to 4m.

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Medical Science