Assessment of application the artificial recharges methods of aquifer of Imamzadeh Jafar plain in Gachsaran-southwest of Iran
Subject Areas :
Khodarahm
Shafiei Motlagh
1
(مربی دانشگاه آزاد اسلامی واحد دهدشت)
Naser
Ebadati
2
(استادیار دانشگاه آزاد اسلامی واحد اسلامشهر)
Keywords: Ground water, artificial recharge, MODFLOW PMWIN, Kohgilooye, Boerahmad,
Abstract :
Before feeling water -shortage crisis human has understood the importance of water From the religioustexts. Considering recent conditions of the world the water will replace most recent boundaries, atfuture. Imamzadeh Jaafar plain is located 5 kilometers northeast of Gachsaran, south of Kohgilooye andBoerahmad province. The plain has 61km 2 area extents and contains two, alluvial and carbonateaquifers. These aquifers supply the water needs, agricultural, industrial and domestic. Highly exploitation andtransportation of groundwater resources, especially by National Oil Company, caused highly drawdown inalluvial aquifer, 1.85m in a 5 years period from 1361 to 1365 as reported by Mahab Ghods ConsultingEngineers. There are two artificial recharge projects, 1 flood spreading system and 1 recharge pondssystem, in the plain. To present the future water resources management program the hydrogeologicalbehaviors of the alluvial aquifer and the effects of artificial recharge must be evaluated. To develop theconceptual model of aquifer required information, meteorological, water level in the observationwells, depth to bedrock, hydrodynamic coefficients, topography, water resources and …, were collected, fieldsurveys were performed and required maps were prepared. Using conceptual model and MODFLOWPMWIN code the mathematical model of the plain was calibrated against water year 1380 -81 and thenverified against water year 1384 - 85. The verified model was used to predict future conditions ofaquifer. The results implied the rapid response of aquifer to precipitation due to high aquifertransmissivity, positive water budget at year 1385 comparing year 65, change of direction of groundwaterflow from plain outlet to the center of plain in response to highly exploitation at the center ofplain, water level in the wells located downward the flood spreading system will raise as 1 to 6m andwater level in t he wells located downward the recharge pond system will lower as 1 to 4m.