Evaluation of Artificial Recharge on Groundwater Using MODFLOW Model (Case Study: Gotvand Plain-Iran)

摘要

Themanaged recharge of groundwater is a stable and newfound technique which hasalready produced successful results and is expected to solve many of theproblems of water resources, particularly in arid and semiarid areas. Theaquifer artificial recharge is considered as a strategy for the improvement anddevelopment of groundwater resources and their storage to compensate for thedamage to them. In this regard, the advanced models of groundwater offersuitable tools for the management and assessment of aquifers. The mainobjective of this research is Simulation of Gotvand Plain aquifer using MODFLOWcode of GMS software is the primary objective of this research. The otherobjective is assessing the artificial recharge project of Abbid-Sarbishelocated in north of Gotvand. For this purpose, the studyarea was discretized in GMS software and the initial and boundary conditionswere specified. Then, the model was calibrated from September 2009 to August2010 in an unsteady state during 12 stress periods. After the optimization of hydrogeologicparameters, the model was validated from September 2009 to August 2010 and thenit was used to assess the artificial recharge. By analyzing the water budgetmodel, the behavior of piezometers and the observed data, the hydraulic ofgroundwater was evaluated. The results indicate that artificial recharge hasbeen effective in the western parts of the project and the most effectiverecharge has occurred during 2005-2006 and 2006-2007 around the piezometer G19.This project has a positive effect on the aquifer, but due to seasonalwater-flood spreading, sedimentation, and drought in the past years, its effectis not sufficient.