عنوان مقاله [English]
Surface and ground water interaction modeling has always been one of the basic concerns in water resources management. Such interaction is usually considered as an internal boundary condition in modeling and exact state of the components would be determined throughout the simulation process. This will need sets of accurate data which confirms the use of assistant tools such as the satellite images and the Geographical Information System (GIS). In this research, the interaction of the Najafabad aquifer and the Zayandehrud river passing through has been modeled. A conjunctive model have been developed by modifying the watershed and aquifer limits using geological maps and DEM Sheets of the region as well as statistical analysis of related data. By using satellite images and GIS technique, in addition to the improvement of the model capabilities a data base for further studies has been established. Model outcomes in both steady and unsteady states proved the basic and important role of the river, recharging the neighboring area. River bed thickness was determined as an average for the 36 km river branch as one of the basic elements of the process. Mass exchanges were also defined separately at the end of each calculation steps as well as in average during each stress period.