M. Morsali; M. Nakhaie; M. Rezaie; H. R. Naseri; J. Hassanpour
Abstract
Tehran- Karaj water conveyance tunnel (part 1), 16 kilometers in length, in the Karaj formation was excavated in order to convey the water from the Amir-Kabir dam to the Tehran refinery plant. The hydrogeology studies of the Karaj tunnel were done to discover the affecting parameters on the groundwater ...
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Tehran- Karaj water conveyance tunnel (part 1), 16 kilometers in length, in the Karaj formation was excavated in order to convey the water from the Amir-Kabir dam to the Tehran refinery plant. The hydrogeology studies of the Karaj tunnel were done to discover the affecting parameters on the groundwater inflow into the tunnel. Groundwater inflow was estimated by means of empirical and analytical methods. Daily measurements of inflow rate show that there are some differences between the calculated and the observed inflow value. In this research, based on the comparison between the observed and calculated groundwater inflow, some relations have been derived for similar hydrogeological conditions. In many hydrogeological conditions, the analytical equations are supervised on empirical formula. According to this research, addition to permeability and water head; geological structure, Precipitation and bedding dip have a significant effect in water inflow into tunnels. Also, most of groundwater inflow along the Karaj tunnel is largely related to the main geological features, such as folds, faults, dykes and open fractures and inflow is correlated with precipitation.
M. Rezaei; A. Sargezi
Abstract
Over-exploitation from Goharkuh plain aquifer, southwest of Zahedan, resulted in water table drawdown. In order to assessing the effect of artificial recharge, numerical model of groundwater flow of the aquifer was developed. Well loges, hydrogeologic parameters, pizometric heads and results of pumping ...
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Over-exploitation from Goharkuh plain aquifer, southwest of Zahedan, resulted in water table drawdown. In order to assessing the effect of artificial recharge, numerical model of groundwater flow of the aquifer was developed. Well loges, hydrogeologic parameters, pizometric heads and results of pumping tests were used in this study. The flow model is well calibrated and used to simulate future water level fluctuations. Steady state condition has been considered in January of 2003 because of low fluctuation in groundwater level in this period. The Sensivity analysis related to a few parameters and verification for period of February of 2004 to February of 2005 has performed. The results indicate that groundwater level is reducing in Goharkuh plain aquifer. Maximum drawdown occurs in the east part of the aquifer. Aquifer reaction has been assessed by definition of different scenarios to identify the best location for artificial recharge. Based on the result, the north part of the aquifer (close to pizometer P9) is the best location for performing artificial recharge.
