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 ...
Read More
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 Nakhaei; M Vadiati; KH Mohammadi
Abstract
In the last few years, saline water intrusion in the Urmia aquifer has deteriorated groundwater quality. As a result of irremediable environmental impacts and deterioration of aquifer conditions, study on groundwater vulnerability due to saline water intrusion is very serious. This study focuses on the ...
Read More
In the last few years, saline water intrusion in the Urmia aquifer has deteriorated groundwater quality. As a result of irremediable environmental impacts and deterioration of aquifer conditions, study on groundwater vulnerability due to saline water intrusion is very serious. This study focuses on the application of the new method, GALDIT, for the assessment of aquifer vulnerability due to saline water intrusion in the Urmia Lake. The computing of the GALDIT index is based on six parameters:Groundwater occurrence (G), Aquifer hydraulic conductivity (A), High groundwater Level above sea level (L), Distance from shore (D), Impact of existing amplitude and extensive of saline water intrusion (I), and Thickness of aquifer (T). The results of this study showed GALDIT indices were very high, high, moderate, and low in the northeast, southeast, north, and low in east of the aquifer, respectively.The GALDIT approach assists to managers for evaluation of aquifer conditions.