Study of Groundwater Response to Water Transfer from Outside Basin(Case Study: Water Transfer from Doosti Dam to Holy City of Mashhad)

With the development of cities and the increasing population and also the supply of water from outside of basins, an increase in the groundwater level occurs. In recent years, with the expansion of the boundary of the Mashhad city and increasing water needs of this metropolis, a large amount of water has been transferred from the surrounding area and catchment areas adjacent to the city. The transportation of the water and subsequent feeding of the water back into a limited area of the aquifer (in the Mashhad city) led to an increase in the groundwater level. In the present study, to analysis the delay time of the groundwater reaction, the data of the volume of transported water from the Doosti dam and the railway piezometer well data of Mashhad city has been collected from April 2005 to March 2013, then regression analysis has been used. Such analysis will help to manage water transmissions from adjacent areas and control the water level rising in cites. The results indicated that a 4-month delay exists for the observing the effects of the water volume entering the aquifer.