Evaluation the Role of Sarcahan-Floodwater Spreading in the Artificial Groundwater Recharge

Despite the arid and semi-arid climate of Iran, a considerable volume of water is out of the reach by annual flash flood events. Therefore, for solving the problem, Floodwater Spreading Systems have been implemented approximately since three decades ago. The aim of this study was to evaluate quantitative changes of the groundwater affected by the Sarcahan floodwater spreading which was implemented in Hormozgarn Province by using Control Volume technique. Sarcahan floodwater spreading project has been implemented in an area of 2000 hectares. The well-hydrographs, rainfall histographs, and the fluctuation of groundwater at observation wells in synchronizing with the frequency of flooding were used to evaluate the effect of the project on the groundwater. Examined observation wells showed a relative increase in the level of groundwater after the primarily flood controlling so that the hydrograph of observation well located in the area of flooding has considerably risen about 1.34 meters. Groundwater levels changes recorded at the observation wells are quite similar to the feeding/withdrawing ratio whereas in 2008 groundwater level increased about 4.43 meters. Furthermore, in the Gahkom-Saadatabad the amount of rain more than 60 mm or continuous rainfall in large quantities can artificially recharge the aquifer. The results indicated that the