@article{article_345659, title={Modeling of Büyük Cırcıp Groundwater Recharge Dam using HYDRUS-1D}, journal={Avrupa Bilim ve Teknoloji Dergisi}, volume={7}, pages={7–17}, year={2017}, author={Ali, İssam and Doğan, Ahmet}, keywords={Yeraltısuyu Besleme,Güneydoğu Anadolu,Tekrar Şarj}, abstract={The purpose of this research is estimation of duration and amount of infiltration from the dam reservoir of Büyük Cırcıp groundwater recharge dam by Hydrus-1D model. Büyük Cırcıp groundwater recharge dam is one of the element of the southeastern Anatolian project in Turkey located on one of minor watercourse of great Euphrates River. The collected flood waters from rainy season (from October to May) are controlled by this small dam with 1.75 hm3 storage volume. The recharge dam reservoir bed has 15 meters thick alluvium layer overlain a permeable limestone. Groundwater depth under the reservoir is about 55 meters. The water seepage in this groundwater recharge dam is considered mainly vertical in the z-direction, therefore HYDRUS-1D software is suitable for modeling such 1-D infiltration. HYDRUS-1D, one of the most widely used models, can model water flow and solutes transport through the variable saturation media. The model uses finite element method for solving the Richards flow equation and contaminant transport equation. In this study, the model was used to calculate amount and duration of infiltration effectively under two cases: 1) 100-years flood and 2) annual flow. Results show that the time to fill up the dam depends on the hydrograph characteristics while the time to empty is related to the hydrogeological character of the reservoir bed alluvium. A sensitivity analysis for hydraulic conductivity of the alluvium was performed using the model. According to the results, technical recommendations were suggested to improve the efficiency by implementing a group of recharge wells to accelerate water infiltration through 15-m thick alluvium layer under the reservoir that has low permeability. The annual potential groundwater recharge for the basin was reported 97 hm3/year, however, this study shows that the infiltrated water into the ground through Büyük Cırcıp dam is about 10 hm3/year, which is one of 13 dam projects are planned to be implemented by GAP. <br /> <p> </p>}, number={11}, publisher={Osman SAĞDIÇ}