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    DETERMINATION OF RESERVOIR SEDIMENTATION WITH BATHYMETRIC SURVEY: A CASE STUDY OF OBRUK DAM LAKE
    (Parlar Scientific Publications (P S P), 2019) Ilci, Veli; Ozulu, Ibrahim Murat; Alkan, Reha Metin; Erol, Serdar; Uysal, Murat; Kalkan, Yunus; Seker, Dursun Zafer
    The sediments that transported in different ways to dam reservoirs decrease water storage capacity and shortens the reservoir lifetime. This forces the manager of water resources to monitor changes in water floor topography, and determine the sediment amount and sedimentation rate. This is very important in order to maintain current operations, make correct planning for future needs, take necessary precautions to prevent having a shorter lifetime than the projected durations and prolong the dams' lifetime. Although there are several different methods for determining the amount and rate of sediments, the most commonly used one is the bathymetric survey. In this study, in order to determine sedimentation of dams, a bathymetric survey was conducted in a part of the Obruk Dam Lake located in the Corum province of Turkey with the most recent geodetic equipment. The obtained results from the bathymetric survey are considered as initial results for the upcoming measurements to monitor the changes in sediment amount and sedimentation rate in the selected part of the Obruk Dam. The results imply that; the bathymetric surveying method is a powerful tool to estimate reservoir sedimentation.
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    Monitoring the deformation and strain analysis on the Ataturk Dam, Turkey
    (Taylor and Francis Ltd., 2018) Yavaşoğlu, Hasan Hakan; Kalkan, Yunus; Tiryakioğlu, İbrahim; Yiğit, Cemal Özer; Özbey, Volkan; Alkan, Mehmet Nurullah; Bilgi, Serdar; Alkan, Reha Metin
    Every man-made structure creates certain risks – dams are no exception. Most failures in man-made structures that have occurred could have been avoided if the structures’ behaviour had been inspected, monitored, and analyzed continuously, and if proper corrective measures had been taken in a timely fashion. The DSI (The General Directorate of State Hydraulic Works), which is the institution responsible for dam safety, has long used surveying methods to measure the displacements of geodetic points as a part of dam monitoring policy. In this study, we focus on the dam’s mechanical behaviour throughout a time period of more than 10 years. These study results have been derived from a separate, ongoing project that has monitored deformation on the Ataturk Dam and is now determining the water level of the reservoir. The project results show that although the dam body has become more stable and the water load behind the dam has increased, the rate of displacement of the dam has declined significantly. From these results, it can be seen that the reservoir water level can be increased evenly over time and that 542 m is the maximum water level of the dam’s reservoir. © 2017 The Author(s).