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¹ Akdeniz Ünivers ites i Ziraat Fakültes i Tarıms al Yapılar ve Sulama Bölümü , Antalya DOI : 10.16882/derim.2017.310035 Viewed : 1573 - Downloaded : 1337 In this study, it was used data such as inlet water flow, velocity, flow heights, out let flow etc. belonging to diversion dam made by DSI 13th Regional Directorate. These values were calculated according to the calculation criteria used during dam and diversion dam project planning of DSI 13 th Regional Directorate. Then, diversion dam was modeled in real size in ANSYS software. Thus, analysis was done by defining boundary and initial conditions to model created in the ANSYS software. Values obtained from end of the simulations such as efficiency of energy dissipating structures, the pressures that the flows will occur, velocity distributions, water flow model, changes in water depth along stilling basin were compared with the calculated values. At the end of the study, while the initial water velocity was 8.5 ms ^-1 and the water depth was 0.46 m obtained from DSI software, these values were measured as 4.8 ms ^-1 and 0.57 m respectively, after energy dissipating structures. Similarly, while the initial water velocity obtained at the end of the simulation is 8.5 ms ^-1, this value reduced to 4.4 ms^-1 after energy dissipating structures. Simulation results show that the CFD method can be used by researchers in the planning of engineering works such as dams and diversion dam because the flow values obtained are highly similar to the calculated values (92%). Keywords : Small dam; Energy dissipating structures; CFD; Simulation