FLOOD HAZARD ANALYSIS DUE TO OVERTOPPING OF DALAMAN AKKOPRU DAM: A CASE STUDY

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Yılmaz K., Oruç Y., Darama Y., Melek A. B., Ünal Ç. I.

INTERNATIONAL CONFERENCE ON HYDROSCIENCE & ENGINEERING, İzmir, Turkey, 26 May - 27 October 2022, pp.591-602

  • Publication Type: Conference Paper / Full Text
  • City: İzmir
  • Country: Turkey
  • Page Numbers: pp.591-602
  • Middle East Technical University Affiliated: Yes

Abstract

A study was made to determine the hypothetical failure of the Dalaman Akköprü Dam by overtopping failure mechanisms. For this purpose, a 2D Hydraulic Model was constructed using HEC-RAS to determine the propagation of flood due to the failure of the dam body for this case. Froehlich equations were used to predict breaching parameters of the Akköprü Dam. After the calibration of the hydraulic model, the hydraulic model was run to determine the possible flooding of Ortaca, Dalaman, and Köyceğiz towns. Analysis of the results obtained from the modeling in the case of overtopping failure of the Akköprü Dam showed that the peak flood reaches to Ortaca and Dalaman towns in 2 hr 20 min 2 hr 50 min respectively and the significant portion of the study area highly populated, is located in the H6 hazard zone. Due to the high risk of H6 and H5 Type hazard class, structural failure may occur, city centers should be evacuated within 2 hours.