Page - 927 - in Book of Full Papers - Symposium Hydro Engineering

Teorica ed Applicata, Vol.42, N.1-2, Mar-Jun., 3-18. 3. Campbell, KW (1981). Near-Source Attenuation of Peak Horizontal Acceleration: Bulletin Seism. Soc. Am., V.71, N.6, 2039-2070. 4. Boore, DM, Joyner, WB. and Fumal, TE (1993). Estimation of response spectra and peak accelerations from Western North American earthquakes. An interim report. Open file report 93-509.U.S.G.S. 5. Boore, DM., Joyner, WB. and Fumal, TE (1997). Equation for Estimating Horizontal Response Spectra and Peak Acceleration from Western North American Earthquakes. A Summary of recent Work. Sesimological Reseach Letters, V.68, N.1, January /February, 128-153. 6. Gülkan, P and Kalkan,E (2002). Attenuation modeling of recent earthquakes in Turkey. Journal of Seismology, 6(3), 397-409. 7. FEMA (2005). Federal Guidelines for Dam Safety—Earthquake Analyses and Design of Dams. 8. ICOLD (2016). Selecting Seismic Parameters for Large Dams-Guidelines. ICOLD, Bulletin 148. 9. Bureau, GJ (2003). Dams and Appurtenant Facilities in Earthquake Engineering Handbook edited by Chenh, W.F and Scawthorn,C. CRS press, Bora Raton 26.1-26.47. 10. Tosun, H and Tosun,V (2017) Total risk and seismic hazard analyses of large dams in northwest Anatolia, Turkey. 85th Annual Meeting of International Commission on Large Dams, July 3-7, Prague. 11. ICOLD (1989). Selecting Parameters for Large Dams-Guidelines and Recommendations. ICOLD Committee on Seismic Aspects of Large Dams, Bulletin 72. 12. MTA (2013) Scale 1/1.125.000 Turkey Live Fault Map. General Directorate of Mineral Research and Exploration. Special publications series, Ankara, Turkey 13. DSİ (2012). Selection of Seismic Parameters for Dam Design. State Hydraulic Works, Ankara, 29 p (in Turkish). 14. DSİ (2016). Dams of Turkey. TR-COLD, Ankara, 602 p. SUMMARY Large reservoirs, which are located in or near urban areas, pose a high-risk potential for downstream life and property. Safety assessment requires for existing dams having large reservoirs built in the settlement area. There are some metropolitan provinces, which are under threatening of earthquakes. One of them is Izmir Metropolitan Area with five million people. Major earthquakes with the potential of threatening life and property occur frequently here. There are six large dams for providing domestic water for Izmir province. These are namely Alacatlı Kutlu Aktas, Balcova, Gordes, Guzelhisar, Tahtalı and Urkmez dams. The investigation area is structurally cut by numerous faults, which are resulted by horst-graben system in west Anatolia. The seismic hazard analyses have indicated that peak ground acceleration changes within a wide range (0.116 g and 0.442 g) for the six dam sites of this area. This study indicates that most of these large dams have high-risk class in the metropolitan area. Key words: Dam, seismic hazard, total risk 927