Integration of Surface Wave Seismic Survey Testing Results and Segmented Seismic Source Model of NAFS for PSHA of the Gölyaka Düzce Tectonic Basin Turkey(2005)

Yousefibavil, Karim
Akgün, Haluk
Eker, Arif Mert
Cambazoğlu, Selim
Koçkar, Mustafa Kerem
This study mainly focuses on the determination of site effects for the Plio-Quaternary sediments of Gölyaka-Düzce, Turkey by characterizing local soil conditions. Probabilistic seismic hazard assessment (PSHA) analysis was performed to observe the effect and importance of local site conditions. The study area is located within the Eastern Marmara Region and uniquely falls within the bifurcated section of the North Anatolian Fault System (NAFS). This tectonic basin is bounded by the surface rupture of the 1999 Düzce and 1999 Kocaeli Earthquakes respectively from south and northwest. The local site conditions and dynamic sediment characteristics of the study area were evaluated by active and passive surface seismic surveys that were performed at 29 sites. By combining these, dispersion curves were obtained and high-resolution Vs profiles were successfully constructed. In the PSHA study, four different ground motion prediction equations were selected. Local site conditions and non-linear effects have a significant role in the damage pattern of the 1999 Kocaeli and Düzce Earthquakes and the PSHA analyses based on earthquake magnitude, proximity of the source and local site conditions as reflected from the results of the field surface wave measurements.


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In this study, Water Quality Analysis Simulation Program (WASP) was used to simulate the impacts of various phosphorus (P) load reduction scenarios on nutrient concentrations in Lake Uluabat, a Ramsar site (a wetland of international importance designated under the Ramsar Convention), including sediment dredging options and source reduction. The model was calibrated for various water constituents including ortho-phosphate (PO43-) and nitrate (NO3-). The calibrated model was used as a management tool to pred...
Citation Formats
K. Yousefibavil, H. Akgün, A. M. Eker, S. Cambazoğlu, and M. K. Koçkar, “Integration of Surface Wave Seismic Survey Testing Results and Segmented Seismic Source Model of NAFS for PSHA of the Gölyaka Düzce Tectonic Basin Turkey(2005),” Christchurch, Yeni Zelanda, 2015, Accessed: 00, 2021. [Online]. Available: