Browsing by Author "Ozturk, Sevki"

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A sustainable decision-making framework to evaluate land and seaside disposal options for tunnel spoil: A case study of Trabzon
(SCIENCE PRESS, 2025) Ali Ersin Dincer; Abdullah Demir; Sevki Ozturk; Kutay Yilmaz; Yilmaz, Kutay; Dincer, Ali Ersin; Demir, Abdullah; Ozturk, Sevki
Sustainable urbanization is essential for developing cities. To ensure the success of planned construction projects designers must prioritize sustainability by lowering emissions and reducing costs. Tunnel projects are common worldwide but disposing of the excavated material presents a significant challenge due to unsuitable geographic conditions. While coastal cities with mountainous terrains have historically used spoil for sea filling this study offers alternative landside options to promote sustainability. By using a conventional analytical hierarchy process (AHP) method for multi-criteria decision-making (MCDM) the study evaluates land use sustainability slope and drainage lines as constraints for the AHP method. The transportation-related greenhouse gas (GHG) emissions are also considered to reduce environmental damage. Particle swarm optimization is used to determine the minimum transportation distance from the excavation zone to the dumpsite. As a sub-criteria of land use the seaside is also considered a dumpsite compared with other options on the land side. The spatial analysis results of the case study show that suitable landside sites are available for the Trabzon tunneling project. Although coastal areas in Trabzon have been used for spoil dumping for filling purposes in the past landside deposition is a viable alternative. The suitability ranks of land and coastal filling options are relatively similar and selecting the seaside as the dumpsite for the Trabzon tunneling project reduces CO2 emissions. By adopting sustainable practices we can realize a better future for our cities and the environment.
Citation - WoS: 18
Citation - Scopus: 20
Effect of urbanization on surface runoff and performance of green roofs and permeable pavement for mitigating urban floods
(Springer Science and Business Media B.V., 2024) Şevki Ozturk; Kutay Yılmaz; A. Ersin Dinçer; Volkan Kalpakcı; Yilmaz, Kutay; Dincer, A. Ersin; Ozturk, Sevki; Kalpakci, Volkan
Floods are increasingly becoming a significant concern due to climate change global warming and excessive urbanization. The Intergovernmental Panel on Climate Change (IPCC) has projected that global warming will continue to contribute to more frequent and severe floods and hydrological extremes. In response to these challenges nature-based solutions (NBSs) have gained recognition as effective approaches to mitigate the adverse impacts of floods by focusing on ecosystem conservation restoration and sustainable utilization of natural resources. This study examines a flood that occurred in the Erkilet District of Kayseri Türkiye on September 22 2022 as a result of intense rainfall. It involves a thorough on-site investigation to assess the hydraulic hydrologic and geotechnical attributes of the study area. The findings from the field study indicate that the primary cause of the flood is attributed to excessive urbanization. To further analyze the impact of urbanization a hydraulic model is developed considering both the physical and topographical conditions of the study area for both the year 2006 and 2022. The simulation results reveal that the extent of inundation area and water depth has increased significantly due to the excessive urbanization that occurred within a 16-year period. Additionally the effectiveness of green roofs and permeable pavements as NBSs to mitigate urban flooding is explored. The implementation of green roofs and permeable pavements shows promising results reducing the adverse effects of urban floods by 3% to 8% depending on their specific locations and configurations. However the results suggest that NBSs alone cannot fully prevent floods so they should complement gray infrastructure. The novelty of the study lies in its ability to demonstrate the impact of urbanization and the effectiveness of nature-based solutions in mitigating flood extent based. © 2024 Elsevier B.V. All rights reserved.