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    Assessing disaster vulnerability and proposing an adaptive disaster risk reduction framework: the case of Istanbul
    (Springer, 2025) Haksevenler, Betul Hande Gursoy; Senik, Berfin; Sengul, Zeynep; Akpinar, Aydin
    The importance of vulnerability analysis in disaster management is increasingly recognized, especially in megacities like Istanbul. This study focuses on conducting an in-depth analysis of the vulnerabilities of Istanbul's districts to various disasters such as earthquakes, landslides, floods, tsunamis, and sea-level rise. The evaluation considered three key factors: exposure, which refers to the shocks and stresses that a district may experience and the frequency and extent of potential losses; sensitivity, which indicates how the district responds to these shocks; and adaptive capacity, which reflects the district's ability to withstand and recover from such impacts. According to these key factors, indicators were identified, relevant data were collected and generated, and the Analytic Hierarchy Process method was applied for weighting. The study reveals that districts located in the southern belt, particularly those with dense urbanization and coastal areas, exhibit higher levels of vulnerability. Among Istanbul's 39 districts, 13 districts, including Gungoren, Bahcelievler, and Zeytinburnu, were classified as highly vulnerable. Additionally, 14 districts were moderately vulnerable, 9 had low vulnerability, and 3, including Silivri, Catalca, and Sile, had very low vulnerability. An adaptive disaster risk reduction framework was proposed for the districts. These findings are intended to assist local governments in more effectively planning disaster management and risk reduction strategies. The findings support Istanbul's resilience and offer valuable guidance for urban planning and disaster management, both locally and globally.
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    Developing a framework for a sustainable city index: A comprehensive approach to urban sustainability
    (Elsevier, 2025) Haksevenler, Betul Hande Gursoy; Senik, Berfin; Sengul, Zeynep; Sorhun, Engin
    This study aims to develop a Sustainable City Index to assess the sustainability performance of cities. In this context, Istanbul, with its 39 districts of diverse characteristics, has been selected as a pilot case. Although the study focuses on districts, the large population of a single Istanbul district and consistent data accessibility enhance the index's relevance at the urban scale. The study integrates environmental, social, economic, and institutional indicators to establish a comprehensive index for evaluating urban sustainability. Additionally, considering the potential impact of different levels of urbanization on sustainability performance, spatial analyses based on population density and land permeability have been conducted, and the applicability of the developed index has been examined for districts with varying degrees of urban development, including both densely built-up centers and urban peripheral areas. Furthermore, potential limitations in data accessibility have been considered, and reliable, representative indicators have been identified to assess whether it is feasible to develop a core Sustainable City Index. The findings indicate that the developed index not only provides meaningful results in measuring the sustainability performance of a city but also remains applicable to spatial contexts with differing urbanization intensities. Moreover, it demonstrates that sustainability performance can be effectively evaluated using a smaller set of representative indicators. This index serves as a valuable tool for policymakers and urban planners in developing context-specific sustainability strategies while also offering a widely applicable methodology.
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    Integrating Sustainable Development Into Urban Management: A Strategic Green City Index for Cities
    (Wiley, 2025) Gursoy Haksevenler, Betul Hande; Akpinar, Aydin; Sengul, Zeynep; Senik, Berfin; Orak, Nur Hanife; Sorhun, Engin
    A growing interest exists in robust tools to evaluate urban environmental performance. This study introduces a Green City Index framework, designed to assess and compare the sustainability of urban districts. Istanbul, with its significant population density and economic influence, serves as the pilot city in T & uuml;rkiye. The study included (i) examining existing city indices, (ii) identifying indicators for environmental quality (EQ), community welfare, and DS, (iii) collecting and producing relevant data, and (iv) establishing the Green City Index using the Analytic Hierarchy Process. The highest-scoring district in Istanbul achieved only 59 out of 100, indicating that no district's environmental performance is sufficiently strong. Even in well-managed districts, EQ was lacking. A significant relationship between the total index and other subcategories was observed. Recognizing index development as dynamic, this Green City Index provides decision-makers with a tool for strategic urban management, helping them assess and improve sustainability efforts in line with long-term goals.