Scholarlink

<p>Flood events, increasingly intensified by urbanization and climate change, pose critical risks to cities. This study evaluates urban flood exposure in the Manda Stream sub-watershed of İzmir, Türkiye, using high-resolution (0.5&#xa0;m) terrain data and HEC-RAS 2D simulations under 12h and 24h rainfall duration scenarios corresponding to a 1000 year flood discharge. Results show that the 24h event expands the flood extent by 18% and increases population exposure by 13.3% compared to the 12h event. Building exposure rises from 13,481 to 15,333 buildings, while vulnerable groups young (0–16 years) and the elderly (≥ 65 years), consistently make up 29% of those at risk. Spatial disparities across neighborhoods highlight the influence of terrain, land use, and urban form on flood vulnerability. Findings emphasize the importance of incorporating rainfall duration into urban flood risk assessments and advocate for localized adaptation strategies. These include early warning systems, resilient infrastructure, and Nature-based Solutions to safeguard vulnerable populations. The study supports the integration of disaster risk reduction into sustainable urban planning, aligning with Sustainable Development Goals (SDGs).</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Integrating rainfall duration to urban flood exposure assessment in Bornova Watershed, Izmir, Turkey

  • 期刊论文

  • 发表日期：

    2026年2月27日

查看全文
  • Ahsen Tuğçe Yüksel,
  • Çiğdem Coşkun Hepcan

摘要

Flood events, increasingly intensified by urbanization and climate change, pose critical risks to cities. This study evaluates urban flood exposure in the Manda Stream sub-watershed of İzmir, Türkiye, using high-resolution (0.5 m) terrain data and HEC-RAS 2D simulations under 12h and 24h rainfall duration scenarios corresponding to a 1000 year flood discharge. Results show that the 24h event expands the flood extent by 18% and increases population exposure by 13.3% compared to the 12h event. Building exposure rises from 13,481 to 15,333 buildings, while vulnerable groups young (0–16 years) and the elderly (≥ 65 years), consistently make up 29% of those at risk. Spatial disparities across neighborhoods highlight the influence of terrain, land use, and urban form on flood vulnerability. Findings emphasize the importance of incorporating rainfall duration into urban flood risk assessments and advocate for localized adaptation strategies. These include early warning systems, resilient infrastructure, and Nature-based Solutions to safeguard vulnerable populations. The study supports the integration of disaster risk reduction into sustainable urban planning, aligning with Sustainable Development Goals (SDGs).