Effect of urbanization on surface runoff and performance of green roofs and permeable pavement for mitigating urban floods

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. Additionally, the effectiveness of green roofs and permeable pavements as nature-based solutions (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. 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.