Analysis of the influence of urban spatial and green infrastructure on flood adaptation

Abstract

Urban flooding is a global challenge that is expected to worsen as urbanization progresses and climate change worsens. Owing to its uncertainty, however, technical measures to handle this issue are limited. In this light, this study aims to improve the local disaster response capacity in the long-term by focusing on the urban space, especially green infrastructure, and by identifying the impact of green infrastructure on the occurrence of flooding. This study selected urban spatial factors and through a multiple regression analysis found that green infrastructure and urbanization sectors influenced urban flooding. To examine the urban parks with the highest influence in detail, spatial heterogeneity was analyzed through a geographically weighted regression (GWR) analysis of the factors affecting the occurrence of flooding. The study discovered that the more urbanized a city is, the greater the influence that parks have on flooding. This result can be used to reduce the occurrence of urban flooding and bring the hydrological response closer to that of the pre-urban state, as well as to prepare more appropriate green infrastructure designs and plans to improve regional disaster response capacity.