no35-41

[39] Research on the effectiveness of green infrastructure installation on underutilized land in cities with declining population

- Focusing on flood control and thermal environment improvement effects

○Shinji Hirai¹, Ryota Araki¹, Riki Yamaga², Syota Tamura¹, Takahiro Tanaka¹, Makoto Yokoyama³, Kaoru Matuo⁴ (1. Hiroshima Univ., 2. Urban Renaissance Agency, 3. Hukuyama City Univ., 4. Osaka Metropolitan Univ.)

Keywords:Green infrastructure, Underutilized land, Flood control, Thermal environment, Numeric calculation

Green infrastructure (GI) has attracted attention as a measure for mitigating flood damage and high urban temperatures caused by climate change. In recent years, the amount of underutilized land in local cities has increased significantly because of population decline, which can be effectively used as GI sites. This study was conducted in the central area of Kure City, Hiroshima Prefecture, to understand the effects of GI on flood control and thermal environment improvement and identify areas where GI introduction is highly effective. Findings show that the introduction of GI into underutilized land can somewhat reduce flood damage and urban hyperthermia. In particular, the introduction of GI into sloping urban areas with declining populations has proven to be effective.