10:30 AM - 10:50 AM
[125] A Study on the Change in Rainwater Infiltration Functions of Green Spaces Affected by Urbanization
- Case Study at Shakujii River Middle Basin in Nerima Ward, Tokyo
Keywords:Green Infrastructure, Basin Measures, Rainwater Infiltration, Urban Farmland
In recent years, flood damage due to climate change has occurred all over the world. One of the countermeasures against flooddamage is Green Infrastructure. Long-term planning must take into account changes in rainwater infiltration functions of green spaces affected by urbanization, but there are few studies on it. In this study, we investigated changes in these functions affected by urbanization in the Shakujii River middle basin. The results showed that these functions decreased by 78.9% between 1950 and 1990, by 85.5% between 1950 and 2020, and continued to decrease after the area became urbanized. Furthermore, from the scenario analysis, it was found that these functions of 1.66 ㎜/h can be maintained in the future by farmland conservation policies. Parks, farmland, and these systems contributed to the maintenance of rainwater infiltration functions.