Haruki Matsui

Haruki Matsui

Ph.D. student at Kyoto University

Publications

Journal Articles

Effect of Switching Storage on Reducing Flooding in Urban Area

Published in Journal of JSCE, 2025

In this study, we quantitatively evaluated the runoff suppression effect of stormwater storage facilities contributing to basin-wide flood management and examined optimal operational methods for these facilities. Focusing on Matsue City, Shimane Prefecture, the study proposes a switching storage operation method, adjusting the storage facility’s operation based on a threshold of 6.75 mm/hr, equivalent to the drainage capacity of the urban area, and synchronizing with the internal water level during inundation events. The results for the July 2006 heavy rainfall event show a peak reduction of approximately 2.6% in the total inundation volume and 3.7% in the urban inundation volume, with a 5.5% reduction in the area of above-floor flooding in urban areas. Furthermore, it was found that the “stormwater storage potential” of the storage facilities contributes to the runoff suppression effect. It is inferred that the runoff suppression effect of the storage facilities can be maximized by performing appropriate operations according to the rainfall pattern and scale.

Recommended citation: Haruki Matsui, Hibiki Kitajima, Kenji Kawaike, Takahiro Koshiba, Kazuki Yamanoi, and Keiko Wada. (2025). "Paper Title Number 1." Journal of JSCE. 81(16).
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Study of Numerical Simulations Based on Inundation Experiment Considering Infiltration into Building

Published in Journal of JSCE, 2024

Flooding experiments were carried out on a building arrangement that simulates an actual urban area and an urban area model that can consider inundation into buildings, and the overall behavior of the flood flow and the water depth at several points were measured. Based on this data, we verified three models that differ in how to handle inundation to buildings in the flood inundation analysis model for urban areas. Building Gap (BG) model in which the building boundary and the mesh boundary are matched and flooded through the slight gap in the building, Building Porosity (BP) model defined by the Ministry of Land, Infrastructure, Transport and Tourism, which evaluates by giving the porosity and drag coefficient in a uniform grid, Building in Mesh (BM) model that assumes a virtual building in a mesh. Of these, the BM model was able to express the inunda-tion situation of flood water without requiring a large computational load. In addition, it was also shown that the application of an unstructured grid that differentiates between streets and city blocks greatly im-proves the calculation results.

Recommended citation: Haruki Matsui, Kenji Kawaike, Kazuki Yamanoi, and Takahiro Koshiba. (2024). "Paper Title Number 1." Journal of JSCE. 80(16).
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Conference Papers

Paper Title Number 4

Published in GitHub Journal of Bugs, 2024

This paper is about fixing template issue #693.

Recommended citation: Your Name, You. (2024). "Paper Title Number 3." GitHub Journal of Bugs. 1(3).
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