| Issue |
E3S Web of Conf.
Volume 415, 2023
8th International Conference on Debris Flow Hazard Mitigation (DFHM8)
|
|
|---|---|---|
| Article Number | 06021 | |
| Number of page(s) | 4 | |
| Section | Engineering and Mitigation | |
| DOI | https://doi.org/10.1051/e3sconf/202341506021 | |
| Published online | 18 August 2023 | |
A simplified numerical model for evaluating sediment control by open-type sabo dams in the Joganji River basin
1 Nippon Koei Co., Ltd., Land Infrastructure Development Operations, 5-4 Kojimachi, Chiyoda-ku, Tokyo 102-8539, Japan
2 Sabo and Landslide Technical Center, 2-7-5 Hirakawacho, Chiyoda-ku, Tokyo 102-0074, Japan
3 Ministry of Land, Infrastructure, Transport and Tourism Hokuriku Regional Development Bureau, Tateyama Mountain Area Sabo Office, 61 Bunazaka, Ashikuraji, Tateyama-machi, Nakaniikawa-gun, Toyama 930-1405, Japan
4 Professor Emeritus, Kitashirakawa Oiwake-cho, Sakyo-ku, Kyoto 606-8502, Japan
5 Disaster Prevention Research Institute, Kyoto University, Gokasho, Uji, Kyoto 611-0011, Japan
6 Nippon Koei Co., Ltd., Hokuriku Office, 5-1-43 Ekinishihonmachi, Kanazawa, Ishikawa 920-0025, Japan
7 Nippon Koei Co., Ltd., Osaka Branch Office, 1-2-5 Nishitenma, Kita Ward, Osaka 530-0047, Japan
8 Nippon Koei Co., Ltd., Research & Development Center, 2304 Inarihara, Tsukuba, Ibaraki 300-1259, Japan
* Corresponding author: a9651@n-koei.co.jp
The present study proposes a method to estimate sediment runoff by introducing a dam function of the relationship between inflow sediment and sediment runoff through a slit dam. The model can process rainfall runoff, sediment yield and runoff of a mountainous basin, and the model is applied to the upper reaches of the Joganji River basin, which is known for its huge amount of sediment runoff and intense bed variation because of the sediment yield caused by the earthquake in 1858. The performance of the calculations of sediment control of the slit dam is evaluated by the model. The result indicates that sediment deposition is significantly changed by sediment runoff. The proposed method can be expected to evaluate sediment transport with sabo dams on a basin scale.
© The Authors, published by EDP Sciences, 2023
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