Abstract
For the basins with debris flow development, its channel terrain exhibits a tortuous shape, which significantly restricts the movement of debris flows and leads to severe erosion effects on the concave bank. Therefore, this study aims to analyze the shear force of debris flows within the bend channel. We established the relationship between the shear force and bend curvature through laboratory experiments. Under the long-term erosion by debris flows, the curvature radius of bends gradually increases, however, when this increasing trend reaches an equilibrium state with the intensity of debris flow discharge, there will be no significant change in curvature radius. In general, the activity pattern and discharges of debris flows would remain relatively stable. Hence, we can infer the magnitude of debris flow discharges from the terrain parameters of the bend channel.
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Acknowledgments
This study was funded by the National Natural Science Foundation of China (Grant No.42201095), the Second Tibetan Plateau Scientific Expedition and Research (STEP) Program (Grant No. 2019QZKK0902), and the Postdoctoral Special Funding Project of Sichuan Province (Funding No. TB2023028). The authors are thankful to Mr. Chen Shunli for his contribution to the preparation and implementation of the laboratory experiments.
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Lu Ming is responsible for conducting model experiments, data analysis, and manuscript writing. Liu Jinfeng is responsible for guiding, supervising, and providing financial support, while Sun Hao is responsible for guiding and proposing revision suggestions. Abrar Hussain is responsible for correcting grammar errors. Shang Yuqi and Fu Hang were responsible for assisting Lu Ming in conducting model experiments.
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Lu, M., Sun, H., Liu, J. et al. Discharge evolution law of debris flow based on a sharp bend physical modeling test. J. Mt. Sci. 21, 1904–1915 (2024). https://doi.org/10.1007/s11629-023-8434-6
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DOI: https://doi.org/10.1007/s11629-023-8434-6