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Volume 13
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10.3390/w13081083
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Article

Rainfall Warning Model for Rainfall-Triggered Channelized Debris Flow Based on Physical Model Test—A Case Study of Laomao Mountain Debris Flow in Dalian City

by
Yuzheng Wang
,
Lei Nie
,
Chang Liu
*,
Min Zhang
,
Yan Xu
,
Yuhang Teng
,
Chonghao Bao
,
Yuanyuan He
,
Fansheng Kong
,
Xiangjian Rui
,
Tao Zhang
,
Chao Du
,
Lihaolin Jin
and
Zhengguo Li
College of Construction Engineering, Jilin University, Changchun 130026, China
*
Author to whom correspondence should be addressed.
Water 2021, 13(8), 1083; https://doi.org/10.3390/w13081083
Submission received: 26 March 2021 / Revised: 12 April 2021 / Accepted: 12 April 2021 / Published: 14 April 2021
(This article belongs to the Section Hydrology)
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Abstract

Debris flows are among the most frequent and hazardous disasters worldwide. Debris flow hazard prediction is an important and effective means of engineering disaster mitigation, and rainfall threshold is the core issue in debris flow prediction. This study selected the Laomao Mountain debris flow in Dalian as the research object and explored the relationship among the percentage of coarse sand content of soil, rainfall conditions and the critical rainfall values that induce debris flows on the basis of field investigation data, combined with the results of a flume test, soil suction measurement and geomechanical analysis. The new multi-parameter debris flow initiation warning models were obtained through the mathematical regression analysis method. The critical rainfall values of debris flows in this area were calculated by the previous research on the mechanism of hydraulic debris flow initiation (HIMM). Lastly, the multi-parameter debris flow initiation warning models were compared and analyzed with the critical rainfall values obtained using the HIMM method and the rainfall information available in historical rainfall data, and the reliability of the models was verified. The comparison results showed that the new multi-parameter debris flow initiation warning models can effectively modify the traditional intensity–duration model and have certain reliability and practical values. They can provide an effectual scientific basis for future work on the monitoring and prediction of debris flow disasters.
Keywords: debris flow; rainfall threshold; warning model debris flow; rainfall threshold; warning model

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MDPI and ACS Style

Wang, Y.; Nie, L.; Liu, C.; Zhang, M.; Xu, Y.; Teng, Y.; Bao, C.; He, Y.; Kong, F.; Rui, X.; et al. Rainfall Warning Model for Rainfall-Triggered Channelized Debris Flow Based on Physical Model Test—A Case Study of Laomao Mountain Debris Flow in Dalian City. Water 2021, 13, 1083. https://doi.org/10.3390/w13081083

AMA Style

Wang Y, Nie L, Liu C, Zhang M, Xu Y, Teng Y, Bao C, He Y, Kong F, Rui X, et al. Rainfall Warning Model for Rainfall-Triggered Channelized Debris Flow Based on Physical Model Test—A Case Study of Laomao Mountain Debris Flow in Dalian City. Water. 2021; 13(8):1083. https://doi.org/10.3390/w13081083

Chicago/Turabian Style

Wang, Yuzheng, Lei Nie, Chang Liu, Min Zhang, Yan Xu, Yuhang Teng, Chonghao Bao, Yuanyuan He, Fansheng Kong, Xiangjian Rui, and et al. 2021. "Rainfall Warning Model for Rainfall-Triggered Channelized Debris Flow Based on Physical Model Test—A Case Study of Laomao Mountain Debris Flow in Dalian City" Water 13, no. 8: 1083. https://doi.org/10.3390/w13081083

APA Style

Wang, Y., Nie, L., Liu, C., Zhang, M., Xu, Y., Teng, Y., Bao, C., He, Y., Kong, F., Rui, X., Zhang, T., Du, C., Jin, L., & Li, Z. (2021). Rainfall Warning Model for Rainfall-Triggered Channelized Debris Flow Based on Physical Model Test—A Case Study of Laomao Mountain Debris Flow in Dalian City. Water, 13(8), 1083. https://doi.org/10.3390/w13081083

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