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- Title
The Condition of the Debris Barrier for the Impulsive Force of Debris Flow by Climate Change.
- Authors
lee, Hojin; Kim, Sungduk; You, Kukhyun; Chang, Hyungjoon; Jun, Kyewon
- Abstract
The frequency of the heavy rainfall has been increasing due to the climate change, and itfurther amplifies the debris flow in a mountainous area with severe damages to property andlife. Here, we estimate impulsive force of debris flow on the debris barrier, which is installedunder the higher risks by the debris flow, with several scenarios including the various locationof the debris barrier and the variance of the inflow of water supply. In this research, weapplied the erosion and deposition model based on the numerical analysis model using FiniteDifference Method (FDM). In addition, the impact force of the debris flow influencing thedebris barrier is applied by governing equation satisfying the conservation law ofmass conservation and conservation of momentum considering the continuity ofthe fluid. The results of this model indicate that the peak impact force of debrisflow was captured at the section of 0-5 sec and 15-20 sec. This means that by theincreasing the water supply, the velocity of debris flow became faster, and by the fastervelocity of debris flow, the consolidation between the particle of the water andthe sediment made energy increased. Therefore, it is necessary to investigate theimpulsive force of the debris barrier at each position when a plurality of the debrisbarrier is continuously installed in the mountain area. The results of this study willprovide useful information for predicting the impulsive force of structures locatedin slope for the debris flow control and setting the proper position of the debrisbarrier. Acknowledgment: This research was supported by a grant(18CTAP-C141846-01) fromTechnology Advancement Research Program (TARP) funded by Ministry of Land,Infrastructure and Transport of Korean government
- Subjects
WENCHUAN Earthquake, China, 2008; CLIMATE change; RAINFALL frequencies; WATER supply; CONSERVATION laws (Physics); NUMERICAL analysis
- Publication
Geophysical Research Abstracts, 2019, Vol 21, p1
- ISSN
1029-7006
- Publication type
Article