A Theoretical Model for Debris Flow Initiation by Considering Effect of Hydrodynamic Force
- DOI
- 10.2991/aer.k.210204.008How to use a DOI?
- Keywords
- debris flow initiation, steep slope, friction factor, entrainment sediment
- Abstract
Debris flow is a sediment disaster that mostly occurs in mountainous area. In Merapi Volcano, Indonesia, debris flow frequently caused damage of infrastructures, destroyed bridges, houses, and fatalities. According to historical debris flow events, debris flow in Merapi area is predominantly triggered by erosion process. Several researchers were developed formulas to predict initiation of debris flow. However, effect of hydrodynamics force have not been explicitly included in developing theory of debris flow mechanism. This paper proposed a theoretical method to predict initiation of debris flow through modification of previous formulas. Effect of hydrodynamics force were represented by friction factor and being considered in the theory. This research was supported by experimental test. It was carried out on flume with movable bed layer and steep slope condition. Critical flow depth at varied bed slope gradient was identified to investigate behavior of initiation mechanism of debris flow. Critical depth that was determined by this theory is considered overestimated the real debris flow compared to previous studies, yet it can give safer condition for debris flow warning case.
- Copyright
- © 2021, the Authors. Published by Atlantis Press.
- Open Access
- This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).
Cite this article
TY - CONF AU - Ani Hairani AU - Adam Pamudji Rahardjo PY - 2021 DA - 2021/02/10 TI - A Theoretical Model for Debris Flow Initiation by Considering Effect of Hydrodynamic Force BT - Proceedings of the 4th International Conference on Sustainable Innovation 2020–Technology, Engineering and Agriculture (ICoSITEA 2020) PB - Atlantis Press SP - 38 EP - 42 SN - 2352-5401 UR - https://doi.org/10.2991/aer.k.210204.008 DO - 10.2991/aer.k.210204.008 ID - Hairani2021 ER -