BEHAVIOUR OF CHANNELISED DEBRIS FLOW IN THE CROCKER RANGE OF SABAH, MALAYSIA: A CASE STUDY AT ULU MOYOG, PENAMPANG
Journal: Geological Behavior (GBR)
Author: Edgar Jr. Joe, Felix Tongkul, Rodeano Roslee
This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited
Debris flow remains as a damaging natural hazards in the Crocker Range of Sabah, Malaysia. This is due to the fact that it can move at high velocity and longer travel distance, bringing big volume of sediment. One of the most severely affected area due to debris flow in the Crocker Range is that at Jalan Penampang-Tambunan KM 38.80 in Ulu Moyog situated in the district of Penampang. Recurring events of the debris flow from the year 2012 until 2014 have rendered the major road trunk between the west coast and interior region of the state impassable to traffic for hours. Nevertheless, the study on its behaviour in terms of velocity, discharge, and travel distance is still limited to the best knowledge of the authors. Therefore, the objective of this study is to identify the behaviour of the local case of channelised debris flow at Jalan Penampang-Tambunan KM 38.80. Based on site inspection along the channel and computation of flow behaviour by using established equation, the study finds that the velocity, discharge, and travel distance are controlled by the various channel parameters such as the elevation, width, depth, and longitudinal gradient.