Relationship Between Rainfall and Debris Flow Occurren ce in the Crocker Range of Sabah, Malaysia

Edgar Jr. Joe (), Rodeano Roslee () and Felix Tongkul
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Edgar Jr. Joe: Faculty of Science and Natural Resources, Universiti Malaysia Sabah, Jalan UMS, 88400, Kota Kinabalu, Sabah, Malaysia.
Rodeano Roslee: Natural Disaster Research Centre (NDRC), Universiti Malaysia Sabah
Felix Tongkul: Faculty of Science and Natural Resources, Universiti Malaysia Sabah

Malaysian Journal of Geosciences (MJG), 2018, vol. 2, issue 1, 18-29

Abstract: Debris flow occurrence are quite common in mountainous areas such as those in the Crocker Range of Sabah, Malaysia especially during prolonged heavy rainfall. Despite of the recurrence of debris flows in the area, not much information is known about the effect of rainfall on their occurrences. Based on the rainfall intensity-duration of two selected case studies at Jalan Penampang-Tambunan KM38.80 and Jalan Tamparuli-Ranau KM83.90, the debris flow threshold for the Crocker Range cases are approximate to that proposed by Montgomery et al. (2000) given by the equation of I = 9.9D-0.52 which is generally low. This implies that low-intensity rainfall is sufficient to trigger debris flows due to high availability of loose material and weak geological condition.

Keywords: Debris flow; rainfall; threshold; Crocker Range. (search for similar items in EconPapers)
Date: 2018
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Persistent link: https://EconPapers.repec.org/RePEc:zib:zbnmjg:v:2:y:2018:i:1:p:18-29

DOI: 10.26480/mjg.01.2018.18.29

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