Empirically based rainfall threshold for landslides occurrence in Cameron Highlands, Malaysia
High-intensity rainfall has been recognized as the main factor of the landslide events in Cameron Highlands. Locating at an abrupt altitude with high intensity rainfall annually caused many attempts of slope failures in this area. This catastrophe weakens the socio-economy and situates the peopl...
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| Main Authors: | , , , , |
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| Format: | Article |
| Language: | en en |
| Published: |
Springer Nature
2021
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| Subjects: | |
| Online Access: | http://irep.iium.edu.my/92249/7/92249_Empirically%20based%20rainfall%20threshold.pdf http://irep.iium.edu.my/92249/8/92249_Empirically%20based%20rainfall%20threshold_Scopus.pdf http://irep.iium.edu.my/92249/ https://link.springer.com/article/10.1007/s12205-021-1586-4 |
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| Summary: | High-intensity rainfall has been recognized
as the main factor of the landslide events in Cameron
Highlands. Locating at an abrupt altitude with high intensity rainfall annually caused many attempts of slope failures in this area. This catastrophe weakens the socio-economy and situates the people of Cameron Highlands in difficulty since they lost their source of income. The application of the early warning system is one of the effective methods to reduce the losses from this unforeseen circumstance. It could be coordinated by developing a dependable rainfall intensity-duration (I-D) threshold for estimating the shallow landslide. By
identifying twelve historical landslides in Cameron
Highlands, the important variables from the rainfall intensity-duration parameter can be acquired. The
proposed empirical rainfall intensity-duration (I-D) threshold for Cameron Highlands has been figured out as
0..075 I D 29.09 − = (I = rainfall intensity in mm/hr and D =
duration in hour). Furthermore, to identify the formulation
of I-D threshold from other regions, a comparison has been
carried out by identifying the I-D threshold proposed by
various researchers, which shows a reasonably higher
value for the I-D thresholds of Cameron Highlands. This
trend occurs due to the fact that rainwater requires more
time to adequately seep into the thicker layer of soil in
order to trigger the slope failure. |
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