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Rainfall characterisation by application of standardised precipitation index (SPI) in Peninsular Malaysia

Yusof, Fadhilah and Syed Jamaludin, Shariffah Suhaila and Yusop, Zulkifli and Foo, Hui Mean and Kong, Ching Yee (2014) Rainfall characterisation by application of standardised precipitation index (SPI) in Peninsular Malaysia. Theoretical and Applied Climatology, 115 (3-4). pp. 503-516. ISSN 0177-798X

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Official URL: http://dx.doi.org/10.1007/s00704-013-0918-9


The interpretations of trend behaviour for dry and wet events are analysed in order to verify the dryness and wetness episodes. The fitting distribution of rainfall is computed to classify the dry and wet events by applying the standardised precipitation index (SPI). The rainfall amount for each station is categorised into seven categories, namely extremely wet, severely wet, moderately wet, near normal, moderately dry, severely dry and extremely dry. The computation of the SPI is based on the monsoon periods, which include the northeast monsoon, southwest monsoon and inter-monsoon. The trends of the dry and wet periods were then detected using the Mann-Kendall trend test and the results indicate that the major parts of Peninsular Malaysia are characterised by increasing droughts rather than wet events. The annual trends of drought and wet events of the randomly selected stations from each region also yield similar results. Hence, the northwest and southwest regions are predicted to have a higher probability of drought occurrence during a dry event and not much rain during the wet event. The east and west regions, on the other hand, are going through a significant upward trend that implies lower rainfall during the drought episodes and heavy rainfall during the wet events.

Item Type:Article
Uncontrolled Keywords:dry season, index method
Subjects:Q Science
ID Code:62390
Deposited By: Widya Wahid
Deposited On:14 Jun 2017 09:06
Last Modified:14 Jun 2017 09:06

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