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Determination of best-fit distribution and rainfall events in Damansara and Kelantan, Malaysia

Ho, Ming Kang and Yusof, Fadhilah (2013) Determination of best-fit distribution and rainfall events in Damansara and Kelantan, Malaysia. Matematika, 29 (1b). pp. 43-52. ISSN 0127-8274

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Abstract

This paper presents a study to determine the best-f it distribution to represent the rainfall process in Damansara and Kelantan, Malaysi a. Three probability density functions, namely Wakeby distribution, Generalized Extreme Val ue function (GEV) and two-parameter Weibull distributions are selected and compared. Th e parameters of the distributions are estimated using L-moments method while the best-fit distribution is determined by using Kolmogorov-Smirnov goodness-of-fit test. In additio n, weighted-average algorithm which is based on the probability values from the stations i n Damansara and Kelantan is used to identify the occurrence of wet and dry events in th e rainfall data. The impact of different distributions used in the determination of rainfall events is evaluated by making comparison between the actual and the reconstructed rainfall d ata. The results indicate that the Wakeby distribution is the best-fit distribution to explai n the rainfall patterns in Damansara and Kelantan. However, Wakeby, GEV and Weibull distribu tions perform equally well in the estimation of wet and dry events in Damansara and Kelantan.

Item Type:Article
Uncontrolled Keywords:Rainfall
Subjects:Q Science > QC Physics
Divisions:Science
ID Code:47840
Deposited By: Haliza Zainal
Deposited On:07 Jul 2015 09:58
Last Modified:19 Jun 2017 10:56

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