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Application of Fourier series in managing the seasonality of convective and monsoon rainfall

Norzaida, A. and Zalina, M. D. and Fadhilah, Y. (2016) Application of Fourier series in managing the seasonality of convective and monsoon rainfall. Hydrological Sciences Journal-Journal Des Sciences Hydrologiques, 61 (10). pp. 1967-1980.

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Official URL: http://dx.doi.org/10.1080/02626667.2015.1062892


This study assesses the performance of Fourier series in representing seasonal variations of the tropical rainfall process in Malaysia. Fourier series are incorporated into a spatial-temporal stochastic model in an attempt to make the model parsimonious and, at the same time, capture the annual variation of rainfall distribution. In view of Malaysia’s main rainfall regime, the model is individually fitted for two regions with distinctive rainfall profiles: one being an urban area receiving rainfall from convective activities whilst the other receives rainfall from monsoonal activities. Since both regions are susceptible to floods, the study focuses on the rainfall process at fine resolution. Fourier series equations are developed to represent the model’s parameters to describe their annual periodicity. The number of significant harmonics for each parameter is determined by inspecting the cumulative fraction of total variance explained by the significant harmonics. Results reveal that the number of significant harmonics assigned for the parameters is slightly higher in the region with monsoonal rains. The overall simulation results show that the proposed model is capable of generating tropical rainfall series from convective and monsoonal activities.

Item Type:Article
Subjects:T Technology > T Technology (General)
Divisions:Razak School of Engineering and Advanced Technology
ID Code:68857
Deposited By: Haliza Zainal
Deposited On:13 Nov 2017 00:31
Last Modified:20 Nov 2017 08:52

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