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THE GENERATION OF SYNTHETIC SEQUENCES OF MONTHLY CUMULATIVE RAINFALLS USING FFT AND LEAST SQUARES METHOD

Zakaria, Ahmad (2008) THE GENERATION OF SYNTHETIC SEQUENCES OF MONTHLY CUMULATIVE RAINFALLS USING FFT AND LEAST SQUARES METHOD. In: Seminar Hasil Penelitian & Pengabdian Kepada Masyarakat, 18 - 19 September 2008, Universitas Lampung.

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    Abstract

    Commonly rainfall models are used by engineers and hydrologists for the civil engineering planning, infrastructure planning, determination of drainage coefficients for catchments area and determination of maximum discharge. The objective of this research is to generate the synthetic sequences of rainfall using Fourier transform and least squares method. The rainfall time series is assumed representing as an accumulation of trend, periodic and stochastic as its components. In this analysis, The Fast Fourier Transform (FFT) is used generate spectrum of rainfall time series. From the spectrum, frequency components of the periodicity of the rainfall involved trend, periodic and stochastic components are derived. The rainfall time series involved trend, periodic and stochastic is assumed as Fourier series. The least squares method is used to predict the components of the rainfall time series. The calculated results of synthetic sequences of the rainfall using Tukey-Coley and Matlab periodograms are compared with observed rainfall time series. The calculated rainfall time series results present the good agreement if compared with observed rainfall time series results. keyword : Rainfall, Fast Fourier Transform, Least Squares.

    Item Type: Conference or Workshop Item (Paper)
    Uncontrolled Keywords: Rainfall, Fast Fourier Transform, Least Squares.
    Subjects: T Technology > TA Engineering (General). Civil engineering (General)
    Divisions: Fakultas Teknik > S1 Teknik Sipil
    Depositing User: Admin Fakultas Teknik
    Date Deposited: 25 Apr 2016 18:17
    Last Modified: 25 Apr 2016 18:17
    URI: http://repository.unila.ac.id/id/eprint/874

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