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Regionalization of low frequency curves for peninsular Malaysia

Al-Mamun, Abdullah and Hashim, A. and Daoud, Jamal Ibrahim (2010) Regionalization of low frequency curves for peninsular Malaysia. Journal of Hydrology, 381 (1-2). pp. 174-180. ISSN 0022-1694

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Regional maps and equations for the magnitude and frequency of 1, 7 and 30-day low flows were derived and are presented in this paper. The river gauging stations of neighbouring catchments that produced similar low flow frequency curves were grouped together. As such, the Peninsular Malaysia was divided into seven low flow regions. Regional equations were developed using the multivariate regression tech- nique. An empirical relationship was developed for mean annual minimum flow as a function of catch- ment area, mean annual rainfall and mean annual evaporation. The regional equations exhibited good coefficient of determination (R2 > 0.90). Three low flow frequency curves showing the low, mean and high limits for each region were proposed based on a graphical best-fit technique. Knowing the catchment area, mean annual rainfall and evaporation in the region, design low flows of different durations can be easily estimated for the ungauged catchments. This procedure is expected to overcome the problem of data unavailability in estimating low flows in the Peninsular Malaysia

Item Type: Article (Journal)
Uncontrolled Keywords: Mean annual evaporation Mean annual rainfall Low flow Frequency curve Regionalisation Regression analysis and ungauged catchment
Subjects: Q Science > QE Geology
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button): Kulliyyah of Engineering > Department of Science
Kulliyyah of Engineering
Depositing User: Assoc.Prof.Dr Jamal Daoud
Date Deposited: 01 Aug 2022 09:17
Last Modified: 01 Aug 2022 09:33
URI: http://irep.iium.edu.my/id/eprint/98996

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