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Low flow frequency analysis on selected rivers in malaysia

Prediction of low flow of a river in magnitude as well as in frequency is necessary for the planning and design of water resource projects since low flow affects significantly in water supply, water quality and river ecological status. A number of probability distributions are used to estimate low...

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Main Authors: Ni, Lar Win*, Khin, Maung Win*
Format: Article
Language:English
Published: Cafet Innova Technical Society 2014
Subjects:
TK Electrical engineering. Electronics Nuclear engineering
Online Access:http://eprints.intimal.edu.my/995/1/International%20Journal%20of%20Earth%20Sciences%20and%20Engineering.pdf
http://eprints.intimal.edu.my/995/
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spelling my-inti-eprints.9952017-11-27T07:20:26Z http://eprints.intimal.edu.my/995/ Low flow frequency analysis on selected rivers in malaysia Ni, Lar Win* Khin, Maung Win* TK Electrical engineering. Electronics Nuclear engineering Prediction of low flow of a river in magnitude as well as in frequency is necessary for the planning and design of water resource projects since low flow affects significantly in water supply, water quality and river ecological status. A number of probability distributions are used to estimate low flow discharges with various return periods of extreme hydrologic events. Among others, Gamma, Gumbel, Lognormal with 2 and 3 parameters, LogPearson Type III and Weibull distributions are used in this study. The objectives of this study are: (i) to carry out the low flow frequency analysis with the above mentioned probability distributions to selected rivers in Malaysia, (ii) to identify the most appropriate probability distribution for the basins under study and (iii) to determine the low flow for selected return periods. Frequency analysis is carried out using frequency factor method to determine annual minimum low flow. The two most commonly used tests of goodness of fit namely Chi-Square (CS) and Kolmogorov-Smirnov (KS) tests are applied to the data series to check the fit of probability distributions used in this study. Based on the analysis of statistical tests, Gamma, 2P and 3P Lognormal and Log-Pearson Type III distributions fit well to the Kelantan river. Gamma and Lognormal 3P distributions fit well to the Johor river. Lognormal 2P distribution is the best fit to the Muda river followed by Lognormal 3P distribution. In overall, 2P and 3P Lognormal distributions are recommended in estimation of low flow discharges for all the rivers under study which can be used in water quality and quantity management at gauged and ungagged sites. Cafet Innova Technical Society 2014 Article PeerReviewed text en http://eprints.intimal.edu.my/995/1/International%20Journal%20of%20Earth%20Sciences%20and%20Engineering.pdf Ni, Lar Win* and Khin, Maung Win* (2014) Low flow frequency analysis on selected rivers in malaysia. International Journal of Earth Sciences and Engineering, 7 (4). pp. 1316-1322. ISSN 0974-5904
institution INTI International University
building INTI Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider INTI International University
content_source INTI Institutional Repository
url_provider http://eprints.intimal.edu.my
language English
topic TK Electrical engineering. Electronics Nuclear engineering
spellingShingle TK Electrical engineering. Electronics Nuclear engineering
Ni, Lar Win*
Khin, Maung Win*
Low flow frequency analysis on selected rivers in malaysia
description Prediction of low flow of a river in magnitude as well as in frequency is necessary for the planning and design of water resource projects since low flow affects significantly in water supply, water quality and river ecological status. A number of probability distributions are used to estimate low flow discharges with various return periods of extreme hydrologic events. Among others, Gamma, Gumbel, Lognormal with 2 and 3 parameters, LogPearson Type III and Weibull distributions are used in this study. The objectives of this study are: (i) to carry out the low flow frequency analysis with the above mentioned probability distributions to selected rivers in Malaysia, (ii) to identify the most appropriate probability distribution for the basins under study and (iii) to determine the low flow for selected return periods. Frequency analysis is carried out using frequency factor method to determine annual minimum low flow. The two most commonly used tests of goodness of fit namely Chi-Square (CS) and Kolmogorov-Smirnov (KS) tests are applied to the data series to check the fit of probability distributions used in this study. Based on the analysis of statistical tests, Gamma, 2P and 3P Lognormal and Log-Pearson Type III distributions fit well to the Kelantan river. Gamma and Lognormal 3P distributions fit well to the Johor river. Lognormal 2P distribution is the best fit to the Muda river followed by Lognormal 3P distribution. In overall, 2P and 3P Lognormal distributions are recommended in estimation of low flow discharges for all the rivers under study which can be used in water quality and quantity management at gauged and ungagged sites.
format Article
author Ni, Lar Win*
Khin, Maung Win*
author_facet Ni, Lar Win*
Khin, Maung Win*
author_sort Ni, Lar Win*
title Low flow frequency analysis on selected rivers in malaysia
title_short Low flow frequency analysis on selected rivers in malaysia
title_full Low flow frequency analysis on selected rivers in malaysia
title_fullStr Low flow frequency analysis on selected rivers in malaysia
title_full_unstemmed Low flow frequency analysis on selected rivers in malaysia
title_sort low flow frequency analysis on selected rivers in malaysia
publisher Cafet Innova Technical Society
publishDate 2014
url http://eprints.intimal.edu.my/995/1/International%20Journal%20of%20Earth%20Sciences%20and%20Engineering.pdf
http://eprints.intimal.edu.my/995/
_version_ 1644541387663736832
score 13.211869

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