Estimation of 1-day extreme rainfall by Hershfield Method for Klang River basin in Malaysia.

It is very important for the hydrologists, water resources engineers and relevant authorities to use the local data and be as accurate as possible in calculating the probable maximum flood (PMF) which, in turn, is strongly related to the extreme rainfall amount commonly known as probable maximum pre...

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Main Authors:	Al-Mamun, Abdullah, Muyibi, Suleyman Aremu, Kabbashi, Nassereldeen Ahmed, Shaaban, Ahmad Jamaluddin, Ghazali, Abdul Halim
Format:	Article
Language:	English
Published:	International Journal Organization 2010
Subjects:	TC Hydraulic engineering. Ocean engineering
Online Access:	http://irep.iium.edu.my/6402/ http://irep.iium.edu.my/6402/ http://irep.iium.edu.my/6402/1/16_PMP_IJAS_Canada.pdf

id	iium-6402
recordtype	eprints
spelling	iium-64022011-12-19T09:33:42Z http://irep.iium.edu.my/6402/ Estimation of 1-day extreme rainfall by Hershfield Method for Klang River basin in Malaysia. Al-Mamun, Abdullah Muyibi, Suleyman Aremu Kabbashi, Nassereldeen Ahmed Shaaban, Ahmad Jamaluddin Ghazali, Abdul Halim TC Hydraulic engineering. Ocean engineering It is very important for the hydrologists, water resources engineers and relevant authorities to use the local data and be as accurate as possible in calculating the probable maximum flood (PMF) which, in turn, is strongly related to the extreme rainfall amount commonly known as probable maximum precipitation (PMP). The main objective of designing spillways using the PMF is to avoid the overtopping of dams as a result of very high rainfall. If the estimations are not correct the structures would be either under designed (which may have very severe consequences on the downstream areas) or over designed resulting in extra cost of the project. In Malaysia, the estimation of design floods in the past was done on the basis of frequency analysis, regional flood envelopes, historical flood marks, empirical equations and engineering judgement. Most of these estimations were based on transposition of data from foreign nations. This study took initiative to develop local statistical parameters for the quick estimation of PMP in the State of Selangor, which is the most important region of the country. Sixty-nine (69) rainfall stations were selected based on the quantity and quality of the data available. Hershfield method was applied on the local rainfall data to determine the most important parameter of the statistical model (Km), which varied within 5.5 and 13.7. The newly calculated daily PMP values (24-hour duration) were 2 to 3 times higher than the mean maximum rainfall values. The new method found to be more realistic with respect to the local rainfall pattern International Journal Organization 2010 Article PeerReviewed application/pdf en http://irep.iium.edu.my/6402/1/16_PMP_IJAS_Canada.pdf Al-Mamun, Abdullah and Muyibi, Suleyman Aremu and Kabbashi, Nassereldeen Ahmed and Shaaban, Ahmad Jamaluddin and Ghazali, Abdul Halim (2010) Estimation of 1-day extreme rainfall by Hershfield Method for Klang River basin in Malaysia. International Journal of Arts and Sciences, 3 (9). pp. 383-394. ISSN 1812-5654 http://www.internationaljournal.org/home.html
repository_type	Digital Repository
institution_category	Local University
institution	International Islamic University Malaysia
building	IIUM Repository
collection	Online Access
language	English
topic	TC Hydraulic engineering. Ocean engineering
spellingShingle	TC Hydraulic engineering. Ocean engineering Al-Mamun, Abdullah Muyibi, Suleyman Aremu Kabbashi, Nassereldeen Ahmed Shaaban, Ahmad Jamaluddin Ghazali, Abdul Halim Estimation of 1-day extreme rainfall by Hershfield Method for Klang River basin in Malaysia.
description	It is very important for the hydrologists, water resources engineers and relevant authorities to use the local data and be as accurate as possible in calculating the probable maximum flood (PMF) which, in turn, is strongly related to the extreme rainfall amount commonly known as probable maximum precipitation (PMP). The main objective of designing spillways using the PMF is to avoid the overtopping of dams as a result of very high rainfall. If the estimations are not correct the structures would be either under designed (which may have very severe consequences on the downstream areas) or over designed resulting in extra cost of the project. In Malaysia, the estimation of design floods in the past was done on the basis of frequency analysis, regional flood envelopes, historical flood marks, empirical equations and engineering judgement. Most of these estimations were based on transposition of data from foreign nations. This study took initiative to develop local statistical parameters for the quick estimation of PMP in the State of Selangor, which is the most important region of the country. Sixty-nine (69) rainfall stations were selected based on the quantity and quality of the data available. Hershfield method was applied on the local rainfall data to determine the most important parameter of the statistical model (Km), which varied within 5.5 and 13.7. The newly calculated daily PMP values (24-hour duration) were 2 to 3 times higher than the mean maximum rainfall values. The new method found to be more realistic with respect to the local rainfall pattern
format	Article
author	Al-Mamun, Abdullah Muyibi, Suleyman Aremu Kabbashi, Nassereldeen Ahmed Shaaban, Ahmad Jamaluddin Ghazali, Abdul Halim
author_facet	Al-Mamun, Abdullah Muyibi, Suleyman Aremu Kabbashi, Nassereldeen Ahmed Shaaban, Ahmad Jamaluddin Ghazali, Abdul Halim
author_sort	Al-Mamun, Abdullah
title	Estimation of 1-day extreme rainfall by Hershfield Method for Klang River basin in Malaysia.
title_short	Estimation of 1-day extreme rainfall by Hershfield Method for Klang River basin in Malaysia.
title_full	Estimation of 1-day extreme rainfall by Hershfield Method for Klang River basin in Malaysia.
title_fullStr	Estimation of 1-day extreme rainfall by Hershfield Method for Klang River basin in Malaysia.
title_full_unstemmed	Estimation of 1-day extreme rainfall by Hershfield Method for Klang River basin in Malaysia.
title_sort	estimation of 1-day extreme rainfall by hershfield method for klang river basin in malaysia.
publisher	International Journal Organization
publishDate	2010
url	http://irep.iium.edu.my/6402/ http://irep.iium.edu.my/6402/ http://irep.iium.edu.my/6402/1/16_PMP_IJAS_Canada.pdf
first_indexed	2023-09-18T20:15:20Z
last_indexed	2023-09-18T20:15:20Z
_version_	1777407749476319232

Estimation of 1-day extreme rainfall by Hershfield Method for Klang River basin in Malaysia.

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