Flood-flow characteristics of equatorial natural rivers in Sarawak, Malaysia

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Main Authors: Lai, Sai Hin, Dr., Nabil, Bessaih, Assoc. Prof. Dr., Law, Puong Ling, Assoc. Prof. Dr., Nor Azazi, Zakaria, Prof. Dr., Aminuddin, Ab. Ghani, Prof. Dr., Mah, Darrien Yau Seng
Other Authors: redaclai@eng.usm.my
Format: Article
Language:English
Published: The Institution of Engineers, Malaysia 2011
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Online Access:http://dspace.unimap.edu.my/xmlui/handle/123456789/13623
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spelling my.unimap-136232011-08-26T13:42:49Z Flood-flow characteristics of equatorial natural rivers in Sarawak, Malaysia Lai, Sai Hin, Dr. Nabil, Bessaih, Assoc. Prof. Dr. Law, Puong Ling, Assoc. Prof. Dr. Nor Azazi, Zakaria, Prof. Dr. Aminuddin, Ab. Ghani, Prof. Dr. Mah, Darrien Yau Seng redaclai@eng.usm.my Discharge estimation Flow resistance Natural river Overbank flow Velocity distribution Link to publisher's homepage at http://www.myiem.org.my/ A study on two natural rivers during flood events located in the outskirt of Kuching city, Sarawak is carried out. This paper presents the results obtained from the field measurements, including velocity distributions, stage discharge relationships, roughness behaviours and discharge estimation. These have illustrated a large difference in velocity between the main channel and floodplain under flood conditions, and the effects of momentum transfer between deep and shallow flow, which include reduction in main channel velocity and discharge capacity, leading to a reduction in compound section capacity at depth above bankfull. Another significant characteristic for flow in natural rivers is that the floodplain regions are found to behave as a storage reservoir instead of conveying excess water. Flow resistance relationships have been presented in terms of Manning’s coefficient and Darcy-Weisbach friction factor, showing the complex nature of flow resistance in flooded natural rivers and further explaining the danger inherent in the conventional practices of extrapolating inbank data for the analysis of overbank flows. Results for discharge estimation have been shown for comparison with actual data, the errors incurred by applying empirical methods to compound channel flows have been quantified and found to depend on the particular method used. 2011-08-26T13:42:49Z 2011-08-26T13:42:49Z 2008-12 Article The Journal of the Institution of Engineers, Malaysia, vol. 69(4), 2008, pages 1-8 0126-513X http://www.myiem.org.my/content/iem_journal_2008-179.aspx http://hdl.handle.net/123456789/13623 en The Institution of Engineers, Malaysia
institution Universiti Malaysia Perlis
building UniMAP Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Malaysia Perlis
content_source UniMAP Library Digital Repository
url_provider http://dspace.unimap.edu.my/
language English
topic Discharge estimation
Flow resistance
Natural river
Overbank flow
Velocity distribution
spellingShingle Discharge estimation
Flow resistance
Natural river
Overbank flow
Velocity distribution
Lai, Sai Hin, Dr.
Nabil, Bessaih, Assoc. Prof. Dr.
Law, Puong Ling, Assoc. Prof. Dr.
Nor Azazi, Zakaria, Prof. Dr.
Aminuddin, Ab. Ghani, Prof. Dr.
Mah, Darrien Yau Seng
Flood-flow characteristics of equatorial natural rivers in Sarawak, Malaysia
description Link to publisher's homepage at http://www.myiem.org.my/
author2 redaclai@eng.usm.my
author_facet redaclai@eng.usm.my
Lai, Sai Hin, Dr.
Nabil, Bessaih, Assoc. Prof. Dr.
Law, Puong Ling, Assoc. Prof. Dr.
Nor Azazi, Zakaria, Prof. Dr.
Aminuddin, Ab. Ghani, Prof. Dr.
Mah, Darrien Yau Seng
format Article
author Lai, Sai Hin, Dr.
Nabil, Bessaih, Assoc. Prof. Dr.
Law, Puong Ling, Assoc. Prof. Dr.
Nor Azazi, Zakaria, Prof. Dr.
Aminuddin, Ab. Ghani, Prof. Dr.
Mah, Darrien Yau Seng
author_sort Lai, Sai Hin, Dr.
title Flood-flow characteristics of equatorial natural rivers in Sarawak, Malaysia
title_short Flood-flow characteristics of equatorial natural rivers in Sarawak, Malaysia
title_full Flood-flow characteristics of equatorial natural rivers in Sarawak, Malaysia
title_fullStr Flood-flow characteristics of equatorial natural rivers in Sarawak, Malaysia
title_full_unstemmed Flood-flow characteristics of equatorial natural rivers in Sarawak, Malaysia
title_sort flood-flow characteristics of equatorial natural rivers in sarawak, malaysia
publisher The Institution of Engineers, Malaysia
publishDate 2011
url http://dspace.unimap.edu.my/xmlui/handle/123456789/13623
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score 13.222552