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A Study on the Relationship between Climate Change and Peak Discharge in Sarawak River Basin

These Earth's climate is getting warmer, and the signs are everywhere. Abnormal river discharge is one of the impacts that can be found in local scale. This endangering condition leads to the necessary attention on river basin in Sarawak, Malaysia and hence gives birth to this study. The object...

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Main Authors: Syed Almunir, Bin Mohd Zarak, Adam, J.H.
Format: E-Article
Published: Universiti Malaysia Sarawak, (UNIMAS) 2013
Subjects:
GE Environmental Sciences
Online Access:http://ir.unimas.my/id/eprint/13977/
http://publisher.unimas.my/ojs/index.php/JCEST/article/view/123
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spelling my.unimas.ir.139772016-10-19T02:19:05Z http://ir.unimas.my/id/eprint/13977/ A Study on the Relationship between Climate Change and Peak Discharge in Sarawak River Basin Syed Almunir, Bin Mohd Zarak Adam, J.H. GE Environmental Sciences These Earth's climate is getting warmer, and the signs are everywhere. Abnormal river discharge is one of the impacts that can be found in local scale. This endangering condition leads to the necessary attention on river basin in Sarawak, Malaysia and hence gives birth to this study. The objective of this study is to examine the existence of climate change on Sungai Sarawak River Basin through a hydrologic analysis of river discharge of three water level stations: Station Rayu, Station Git and Station Buan Bidi. The methods applied are mass-curve coupled with Gumbel’s graphical statistical method and annual hydrograph. Mass curve plotted shows the deviation of cumulative peak discharge from its original trend with Stations Rayu, Git and Buan Bidi started straying since years 1998, 2001 and 2004 respectively. After breakpoint, Gumbel’s graphical statistical method for chance percent evaluation clearly implies the chance percent for all (exception for Station Buan Bidi) discharges has decreased throughout the years. Whereas Gumbel’s graphical statistical method for return period evaluation suggested an extension of return period after the transition year (exception for Station Rayu). Two graphical methods pointed to the same direction – rate of decline shifting is greater for high flow as compared to low flow. Broadly speaking, precipitation has not much effect on the discharge variation according to annual hydrographs plotted. However, an obvious decrease in monthly average discharge throughout 18 years was found after change at Station Rayu. This support the climate change fact of “dry getting drier”. Water shrinkage in Sarawak River Basin is expected to be experienced frequently in the future. Universiti Malaysia Sarawak, (UNIMAS) 2013 E-Article PeerReviewed Syed Almunir, Bin Mohd Zarak and Adam, J.H. (2013) A Study on the Relationship between Climate Change and Peak Discharge in Sarawak River Basin. UNIMAS e-Journal of Civil Engineering, 4 (3). pp. 23-28. ISSN 1985-3874 http://publisher.unimas.my/ojs/index.php/JCEST/article/view/123
institution Universiti Malaysia Sarawak
building Centre for Academic Information Services (CAIS)
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Malaysia Sarawak
content_source UNIMAS Institutional Repository
url_provider http://ir.unimas.my/
topic GE Environmental Sciences
spellingShingle GE Environmental Sciences
Syed Almunir, Bin Mohd Zarak
Adam, J.H.
A Study on the Relationship between Climate Change and Peak Discharge in Sarawak River Basin
description These Earth's climate is getting warmer, and the signs are everywhere. Abnormal river discharge is one of the impacts that can be found in local scale. This endangering condition leads to the necessary attention on river basin in Sarawak, Malaysia and hence gives birth to this study. The objective of this study is to examine the existence of climate change on Sungai Sarawak River Basin through a hydrologic analysis of river discharge of three water level stations: Station Rayu, Station Git and Station Buan Bidi. The methods applied are mass-curve coupled with Gumbel’s graphical statistical method and annual hydrograph. Mass curve plotted shows the deviation of cumulative peak discharge from its original trend with Stations Rayu, Git and Buan Bidi started straying since years 1998, 2001 and 2004 respectively. After breakpoint, Gumbel’s graphical statistical method for chance percent evaluation clearly implies the chance percent for all (exception for Station Buan Bidi) discharges has decreased throughout the years. Whereas Gumbel’s graphical statistical method for return period evaluation suggested an extension of return period after the transition year (exception for Station Rayu). Two graphical methods pointed to the same direction – rate of decline shifting is greater for high flow as compared to low flow. Broadly speaking, precipitation has not much effect on the discharge variation according to annual hydrographs plotted. However, an obvious decrease in monthly average discharge throughout 18 years was found after change at Station Rayu. This support the climate change fact of “dry getting drier”. Water shrinkage in Sarawak River Basin is expected to be experienced frequently in the future.
format E-Article
author Syed Almunir, Bin Mohd Zarak
Adam, J.H.
author_facet Syed Almunir, Bin Mohd Zarak
Adam, J.H.
author_sort Syed Almunir, Bin Mohd Zarak
title A Study on the Relationship between Climate Change and Peak Discharge in Sarawak River Basin
title_short A Study on the Relationship between Climate Change and Peak Discharge in Sarawak River Basin
title_full A Study on the Relationship between Climate Change and Peak Discharge in Sarawak River Basin
title_fullStr A Study on the Relationship between Climate Change and Peak Discharge in Sarawak River Basin
title_full_unstemmed A Study on the Relationship between Climate Change and Peak Discharge in Sarawak River Basin
title_sort study on the relationship between climate change and peak discharge in sarawak river basin
publisher Universiti Malaysia Sarawak, (UNIMAS)
publishDate 2013
url http://ir.unimas.my/id/eprint/13977/
http://publisher.unimas.my/ojs/index.php/JCEST/article/view/123
_version_ 1644511793437999104
score 13.211869

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