Computation of probable maximum precipitation for upper Rajang river basin, Sarawak

Developments of mega dam projects that are thriving in Sarawak particularly in the Upper Rajang River Basin may not only bring great prospects to this region, but could also cause irreversible destruction. Dam failures have always been associated with devastating floods. Correspond to maximum flo...

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Main Author:	Patrick, Marina
Format:	Thesis
Language:	English English
Published:	2014
Subjects:	GE Environmental Sciences QD Chemistry
Online Access:	http://ir.unimas.my/id/eprint/9100/1/Computation%20of%20Probable%20Maximum%20Precipitation%20For%20Upper%20Rajang%20River%20Basin%2C%20Sarawak%20%2824pgs%29.pdf http://ir.unimas.my/id/eprint/9100/8/Marina%20Patrick%20ft.pdf
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spelling	my-unimas-ir.91002023-06-22T02:09:03Z Computation of probable maximum precipitation for upper Rajang river basin, Sarawak 2014 Patrick, Marina GE Environmental Sciences QD Chemistry Developments of mega dam projects that are thriving in Sarawak particularly in the Upper Rajang River Basin may not only bring great prospects to this region, but could also cause irreversible destruction. Dam failures have always been associated with devastating floods. Correspond to maximum flood potential used for the safety of the dam spillway design is the Probable Maximum Precipitation (PMP). Therefore, this study attempted to estimate and analyse the PMP for different rainfall stations within Upper Rajang River Basin using the statistical approach and prepare the spatial distribution for 1-day areal PMP. The amount of subjectivity in PMP estimations can be minimized, and consistent results for any location can be achieved with this research. Comparisons of the PMP estimates based on the statistical approach of Hershfield (1965) were analysed with the PMP values computed using the National Hydraulic Research Institute of Malaysia (NAHRIM) Technical Research Publication No. 1 (TRP 1: 2008) manual, and the Conventional method of the statistical approach. The results obtained by these methods were then compared with hydrological studies by Sarawak Electricity Supply Cooperation, SESCO (1983). It was found that PMP estimates by NAHRIM (2008) is conservative and may not be feasible; Hershfield method can produce reasonable PMP estimates and is valid for subsequent design calculations; Conventional method is comparable to the Hershfield method and have produced more conservative results by performing quick statistical analysis. When PMP estimates achieved from each method was validated with the estimates by SESCO (1983), the closest value was from the Hershfield method. All three methods discussed have proven to be useful for PMP estimations when practiced vigilantly. Hence, the use of statistical approach is deeming acceptable for computation of PMP estimates. Universiti Malaysia Sarawak, (UNIMAS) 2014 Thesis http://ir.unimas.my/id/eprint/9100/ http://ir.unimas.my/id/eprint/9100/1/Computation%20of%20Probable%20Maximum%20Precipitation%20For%20Upper%20Rajang%20River%20Basin%2C%20Sarawak%20%2824pgs%29.pdf text en public http://ir.unimas.my/id/eprint/9100/8/Marina%20Patrick%20ft.pdf text en validuser masters Universiti Malaysia Sarawak, (UNIMAS) Faculty of Engineering
institution	Universiti Malaysia Sarawak
collection	UNIMAS Institutional Repository
language	English English
topic	GE Environmental Sciences QD Chemistry
spellingShingle	GE Environmental Sciences QD Chemistry Patrick, Marina Computation of probable maximum precipitation for upper Rajang river basin, Sarawak
description	Developments of mega dam projects that are thriving in Sarawak particularly in the Upper Rajang River Basin may not only bring great prospects to this region, but could also cause irreversible destruction. Dam failures have always been associated with devastating floods. Correspond to maximum flood potential used for the safety of the dam spillway design is the Probable Maximum Precipitation (PMP). Therefore, this study attempted to estimate and analyse the PMP for different rainfall stations within Upper Rajang River Basin using the statistical approach and prepare the spatial distribution for 1-day areal PMP. The amount of subjectivity in PMP estimations can be minimized, and consistent results for any location can be achieved with this research. Comparisons of the PMP estimates based on the statistical approach of Hershfield (1965) were analysed with the PMP values computed using the National Hydraulic Research Institute of Malaysia (NAHRIM) Technical Research Publication No. 1 (TRP 1: 2008) manual, and the Conventional method of the statistical approach. The results obtained by these methods were then compared with hydrological studies by Sarawak Electricity Supply Cooperation, SESCO (1983). It was found that PMP estimates by NAHRIM (2008) is conservative and may not be feasible; Hershfield method can produce reasonable PMP estimates and is valid for subsequent design calculations; Conventional method is comparable to the Hershfield method and have produced more conservative results by performing quick statistical analysis. When PMP estimates achieved from each method was validated with the estimates by SESCO (1983), the closest value was from the Hershfield method. All three methods discussed have proven to be useful for PMP estimations when practiced vigilantly. Hence, the use of statistical approach is deeming acceptable for computation of PMP estimates.
format	Thesis
qualification_level	Master's degree
author	Patrick, Marina
author_facet	Patrick, Marina
author_sort	Patrick, Marina
title	Computation of probable maximum precipitation for upper Rajang river basin, Sarawak
title_short	Computation of probable maximum precipitation for upper Rajang river basin, Sarawak
title_full	Computation of probable maximum precipitation for upper Rajang river basin, Sarawak
title_fullStr	Computation of probable maximum precipitation for upper Rajang river basin, Sarawak
title_full_unstemmed	Computation of probable maximum precipitation for upper Rajang river basin, Sarawak
title_sort	computation of probable maximum precipitation for upper rajang river basin, sarawak
granting_institution	Universiti Malaysia Sarawak, (UNIMAS)
granting_department	Faculty of Engineering
publishDate	2014
url	http://ir.unimas.my/id/eprint/9100/1/Computation%20of%20Probable%20Maximum%20Precipitation%20For%20Upper%20Rajang%20River%20Basin%2C%20Sarawak%20%2824pgs%29.pdf http://ir.unimas.my/id/eprint/9100/8/Marina%20Patrick%20ft.pdf
_version_	1783728030882988032

Computation of probable maximum precipitation for upper Rajang river basin, Sarawak

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