Extreme rainfall patterns for sg. Sarawak and Samarahan river basins

Wan Ahmad, W.F (2009) Extreme rainfall patterns for sg. Sarawak and Samarahan river basins. [Final Year Project Report] (Unpublished)

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Abstract

Rainfall patterns and frequency analysis are carried out based on rainfall data extracted from 23 rainfall stations in Sg. Sarawak and 7 rainfall stations in Samarahan basin. In this study, Daily Maximum Rainfall (DMR) and Monthly Mean Rainfall (MMR) data has been used for rainfall pattern analysis whereas rainfall frequency analysis procedure is applied only for DMR data. The objectives of this study are to constructing the extreme rainfall region map based on frequency analysis reduced variate curves which is the better plotting formula fit to Extreme Value Type I (EVI) distribution either plotting position formulae Gringorten and Weibull formula using Geographic Information System (GIS) application. Besides, these study also to determine the factors influencing the rainfall distribution in Sg. Sarawak basin and Samarahan basin. From the results and analysis, the rainfall distribution in coastal areas of Sg Sarawak basin is influencing by prevailing wind during northeast monsoon season where a regime of one maximum and minimum rainfall distribution can be observed. Meanwhile, those inland is less likely influenced where the rainfall is distributed quite evenly throughout the year. The results obtained from rainfall frequency analysis showed that the Gringorten formula gives least ratio than Weibull formula which is in accordance to previous study and literature review. From this result, frequency analyses in reduced variate graph are plotted for both basins and then the extreme rainfall region map are constructed using Geographic Information System (GIS) based on the graph.

Item Type: Final Year Project Report
Additional Information: Project Report (B.Sc.) -- Universiti Malaysia Sarawak, 2009.
Uncontrolled Keywords: Rain and rainfall, Measurement, Engineering, 2009, UNIMAS, Rainforest, Sarawak, Borneo, Universiti Malaysia Sarawak, research, undergraduate, university, universiti, Borneo, Malaysia, Sarawak, Kuching, Samarahan, IPTA, education
Subjects: G Geography. Anthropology. Recreation > GE Environmental Sciences
T Technology > TA Engineering (General). Civil engineering (General)
Divisions: Academic Faculties, Institutes and Centres > Faculty of Engineering
Depositing User: Karen Kornalius
Date Deposited: 25 Aug 2014 08:31
Last Modified: 23 Mar 2015 03:49
URI: http://ir.unimas.my/id/eprint/4539

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