Regional rainfall frequency analysis for Samarahan river basin

Dayang Nazihah, Binti Abang Uthman. (2017) Regional rainfall frequency analysis for Samarahan river basin. [Final Year Project Report] (Unpublished)

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In the planning to mitigate flood, it is essential for engineers to determine the magnitude and frequency of rainfall. The rainfall frequency and magnitude can be achieved by using rainfall frequency analysis. In this study, a regional rainfall frequency of Samarahan River Basin is analysed. There are 12 rainfall stations in Samarahan River Basin area. However, only 11 rainfall stations are selected in this study due to inadequate number of data. The rainfall frequency analyses of each individual station in Samarahan River Basin are conducted using Gumbel distribution and Weibull plotting position formula. The curves that close to each other are grouped into the same region. Other factors such as topography, station elevation, type of rainfall distribution and isohyet are also considered in designing the region. Subsequently, a regional rainfall frequency map of Samarahan River Basin is established. The findings show that Samarahan River Basin can be divided into three homogenous regions. In comparison to previous research, there are changes in grouping the rainfall stations selected into regions due to different years of data used and number of rainfall stations selected. Nevertheless, the dissimilarity outcomes also may cause by other factors such as the changing of nature over time.

Item Type: Final Year Project Report
Additional Information: Project Report (B.Sc.) -- Universiti Malaysia Sarawak, 2017.
Uncontrolled Keywords: Samarahan River Basin, rainfall frequency, mitigate flood, topography, station elevation, unimas, university, universiti, Borneo, Malaysia, Sarawak, Kuching, Samarahan, ipta, education, undergraduate, research, Universiti Malaysia Sarawak.
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
Divisions: Academic Faculties, Institutes and Centres > Faculty of Engineering
Faculties, Institutes, Centres > Faculty of Engineering
Depositing User: Gani
Date Deposited: 07 Aug 2019 02:41
Last Modified: 20 Feb 2023 08:19

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