Assessment of rainfall erosivity with regards to flood occurrence / Janmaizatulriah Jani

In Malaysia, major flood events usually occur during the Northeast and Southeast Monsoon due to continuous heavy rainfall. It is known that the rainfall has a strong correlation with flood occurrences. However, there is no study has been done to correlate the rainfall erosivity and flood occurrences...

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Main Author:	Jani, Janmaizatulriah
Format:	Thesis
Language:	English
Published:	2003
Subjects:	Earthwork Foundations
Online Access:	https://ir.uitm.edu.my/id/eprint/27609/1/TM_JANMAIZATULRIAH%20JANI%20EC%2003_5.pdf
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id	my-uitm-ir.27609
record_format	uketd_dc
spelling	my-uitm-ir.276092022-06-13T08:33:58Z Assessment of rainfall erosivity with regards to flood occurrence / Janmaizatulriah Jani 2003 Jani, Janmaizatulriah Earthwork. Foundations In Malaysia, major flood events usually occur during the Northeast and Southeast Monsoon due to continuous heavy rainfall. It is known that the rainfall has a strong correlation with flood occurrences. However, there is no study has been done to correlate the rainfall erosivity and flood occurrences. Therefore in this research the correlation between rainfall erosivity and flood occurrences will be established . Thus, the idea of this research is to get the erosive properties of rainfall; which are the amount , duration, intensity , energy and the erosivity of the rainfall. In this present study , five rivers , which are Klang, Muda, Pahang, Setiu, and Segamat River were selected. Historical rainfall data for three years (1997-1999) were recorded based on the worst cases of historical flood occurrence among the five rivers. The rainfall data during the flood occurrence were obtained from the Department of Irrigation and Drainage. The method adopted in analysing the rainfall erosivity (RE) and rainfall energy is based on the R factor of the Universal Soil Loss Equation. It is expected that the higher rainfall intensity will lead to the higher rainfall erosivity and major flood occurrence. From the results, it has been found that the maximum of 30 minute s rainfall amount affected some result of the rainfall erosivity . A statistical analysis shows that there is a non-linear relationship between rainfall erosivity and rainfall intensity . Transformation of data was employed and positive linear relationship was established between the log erosivity and log intensity and a new equation was obtained linking rainfall erosivity and intensity which is Log RE = 1.172Log RI + 1.118. This equation , within limits can be used as an indicator to predict future flood occurrence with regards to its intensity and erosivity of rainfall for these five rivers . 2003 Thesis https://ir.uitm.edu.my/id/eprint/27609/ https://ir.uitm.edu.my/id/eprint/27609/1/TM_JANMAIZATULRIAH%20JANI%20EC%2003_5.pdf text en public masters Universiti Teknologi MARA Faculty of Civil Engineering
institution	Universiti Teknologi MARA
collection	UiTM Institutional Repository
language	English
topic	Earthwork Foundations
spellingShingle	Earthwork Foundations Jani, Janmaizatulriah Assessment of rainfall erosivity with regards to flood occurrence / Janmaizatulriah Jani
description	In Malaysia, major flood events usually occur during the Northeast and Southeast Monsoon due to continuous heavy rainfall. It is known that the rainfall has a strong correlation with flood occurrences. However, there is no study has been done to correlate the rainfall erosivity and flood occurrences. Therefore in this research the correlation between rainfall erosivity and flood occurrences will be established . Thus, the idea of this research is to get the erosive properties of rainfall; which are the amount , duration, intensity , energy and the erosivity of the rainfall. In this present study , five rivers , which are Klang, Muda, Pahang, Setiu, and Segamat River were selected. Historical rainfall data for three years (1997-1999) were recorded based on the worst cases of historical flood occurrence among the five rivers. The rainfall data during the flood occurrence were obtained from the Department of Irrigation and Drainage. The method adopted in analysing the rainfall erosivity (RE) and rainfall energy is based on the R factor of the Universal Soil Loss Equation. It is expected that the higher rainfall intensity will lead to the higher rainfall erosivity and major flood occurrence. From the results, it has been found that the maximum of 30 minute s rainfall amount affected some result of the rainfall erosivity . A statistical analysis shows that there is a non-linear relationship between rainfall erosivity and rainfall intensity . Transformation of data was employed and positive linear relationship was established between the log erosivity and log intensity and a new equation was obtained linking rainfall erosivity and intensity which is Log RE = 1.172Log RI + 1.118. This equation , within limits can be used as an indicator to predict future flood occurrence with regards to its intensity and erosivity of rainfall for these five rivers .
format	Thesis
qualification_level	Master's degree
author	Jani, Janmaizatulriah
author_facet	Jani, Janmaizatulriah
author_sort	Jani, Janmaizatulriah
title	Assessment of rainfall erosivity with regards to flood occurrence / Janmaizatulriah Jani
title_short	Assessment of rainfall erosivity with regards to flood occurrence / Janmaizatulriah Jani
title_full	Assessment of rainfall erosivity with regards to flood occurrence / Janmaizatulriah Jani
title_fullStr	Assessment of rainfall erosivity with regards to flood occurrence / Janmaizatulriah Jani
title_full_unstemmed	Assessment of rainfall erosivity with regards to flood occurrence / Janmaizatulriah Jani
title_sort	assessment of rainfall erosivity with regards to flood occurrence / janmaizatulriah jani
granting_institution	Universiti Teknologi MARA
granting_department	Faculty of Civil Engineering
publishDate	2003
url	https://ir.uitm.edu.my/id/eprint/27609/1/TM_JANMAIZATULRIAH%20JANI%20EC%2003_5.pdf
_version_	1783733983049154560

Assessment of rainfall erosivity with regards to flood occurrence / Janmaizatulriah Jani

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