An assessment of river water quality : case study of Johor River basin, Malaysia

Water quality monitoring is one of the most important pillars in water resource management. However, water quality monitoring can be resource intensive, especially for developing countries with limited resources. As such, Water Quality Indices (WQIs) are developed as a convenient tool to summarise g...

Full description

Saved in:
Bibliographic Details
Main Author: Pak, Hui Ying
Other Authors: Shane Allen Snyder
Format: Thesis-Master by Research
Language:English
Published: Nanyang Technological University 2020
Subjects:
Online Access:https://hdl.handle.net/10356/145107
Tags: Add Tag
No Tags, Be the first to tag this record!
Institution: Nanyang Technological University
Language: English
id sg-ntu-dr.10356-145107
record_format dspace
spelling sg-ntu-dr.10356-1451072021-03-02T08:37:26Z An assessment of river water quality : case study of Johor River basin, Malaysia Pak, Hui Ying Shane Allen Snyder School of Civil and Environmental Engineering Advanced Environmental Biotechnology Centre (AEBC) ssnyder@ntu.edu.sg Engineering::Environmental engineering::Environmental protection Water quality monitoring is one of the most important pillars in water resource management. However, water quality monitoring can be resource intensive, especially for developing countries with limited resources. As such, Water Quality Indices (WQIs) are developed as a convenient tool to summarise general water quality into a single numerical value using a few water quality parameters. It helps to condense and communicate water quality information to policy-makers in an efficient way that could guide future water resource management. In addition, it is imperative to understand the influence of surrounding land use on water quality in order for effective water resource management to materialise. Water quality in Johor River is heavily influenced by surrounding land use within the Johor River Basin (JRB) in the state of Johor, Malaysia. In the recent years, there have been recurring reports of pollution in these rivers, which has generated concerns over the long-term sustainability of the water resources in the JRB. Specifically, this water resource is a shared commodity between two states, namely, Johor state of Malaysia and Singapore, a country located south of Johor. However, prior to this study, few research on the influence of land use configuration on water quality has been conducted in Johor. In addition, it is also unclear how point sources of pollution from wastewater treatment plants (WWTPs) influence water quality under different seasonality in the JRB. This study aims to develop a site-specific WQI for the Johor River Basin (JRB), Malaysia, and understand how external sources (i.e. land use and point sources) affect water quality. Water samples were collected from 49 sites within the JRB from March to December in 2019. Spatial analysis showed that the most polluted rivers were Chemangar, Lebam, and Tiram river, while Pelepah has the highest water quality as it consistently scored the highest WQI values across time. Results showed that influence from WWTPs on water quality was greater during the dry season, and less significant during the wet season. In particular, point source was highly positively correlated with ammoniacal-nitrogen (NH3-N). On the other hand, land use influence was greater than point source influence during the wet season. Residential and urban land use were important predictors for nutrients and organic matter (chemical oxygen demand); and forest land use were important sinks for heavy metals but a significant source of manganese. Master of Engineering 2020-12-11T02:29:35Z 2020-12-11T02:29:35Z 2020 Thesis-Master by Research Pak, H. Y. (2020). An assessment of river water quality : case study of Johor River basin, Malaysia. Master's thesis, Nanyang Technological University, Singapore. https://hdl.handle.net/10356/145107 10.32657/10356/145107 en This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License (CC BY-NC 4.0). application/pdf Nanyang Technological University
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic Engineering::Environmental engineering::Environmental protection
spellingShingle Engineering::Environmental engineering::Environmental protection
Pak, Hui Ying
An assessment of river water quality : case study of Johor River basin, Malaysia
description Water quality monitoring is one of the most important pillars in water resource management. However, water quality monitoring can be resource intensive, especially for developing countries with limited resources. As such, Water Quality Indices (WQIs) are developed as a convenient tool to summarise general water quality into a single numerical value using a few water quality parameters. It helps to condense and communicate water quality information to policy-makers in an efficient way that could guide future water resource management. In addition, it is imperative to understand the influence of surrounding land use on water quality in order for effective water resource management to materialise. Water quality in Johor River is heavily influenced by surrounding land use within the Johor River Basin (JRB) in the state of Johor, Malaysia. In the recent years, there have been recurring reports of pollution in these rivers, which has generated concerns over the long-term sustainability of the water resources in the JRB. Specifically, this water resource is a shared commodity between two states, namely, Johor state of Malaysia and Singapore, a country located south of Johor. However, prior to this study, few research on the influence of land use configuration on water quality has been conducted in Johor. In addition, it is also unclear how point sources of pollution from wastewater treatment plants (WWTPs) influence water quality under different seasonality in the JRB. This study aims to develop a site-specific WQI for the Johor River Basin (JRB), Malaysia, and understand how external sources (i.e. land use and point sources) affect water quality. Water samples were collected from 49 sites within the JRB from March to December in 2019. Spatial analysis showed that the most polluted rivers were Chemangar, Lebam, and Tiram river, while Pelepah has the highest water quality as it consistently scored the highest WQI values across time. Results showed that influence from WWTPs on water quality was greater during the dry season, and less significant during the wet season. In particular, point source was highly positively correlated with ammoniacal-nitrogen (NH3-N). On the other hand, land use influence was greater than point source influence during the wet season. Residential and urban land use were important predictors for nutrients and organic matter (chemical oxygen demand); and forest land use were important sinks for heavy metals but a significant source of manganese.
author2 Shane Allen Snyder
author_facet Shane Allen Snyder
Pak, Hui Ying
format Thesis-Master by Research
author Pak, Hui Ying
author_sort Pak, Hui Ying
title An assessment of river water quality : case study of Johor River basin, Malaysia
title_short An assessment of river water quality : case study of Johor River basin, Malaysia
title_full An assessment of river water quality : case study of Johor River basin, Malaysia
title_fullStr An assessment of river water quality : case study of Johor River basin, Malaysia
title_full_unstemmed An assessment of river water quality : case study of Johor River basin, Malaysia
title_sort assessment of river water quality : case study of johor river basin, malaysia
publisher Nanyang Technological University
publishDate 2020
url https://hdl.handle.net/10356/145107
_version_ 1695706228255096832