1. Department of Environmental Engineering, Faculty of Civil Engineering; Universiti Teknologi Malaysia; 81310 UTM Johor Bahru Johor Malaysia
2. Department of Environmental Engineering, Faculty of Engineering and Science; Curtin University; Miri Sarawak 98009 Malaysia
3. Centre for Environmental Sustainability and Water Security (IPASA), Research Institute for Sustainable Environment (RISE); Universiti Teknologi Malaysia; 81310 UTM Johor Bahru Johor Malaysia