1. School of Postgraduate Studies, Universitas Djuanda, Jalan Tol Ciawi No. 1, Ciawi, Bogor 16720, Indonesia
2. Directorate General of Water Resources, Ministry of Public Works and Housing, Jalan Pattimura No. 20, Jakarta 12110, Indonesia
3. Department of Public Health, Faculty of Health, Universitas Nahdlatul Ulama Surabaya, Jalan Raya Jemursari No. 57, Jemur Wonosari, Surabaya 60237, Indonesia
4. Centre for Environmental Sustainability and Water Security (IPASA), Research Institute for Sustainable Environment, Faculty of Engineering, Universiti Teknologi Malaysia, UTM Skudai, 81310 Johor Bahru, Malaysia
5. Department of Civil Engineering, Faculty of Engineering, Universitas Pancasila, Jalan Raya Lenteng Agung No. 56-80, Srengseng Sawah, Jakarta 12640, Indonesia
6. Department of Statistics, Institut Teknologi Sepuluh Nopember, Sukolilo, Surabaya 60111, Indonesia