1. Professor, Dept. of Environmental Engineering, Faculty of Civil Engineering, Bogazici Univ., Bebek, Istanbul 34342, Turkey.
2. Professor, Dept. of Environmental Engineering, Faculty of Civil Engineering, Yildiz Technical Univ., Besiktas, Istanbul 34349, Turkey.
3. Assistant Professor, Dept. of Environmental Engineering, Faculty of Engineering, Munzur Univ., Merkez, Tunceli 62000, Turkey (corresponding author).