1. Research Scholar, Dept. of Civil Engineering, Indian Institute of Technology-Roorkee, Roorkee-247667, India.
2. Assistant Professor, Dept. of Civil Engineering, NIT-Raipur, Raipur-492010, India. E-mail: revacp@gmail.com
3. Research Engineer, Laboratoire de Biotechnologie de l’Environnement, Avenue des Etangs, Narbonne F-11100, France.