So far, the Dept. of Hydraulic & Environmental Eng. of the Faculty has had a successful cooperation with Technical University of Hamburg – Harburg (TUHH), University of Exeter, Imperial College London, Technical universities of Athens, Bucharest, Ljubljana, etc. Other departments of the Faculty have also made contacts with numerous universities abroad. Presently, contacts with Montenegro and Macedonia are sporadic, while the staff takes part in teaching at the University of Banja Luka (Bosnia and Herzegovina). Within Serbia, the Faculty has close relations with all other Faculties of Civil Engineering (Novi Sad, Nis, Subotica, Kosovska Mitrovica). The Dept. of Hydraulic & Env. Eng. takes part in COST action http://www.cost.esf.org/ , and has a joint EU project “Educate!” http://www.water-msc.org/ . From COST cooperation, a very successful contacts between scientists have been achieved, and as a result, an international state-of-the-art book has been published (“Advances in Urban Flood Management”, Taylor&Francis / Balkema, London (стр. 39, ISBN 0415436621, 2007), while from the Educate! project, one generation of students from 4 countries has successfully completed their master studies, and the second generation has enrolled. On academic level, cooperation is possible on a suitable research topic, both experimental and numerical. The expected deliverables will be international journal or conference papers, specialist diploma, master thesis, or doctoral dissertation, depending on candidate, his/her background, and period of cooperation. On the industrial (commercial) level, cooperation can be in providing (lending) laboratory facilities, building scale models, chemical analysis of water, and all levels of engineering design projects and feasibility studies.