In his PhD studies of civil engineering - economics at Graz University of Technology Dr. Koelbl delved into the topics of benchmarking and water loss management. In 2009 he completed his PhD thesis with the title

‘Process Benchmarking in Water Supply Sector: Management of Physical Water Losses‘

Advisor:             Univ.-Prof. DDipl.-Ing. Dr.techn. Dr.h.c. Harald KAINZ

Co-Advisor:       Univ. Prof. DI Dr. nat. techn. Raimund HABERL

For his PhD-thesis, he received the following awards:

1. ‣The OVGW (Austrian Association for Gas & Water) award for 2010 Studies
   

2. ‣The 2009 Scientific Sponsorship Award from Municipal Department 22 - Environmental Protection in Vienna (MA 22)