Thesis (Ph.D.) - Cairo University - Faculty of Engineering - Department of Civil Engineering

This study aims to identify risks encountered by Domestic Wastewater Treatment (DWWT) and Seawater Desalination (SWD) PPPs in Egypt and develop a preferred risk allocation scheme as well as risk assessment models for such projects. A risk factors list was established through literature review and content analysis followed by experts{u2019} interviews. The top significant risks were then identified through statistical analysis. A preferred risk allocation scheme was developed using the 2majority opinion3 approach. The attributes affecting top significant risks were identified through Delphi interviews. Two Hierarchical Fuzzy Logic Models were developed for risk assessment of DWWT and SWD PPP projects, namely RA-DWWT-PPP and RA-SWD-PPP respectively. The developed models are formed of Mamdani fuzzy logic controllers, where fuzzy rules were generated automatically through fuzzy arithmetic and linguistic approximation. RA-DWWT-PPP model was evaluated via two case studies; New Cairo wastewater treatment plant (WWTP) and Abu Rawash WWTP, while RA-SWD-PPP model was verified by means of degeneracy testing

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