טכניון מכון טכנולוגי לישראל
הטכניון מכון טכנולוגי לישראל - בית הספר ללימודי מוסמכים  
Ph.D Thesis
Ph.D StudentPreis Amitzur
SubjectWater Distribution Systems Security - Multi-Objective
Management
DepartmentDepartment of Civil and Environmental Engineering
Supervisor Professor Avi Ostfeld
Full Thesis textFull thesis text - English Version


Abstract

Drinking water utilities in Israel and around the world are vulnerable to various types of terrorist attacks including warfare contamination and bioterrorism. A water distribution system is comprised of water tanks, pipes, pumps, and other components that deliver treated water from treatment plants to consumers. Particularly among large utilities, distribution systems may contain thousands of kilometers of pipes and numerous delivery points, which can be highly vulnerable to a terrorist deliberate contamination injection. Near real-time monitoring technologies were cited as critical to helping drinking water systems detect and respond quickly to threats related to terrorist water contamination; to minimize the impact of any such contamination by facilitating a quick response; and to help in restoring systems after an event. This research addresses the water networks security threat by developing methodologies for: (1) The design of sensors network for water distribution systems security taking into account conflicting objectives (e.g., maximizing the detection likelihood; minimizing the detection time; and maximizing the reliability of detection) using a multi-objective search technique. (2) The characterization of the sources of pollution once a contaminant has been detected by the sensors network using data driven model and evolutionary search techniques. And (3) the operational response actions for the containment of pollutant which will guide subsequent system cleaning/ flushing. The developed models, presented in this dissertation, extend the current research knowledge in water networks security and overcome several limitations of previous methodologies presented in the relevant research literature. The models are demonstrated through successive base runs and sensitivity analyses using "benchmark" water distribution systems example applications - known in the research literature as representative water networks for testing and evaluating new design or operation procedures.