title: Network hydraulics inclusion in water quality event detection using multiple sensor stations data.
abstract: Event detection is one of the current most challenging topics in water distribution systems analysis: how regular on-line hydraulic (e.g., pressure, flow) and water quality (e.g., pH, residual chlorine, turbidity) measurements at different network locations can be efficiently utilized to detect water quality contamination events. This study describes an integrated event detection model which combines multiple sensor stations data with network hydraulics. To date event detection modelling is likely limited to single sensor station location and dataset. Single sensor station models are detached from network hydraulics insights and as a result might be significantly exposed to false positive alarms. This work is aimed at decreasing this limitation through integrating local and spatial hydraulic data understanding into an event detection model. The spatial analysis complements the local event detection effort through discovering events with lower signatures by exploring the sensors mutual hydraulic influences. The unique contribution of this study is in incorporating hydraulic simulation information into the overall event detection process of spatially distributed sensors. The methodology is demonstrated on two example applications using base runs and sensitivity analyses. Results show a clear advantage of the suggested model over single-sensor event detection schemes.
authors.affiliation: Faculty of Civil and Environmental Engineering, Technion - Israel Institute of Technology, Haifa 32000, Israel.
authors.forename: Nurit
authors.initials: N
authors.lastname: Oliker
authors.affiliation: Faculty of Civil and Environmental Engineering, Technion - Israel Institute of Technology, Haifa 32000, Israel. Electronic address: ostfeld@tx.technion.ac.il.
authors.forename: Avi
authors.initials: A
authors.lastname: Ostfeld
mesh_terms: D000465:Algorithms; D002713:Chlorine / Q000032:analysis; D003198:Computer Simulation; D060766:Drinking Water / Q000032:analysis* / Q000592:standards; D004784:Environmental Monitoring / Q000379:methods* / Q000706:statistics & numerical data; D057446:Hydrodynamics; D006863:Hydrogen-Ion Concentration; D008962:Models, Theoretical; D014874:Water Pollutants, Chemical / Q000032:analysis*; D014877:Water Pollution, Chemical / Q000032:analysis* / Q000517:prevention & control; D060753:Water Quality / Q000592:standards; D014881:Water Supply / Q000592:standards
chemical_list: D060766:Drinking Water; D014874:Water Pollutants, Chemical; D002713:Chlorine
keywords: Event detection; Multiple sensors; Water distribution systems; Water security