Chapter
Apr 26, 2012
Distributed Network Fusion for Water Quality
Authors: Mark W. Koch [email protected] and Sean A. McKenna NM; [email protected]Author Affiliations
Publication: World Environmental and Water Resources Congress 2008: Ahupua'A
Abstract
To protect drinking water systems, a contamination warning system can use in-line sensors to detect accidental and deliberate contamination. Currently, detection of an incident occurs when data from a single station detects an anomaly. This paper considers the possibility of combining data from multiple locations to reduce false alarms and help determine the contaminant's injection source and time. If we consider the location and time of individual detections as points resulting from a random space-time point process, we can use Kulldorff's scan test to find statistically significant clusters of detections. Using EPANET, we simulate a contaminant moving through a water network and detect significant clusters of events. We show these significant clusters can distinguish true events from random false alarms and the clusters help identify the time and source of the contaminant. Fusion results show reduced errors with only 25% more sensors needed over a nonfusion approach.
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Copyright
© 2008 American Society of Civil Engineers.
History
Published online: Apr 26, 2012
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ASCE Technical Topics:
- Drinking water
- Engineering fundamentals
- Environmental engineering
- Equipment and machinery
- Errors (statistics)
- Mathematics
- Pollutants
- Pollution
- Probability
- Probe instruments
- Protective structures
- Statistics
- Structural engineering
- Structures (by type)
- Water (by type)
- Water and water resources
- Water management
- Water pollution
- Water quality
- Water treatment
Authors
Affiliations
Sandia National Laboratories, P.O. Box 5800, MS 1163, Sensor Exploitation Applications Department, Albuquerque, NM. E-mail: [email protected]
Sandia National Laboratories, P.O. Box 5800, MS 0735, Geohydrology Department, Albuquerque. E-mail: NM; [email protected]
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