Identification Of Contaminant Sources In A
Water-distribution System Using An
Optimization-simulation Method
Author(s)
J. Guan, M. M. Aral & M. L. Maslia
Abstract
Water quality in a water-distribution system is a health concern. When a
contaminant is released at an entry point, it rapidly spreads within the waterdistribution
system. The identification of contaminant source locations and their
release histories are data necessary for exposure analyses and security
assessment studies. This data can be characterized based on the measured
contaminant distribution data at selected monitoring locations. Topologic-based
methods are generally inefficient in assessing this problem. Here a new approach
is proposed to solve this problem. This approach is based on a water-distribution
system simulator and optimization analysis. EPANET is used to generate
simulated concentrations at selected monitoring locations by specifying release
histories of potential contaminant sources under known hydraulic operational
patterns. The optimization model is then used as a predictor to estimate the
release histories of these contaminant sources based on the similarity of response
between simulation and measured data at monitoring locations. This information
exchange can be developed as a closed-loop convergent algorithm. To test the
proposed algorithm, water-distribution systems serving the Dover Township, NJ,
area in 1962 and 1996 are used and findings are discussed.
Keywords: contaminant source, EPANET, monitoring locations, optimization,
reduced gradient method, release history, water-distribution system.
Keywords
contaminant source, EPANET, monitoring locations, optimization,
reduced gradient method, release history, water-distribution system.
Related Book
Other papers in this volume
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