An Integrated Water Quality Security System for Emergency Response

Rakesh Bahadur1 and William Samuels2


This paper describes an integrated approach for water quality security that involves every component of a water supply system (raw water sources, intakes, treatment plants, pipeline network). The Integrated Water Quality Security System (IWQSS) consists of the following three components, which operate from the same platform, ArcView, a geographic information system developed by the Environmental Systems Research Institute (ESRI).


         RiverSpill (Samuels et al, 2001) tracks, in real-time, the fate and transport of contaminants in surface waters

         Water Treatment Process (WTP) simulates the water treatment process component by removing any contaminants as per the treatment processes.

         PipelineNet (Bahadur et al, 2001a, 2001b) tracks contaminants within the water distribution system (pipeline network). It can track both, end of pipe contaminants from the water treatment plant and contaminants introduced after water treatment.


The IWQSS allows the user to:


         Select a location on a river to introduce a chemical or biological contaminant

         Track the contaminant downstream, under real-time flow conditions, to an intake.

         Further track the contaminant to a water treatment plant.

         Simulate the effectiveness of water treatment processes on the contaminant

         Mode the transport of the contaminant through a water distribution system.

         Identify the overall population served by the plant and infrastructure impacted.


The integrated system can comprehensively study all the components of the water supply. The IWQSS can track contaminants introduced anywhere in the system:


         Upstream of the intake of a water supply system;

         At the water intake or the treatment plant;

         At a service reservoir;

         At a point in the distribution system;

         Individual house connection


For more information check the url at



1 SAIC, 1410 Springhill Road, McLean, Virginia, 22102, 703-288-6858

2 SAIC, 1410 Springhill Road, McLean, Virginia, 22102, 703-288-6860




Bahadur, R., Pickus, J., Amsutz, D, and Samuels, W., 2001a. A GIS-based Water Distribution

System for Salt Lake City, UT., Proceedings 21st Annual ESRI User Conference,

July 9-13, 2001, San Diego, CA.


Bahadur, R., Samuels, W.B. and Grayman, W., 2001b. EPANET-Arcview Integration for

Emergency Response, Proceedings World Water and Environmental Resources

Congress, ASCE, Orlando, FL, May 20-24, 2001


Samuels, W.B., Pickus, J., Amstutz, D, and Bahadur, R., 2001. Using Network Analyst to

Calculate Pollutant Travel Times, Proceedings 21st Annual ESRI User Conference,

July 9-13, 2001, San Diego, CA.