posted on 2018-02-12, 15:08authored byKalanithy Vairavamoorthy, J.M. Yan, Harshal Galgale, S. Mohan
The paper presents a GIS based spatial decision support system for modelling contaminant intrusion into water distribution
system. Three models have been developed to simulate the process and risk of contamination. A seepage model predicts
the contaminant zone of pollution sources and the change of concentration during migration through soil. A pipe condition
assessment model ranks the condition of water pipe in terms of the potential of contaminant ingress. An ingress model
combines the geometry algorithm with contaminant zone to obtain the potential pollution areas of water distribution pipe.
The three models were integrated with ArcView GIS for supporting decision making for risk mitigation. Zone VIII of water
supply system in Guntur, India was selected for the case study. The contaminant ingress potential and potential pollution
area of water pipes were displayed as thematic maps in GIS. The areas resulting in high risk were identified from the GIS
maps. The availability of resources for maintenance activities are limited in developing countries. Thus GIS based spatial
decision support system helps to achieve maximum risk reduction.
History
School
Architecture, Building and Civil Engineering
Research Unit
Water, Engineering and Development Centre (WEDC)
Published in
WEDC Conference
Citation
VAIRAVAMOORTHY, K. ... et al, 2004. A GIS based spatial decision support system for modelling contaminant intrusion into water distribution systems. IN: Godfrey, S. (ed). People-centred approaches to water and environmental sanitation: Proceedings of the 30th WEDC International Conference, Vientiane, Laos, 25-29 October 2004, pp. 513-520.
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