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International Journal of Environment Science and Technology
Center for Environment and Energy Research and Studies (CEERS)
ISSN: 1735-1472 EISSN: 1735-1472
Vol. 7, No. 1, 2010, pp. 47-58
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Bioline Code: st10006
Full paper language: English
Document type: Research Article
Document available free of charge
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International Journal of Environment Science and Technology, Vol. 7, No. 1, 2010, pp. 47-58
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Use of geospatial information system based tool for renovation and rehabilitation of water distribution systems
Tabesh, M.; Delavar, M. R. & Delkhah, A.
Abstract
Normally, decision makers use number of pipe broken in specific sections of water distribution systems
to determine the pipes to be replaced. This index cannot solely evaluate hydraulic and quality parameters of the system
and effects of pipe renovation on the system performance. In this study, a methodology is presented to manage the
rehabilitation and replacement of water distribution network using hydraulic and geospatial information systems
models. A preprocessor subroutine is developed to link geospatial information systems and hydraulic software. Hydraulic
parameters together with the attribute data of pipes are used to determine the required renovation schemes based on
several criteria. The proposed indices consist of pipe breaks and leakage analyses, hydraulic and quality performance
and mechanical reliability of the network. A novel approach is also introduced to calculate leakage values throughout the
network. Results of a real case study by the developed model introduced replacement of 4 km 40 mm galvanized pipes
instead of 11 km 100 mm asbestos-cement pipes from conventional method. It is observed that the suggested geographic
information system based model produces more realistic results with less cost for renovation schemes in comparison
with conventional method which just consider number of bursts as a key criterion.
Keywords
Geospatial information systems; Hydraulic model; Leakage; Pressure; Quality; Rehabilitation; Reliability; Water distribution systems
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