Use of geospatial information system based tool for renovation and rehabilitation of water distribution systems

Abstract

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.

A Prioritization Model for Rehabilitation of Water Distribution Networks Using GIS

“…In the light of the fact that there are vast limitations for gathering data and statistics of breakage events in water networks, a proper structure should be considered for the empirical model of the breaks. Analysis of the breakage of pipes in accordance with the existing statistics and data indicates that breakage rate index is one of the most important indices for the assessment of the empirical models of pipe break (Tabesh and Abedini 2005;Tabesh et al 2010). Breakage Rate (BR) is the number of annual breaks per unit length of pipes.…”

“…Martínez-Rodríguez et al (2011) implemented a reliability and tolerance comparison in WDNs. Tabesh et al (2010) introduced a GIS based tool for the rehabilitation and replacement of pipes in WDNs. They developed combined EPANET and ArcView software in which several sub models were incorporated such as unaccounted for water, pipe breakage rate, hydraulic and quality performance indices.…”

An Integrated BIM–GIS Method for Planning of Water Distribution System

“…In [33], a hydraulic model using a GIS tool was developed to acquire information about the water pipeline network. Additionally, certain studies considered GIS to be a powerful data management tool for WDS [34,35], while others used a GIS model as a decision support system for the renovation of WDS [36][37][38]. In [39], a GIS tool was utilized to rank several potential pipeline routes.…”

Speciation and geospatial analysis of disinfection byproducts in urban drinking water

“…Therefore, the speciation of the trihalomethane mixture due to its health effects has a great importance to be assessed and evaluated in the drinking water supplies. Geographical information system (GIS) has been widely accepted as an efficient tool for the evaluation and visualization for the geospatial distribution of contaminants in air, water and soil, their management and mitigation (Tabesh et al 2010;Zerrouqi et al 2008;Karamouz et al 2006;Jerrett et al 2001;Briggs et al 1997). GIS can play a vital role for analysis and in formulating the quick mitigation plans for high-risk environments as envisaged in the present study.…”