397099 - Generation of virtual WDS to complete cadastral information of existing systems
Thursday, June 7
8:30 AM - 10:00 AM
Location: Lakeshore C
Juliana Robles, Bogota, Colombia – Universidad de los Andes
Generation of virtual WDS to complete cadastral information of existing systems
Information related to Water Distribution Systems (WDS) in small and intermediate cities often may be incomplete or unreliable. This could lead to inaccurate network operation and maintenance, as well as it does not allow using calibrated hydraulic models to support future designs in the system. Data acquisition may be expensive and time consuming, thus it may be infeasible.
Therefore, virtual case studies are widely used by researchers around the world, including common benchmark networks as Hanoi and Two Loops, to validate new research. However, obtained results using these networks are case-specific and its application in other networks may induce errors.
Considering the high correlation that exists between city streets and public system infrastructure, a software was developed in the University of Innsbruck to generate virtual networks considering water source location, area of study, total water consumption and demand distribution. Geographic information collected with GPS devices is free and easy to acquire. Thus, street and avenues location will be used to generate real-based data, helping to complete cadastral information in existing systems.
This paper aims to evaluate this methodology by generating virtual networks for different cities in Colombia and then comparing resulting virtual WDS with the real systems, based on data obtained from water utilities. For both sets, network layout similarity and hydraulic factors as node pressure and flow rate were analyzed. Proposed methodology makes use of computational tools as EPANET to model extended period flow, WaterGEMS to skeletonize networks and ArcGIS for geo-referencing. Results of the comparison between real and virtual networks gives the possibility to conclude about the applicability of this virtual generation software in small cities or DMAs in large cities, its limitations and allow suggesting alternative solutions.