Leveraging GIS & Hydraulic Modeling for Prioritizing Water and Sewer Renewal and Replacement
Abstract:Underground infrastructure is rapidly deteriorating and utilities are struggling to develop a rehabilitation and replacement program that addresses the most critical pipes in the system. Many capital improvement programs spend millions of dollars annually but, unfortunately, do little to lower total system risk because they are focused on infrastructure that may not be hydraulically significant to system operation.
Due to limited funding, it is essential that utilities review all available data and consider more than simply pipe age in determining which mains to repair or replace. By utilizing GIS data, water distribution models, and other available data sources, utilities can obtain a more complete estimation of the true likelihood and consequence of water main failure.
Likelihood of failure will be based on a variety of factors such as pipe age, material, soil type, and CCTV video. Consequence of failure requires a more detailed estimation of the hydraulic significance of each water main. This will determine the real impact of water main failure on critical facilities and ensuring adequate water service to customers. These scores can then be used to compile an overall risk score for each pipe.
Once a risk score is determined for each main, this is used to prioritize which mains require rehabilitation first versus others that may be able to wait until future years. The prioritized Rehabilitation Plan will ensure that utilities “get the most bang for the buck” and lower their total system risk as opposed to simply replacing older pipes first.
This presentation concentrates on utilities using advanced GIS and Hydraulic Modeling Applications that integrate hydraulic engineering simulations, comprehensive risk assessment and GIS spatial analysis. Techniques, tips, and requirements for these types of analyses will be presented along with a working example demonstrating how to perform a detailed Risk Assessment and develop a complete Rehabilitation Plan for a real water system.
Document Type: Research Article
Publication date: 2010-01-01
More about this publication?
- Proceedings of the Water Environment Federation is an archive of papers published in the proceedings of the annual Water Environment Federation® Technical Exhibition and Conference (WEFTEC® ) and specialty conferences held since the year 2000. These proceedings are not peer reviewed. A subscription to the Proceedings of the Water Environment Federation includes access to most papers presented at the annual WEF Technical Exhibition and Conference (WEFTEC) and other conferences held since 2000. Subscription access begins 12 months after the event and is valid for 12 months from month of purchase. A subscription to the Proceedings of the Water Environment Federation is included in Water Environment Federation (WEF) membership.
WEF Members: Sign in (right panel) with your IngentaConnect user name and password to receive complimentary access. Access begins 12 months after the conference or event
- Subscribe to this Title
- Membership Information
- About WEF Proceedings
- WEFTEC Conference Information
- Learn about the many other WEF member benefits and join today
- Ingenta Connect is not responsible for the content or availability of external websites