Combined Hydraulic and Transient Models for the Toledo 78-in. Water Transmission Pipeline

This paper presents the results of hydraulic modeling and transient analysis for a raw water transmission system in Toledo, Ohio, utilizing a single model to perform both hydraulic and transient analyses. The project's objectives included evaluating alternatives for replacing or rehabilitating an aging, large-diameter raw water pipeline. Modeling efforts included system-head curve development, pipe diameter evaluation, transient analysis, and surge mitigation design. This paper explores the effectiveness of the modeling approach and provides insights into surge mitigation strategies and hydraulic considerations for the project. The work aims to serve as a guide for hydraulic modelers in the design and evaluation of water transmission pipelines.