Taking Hydraulic Models for a Test Drive - Side by Side Comparison.
Hydraulic modelling is often a very important part of the sewer system analysis process and the simulation results are used for planning, design, or operational purposes. Several numerical models are currently available to engineers, but little data is available to allow direct comparison between their performance. This paper will provide some benchmark results for three numerical dynamic hydraulic models - SPIDA, EXTRAN, and RUNSTDY. Of these, only EXTRAN is non-proprietary; and RUNSTDY was developed and is marketed by the authors. The focus of this paper will be on the application of these models to large-scale urban sewer systems, and examples will be provided for two different sewerage systems. The comparison of performance will focus on measurable parameters such as speed of execution and accuracy of results. In addition to purely computational aspects of the models, issues related to the data management and ease of use will be addressed. Special emphasis will be placed on the analysis tools required for real-time control design and implementation.
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