AWWA ACE68671

The focus of this powerpoint presentation is on a distribution system piping network, including the following: the type and level of detail needed in the hydraulic model, and impact of the hydraulic model structure on model maintenance efforts; attributes and topology features, and data update procedures that should be included in the GIS to allow cost-effective coordination with hydraulic modeling; and, tools that are available to perform cost-effective updates. Three examples are provided and include the following: Example 1 - Skeletonized Model 2008 update of 2001 model (AutoCad Base); Example 2 - Reduced/Skeletonized Model 2008 Update of 2005 Model (GIS Base); and, Example 3 - All-pipes Model GIS with Geometric Network. Presentation recommendations and conclusions include the following: develop geometric network and implement topology rules into GIS; establish a process whereby errors identified during the modeling process are reported back to, and corrected, in the GIS; include a date stamp in GIS for latest edit/entry; existing off-the-shelf modeling software maintenance tools can yield powerful, cost effective model maintenance strategies; and, all-pipes models with one-to-one relationship to GIS are expected to best facilitate model maintenance.