Questions After a Main Break

Water main breaks are prevalent in all cities. As engineers and planners, we do everything we can to avoid them and mitigate damages when they occur. Communicating those plans and educating the general public is another story. Having a clearly defined and defensible rehabilitation plan is the foundation for better education of stakeholders. They want to know:

Why did this water main fail? What was the likelihood of this water main to fail? Was there an assessment (financial, environment, and social) on this pipe failing? Was this pipeline planned to be repaired/upgraded in the near future?

Take a look at a sampling of news stories in the last few weeks regarding main breaks in the United State. Is your utility prepared?

Main Break News Clippings

Join Innovyze for a free webinar on Wednesday, September 17th, 2014 at 12:00pm US eastern time for a technology update for risk-driven asset planning solutions, and will discuss how utilities are utilizing these toolsets to better manage risk of failure and maximize the value of aging assets.

People who attend this webinar will be able to understand the following items regarding proactive asset planning practices (featuring InfoMaster*):
1. More accurately estimate lifetimes (remaining useful life) of pipes and failure potential
2. Systematically assess consequences of pipeline failures
3. Methods for proper budgeting including targeted approach to rehabilitation, repair and renewal planning.

Click here to reserve your spot. Spaces are limited.

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    InfoNet SQL: Overriding the Default Table – A Worked Example

    It is possible to override the default table by explicitly naming the table or tables in the clause. This is done by using the ‘SELECT FROM’ keyword e.g. if the default table is Pump Station and you want to select all pipes with width greater than 100 mm you should say SELECT FROM Pipe WHERE width > 100.

    Overriding the Default Table

    Overriding the Default Table

    In the unlikely event that you wish to select all pipes you can omit the keyword WHERE and the expression after it and simply say SELECT FROM Pipe. If the table name you wish to use contains spaces in it, it is necessary to put square brackets before and after the name e.g. SELECT FROM [All Links] WHERE width > 100. It is in fact possible to enclose any table name within square brackets so you can in fact say SELECT FROM [Pipe] WHERE width > 100.

    A Worked Example

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      2D Suspended Sediment Modelling in Infoworks ICM

      In version 5 of Infoworks ICM it is now possible to model suspended sediment transport within the 2D domain.  This uses the current advection-dispersion model which is already implemented in the 2D engine.  The 2D sediment functionality will also calculate Erosion-Deposition rates and update the bed level.  What follows is a description of the various 2D modelling options within Infoworks ICM.

      Erosion-Deposition Models

      Total load methods can be used to represent just suspended load or the combination of bed load and suspended load.

      The following Total Load Models are available:-

      • Ackers-White
      • Ackers-White revised
      • Engelund-Hansen
      • Westrich-Jurashek
      • Van Rijn
      • Velikanov

      The following Suspended load models are available (deterministic methods):-

      • Van Rijn
      • Zyserman and Fredsoe
      • Smith and MacLean

      Each of these models calculates the erosion-deposition balance near the bed. A maximum carrying capacity is worked out depending on the erosion-deposition model. Deposition occurs when the current sediment concentration exceeds the maximum carrying capacity, and erosion in the opposite situation.

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        Water Supply User Group 2014 (UK) Presentations

        On Wednesday 18th June Innovyze held a Water Supply User Group in Wallingford, UK. Innovyze wishes to thank all those who were involved in the conference and looks forward to future user group sessions.

        Click on an image below to download a PDF version of the presentations.

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          Drainage and Flood Modelling User Group 2014 (UK) Presentations

          On Wednesday 25th June Innovyze held a Drainage and Flood Modelling User Group in Wallingford, UK. Innovyze wishes to thank all those who were involved in the conference and looks forward to future user group meetings.

          Click on an image below to download a PDF version of the presentations.

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            How to Show All Associated Objects in a Grid in InfoNet

            Here’s a quick ‘tip & trick’ that was brought to my attention and I think it’s top, a top tip & trick, as it were.

            The navigate button doesn’t display the entire list of associated objects if these are too numerous, see below.

            Navigate Menu Doesn't Display All Associated Object if too Numerous.

            Navigate Menu Doesn’t Display All Associated Object if too Numerous.

            If you need to display these then you can create a grid of all the objects that are associated with your current object, use the menu option ‘Show All In Grid’, again accessed through the navigate button, see image below.

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              What’s New in InfoMaster 4.5 Update 3

              Allow multiple survey databases import

              InfoMaster now has the ability to batch import multiple PACP databases into one set of survey import. A new dialog box was introduced to allow users to select as many PACP databases as they wish.

              InfoMaster assumes all the selected PACP databases have the same schema and all databases will be imported use the same mapping settings.

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                Inline Banks in InfoWorks ICM

                The inline bank is a flexible link which can serve a number of purposes.  It can be used as 1D irregular weir connecting between two 1D nodes or it can be used to allow a 1D-2D Linear connection in an inline sense (as opposed to a lateral sense).  For example, the 1D-2D linear connection can be used to represent flow onto a 2D representation of a bridge deck, or allow flows from a channel represented in 1D to connect to a 2D representation (or vice versa) or represent the spill of flow into a 2D storage area.  The inline bank could also potentially be used to represent a linear gully connection into the drainage network.

                The inline bank is a linear feature, similar to the banklines, but allows the inline connection of between 2D and 1D based on the weir equation (shown in the help under the ‘River Reach-Bank Flows’ topic.  It is a very flexible piece of functionality both in a pipe network context and a river context as it will allow the transfer of flow between 1D and 2D, and vice versa, along a number of mesh elements.

                The first step is to set up a bankline.  This can be digitised using the New Objects tool.  The bank line essentially governs the connectivity between the 1D and 2D.  The bankline needs elevations, discharge coefficients and modular limits associated with it.  If required the elevations can be gathered from any open ground model by selecting the bankline and going to Model->Sample line elevations from ground model.

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                  Top Ten Advantages of InfoSWMM Over SWMM5 for Modelling

                  I have been working on the various versions of SWMM since 1980 when I was a co-author and co-developer of SWMM3, a co-author and co-developer of SWMM4 in 1988 and a co-developer of SWMM 5 from 2002/2006.   I have worked at Innovyze as a Product Sector Leader since 2008 and have grown to love the power and ability of InfoSWMM and all Innovyze software such as InfoWater, InfoWorks ICM, H2OMap SWMM and InfoSewer.  This blog post explains based on my experience why  InfoSWMM makes you a better modeler or modeller for the SWMM 5 engine rather than just directly using the SWMM 5 engine and GUI available from the USEPA.  I am still an almost daily user of SWMM 5 so I have a constant comparison between the ability of the InfoSWMM Modeling Platform over the SWMM 5 GUI.

                  Introduction to InfoSWMM

                  The basic layout and features of InfoSWMM as an Arc Map in Arc GIS

                  My Top Ten Reasons for preferring InfoSWMM over SWMM 5 based on my experience: These are the top ten reasons I have found over the last seven years for using InfoSWMM over the SWMM 5 GUI:

                  1.  Scenario, Database and Facility Managers, InfoSWMM allows you to have present and future scenarios and a facility manager so that it is easy to have active and inactive sections of your network, make smaller networks and simulate only portions of  your network for calibration or design.  Domain and Selection Sets for editing and output graphics.  Two hundred plus tools for Elevation Extraction, Pond Extraction, Data Inference, Data Connectivity etc. based on the proven technology and creativity from the past 18 years of InfoWater development.
                  2. The Tools of InfoSWMM and construction of InfoSWMM are based on almost 18 years of InfoWater Arc Map development; you are buying tools that have been proven across platform and modeling engines for many years.
                  3. Database editing of Network Elements and Output Files in either the Attribute Browser, DB Tables or the Output Report Manager Tables and Graphs. Continue reading
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                    InfoNet SQL – Using an Objects ‘Rank’ Field

                    The problem: Imagine you are interested in selecting and displaying in a table the node with the lowest ground level in your network. You might initially think that the following would work:

                    Erroneous SQL Syntax

                    Erroneous SQL Syntax

                    SELECT node_id, MIN(ground_level)

                    However what is displayed is an arbitrary node ID in the network and the lowest ground level value. This is simply how SQL works in any database. The syntax in the SELECT query simply asks for a list of node IDs and the minimum ground level. But since there is only one minimum ground level, the list of node IDs is condensed to just the one, and NOT the one corresponding to the minimum ground level.

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