GPU runtime results for 2D InfoWorks ICM models (2017 update)

This is the third instalment in a series of blogs I’ve written summarising run times for 2D simulations conducted on PC hardware and NVIDIA GPU cards. The first was in December 2012, I then followed up with a second in September 2016.

NVIDIA continue to evolve their GPU technology, producing faster and more powerful cards in rapid succession, often making it quite hard to keep up with the constant stream of new cards coming to the market! The other major change within the last 12-18 months has been a move away from physical hardware in preference to the adoption of Virtual (Cloud based) hardware platforms within corporate IT environments.

InfoWorks ICM is designed to leverage technological improvements as soon as new GPU cards and new hardware platforms come onto the market. The tables below show runtimes for two of our standard 2D testing models which were run on a high-end Workstation and a high-end physical Server equipped with two of the latest NVIDIA GPU cards, and a Cloud based system comprising of virtual Xeon processors and a virtual GPU card (NVIDIA GRID technology).

Each model was run on the three hardware platforms, which between them contained a TESLA K40c card, a Quadro M4000 card and an NVidia GRID K2 GPU card. Continue reading

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    Innovyze RDII Analyst 3.0 for the Analysis and Calibration of RDII, DWF, DWF Patterns and GWI in Sewer Collection Systems

    One of the most powerful InfoSWMM, InfoSWMM SA and H2OMAP SWMM Application Tools from Innovyze is RDII Analyst. RDII Analyst will separate out the Groundwater base flow, Dry Weather Flow (DWF), DWF Patterns, estimate the Wet Weather flow component or RDII Rainfall -Derived Infiltration Inflow (I&I) and use a Genetic Algorithm to find the best fit 18 RTK parameters for RDII modeling.

    This powerful tool can be used for RTK flow in InfoSWMM, H2OMAP SWMM, InfoSWMM SA, InfoSewer, SWMM 5 and InfoWorks ICM. Figure 1 shows one of the end results of RDII Analyst – a correlation plot of Observed versus Calibrated RDII Volume for the simulated events. New to 2017 is the ability to show all 3 R values, do scenario comparison of computed R, save and open many existing calibration runs and have 1 to 10 solutions per run.

    RDII Analyst is a significant improvement over the EPA SSOAP program, performs QA/QC of rainfall and flow monitoring data and decomposes the flow data into Dry-Weather Flow (DWF) and Wet-Weather Flow (RDII) components using criteria such as rainfall threshold. The DWF component is further analyzed to construct a DWF pattern that can be used to simulate the collection system using InfoSWMM. The DWF pattern is then assigned to the source nodes that contribute DWF to the meter location in proportion to sewershed areas or based on other criteria. The RDII component is then analyzed to determine RDII events and to calibrate parameters of the RTK synthetic unit hydrograph so that the RDII flow simulated by the RTK method closely matches the RDII flow obtained by the decomposition process. The RTK unit hydrograph parameters are calibrated with genetic algorithm optimization. The calibrated RTK parameters and the DWF patterns are then passed to InfoSWMM to carry out detailed dynamic flow routing through the sewer system and evaluate system response to support the development of an optimal capital improvement program. You can read the World Environmental and Water Resources Congress paper by Misgana and Boulos (2008) with a complete description and validation of the RDII Analyst workflow process for both RDII Analyst and for the InfoSWMM Calibrator Add-On in the InfoSWMM Suite (Boulos, 2005)

    Figure 1. Correlation plot of Observed versus Calibrated RDII Volume for the simulated events.

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      Confused about WHILE, IF

      Clients often get confused about WHILE, IF etc. It is quite common for those unfamiliar with SQL often try to use IF/ELSE/WHILE when there is no need and normal SQL commands are more appropriate.

      The important thing is to understand is that they can only be used to control the overall flow of the SQL query, they cannot be used to make decisions for individual objects.

      So for example, when you write

      SET user_number_1 = 5

      That query is automatically applied to all objects of the specified type. Continue reading

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        Exporting results to binary files

        InfoWorks ICM allows you to export results in various formats. Amongst all the options available you can export results to binary files. Have you considered using this format? Continue reading this blog post to find more details about this.

        What is a binary file?

        A binary file stores data in binary format which can be read by computers but is not readable by users. It is usually more efficient than other formats, because their size is generally much smaller and their input and output is much faster.

        Why do we want a more efficient file format?

        We want a more efficient file format to be more efficient! This is particularly important if gigabytes of results are being generate and analysed. For example, the Stochastic Flood Maps presented in this blog post required the analysis of runs with 200 simulations, each of them with more than 10 000 2D elements, which ends in the generation and analysing of 1.2 GB of results for each run. Under these circumstances, the size of results files exported and the time required for their analysis can be significantly reduced with the use of binary files.

        This does not mean the binary format should always be used. The use of binary files require the development of third party applications to read them, which might not be convenient for common modelling tasks that do not involve much data. In this case, the use of other formats, such as csv files, can be much handier to use and easier to read and analyse. In addition, InfoWorks ICM has several tools that can be used for most modelling tasks, including displaying and analysing results. Continue reading

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          Introduction to InfoWater SA

          InfoWater SA not only provides almost all capabilities of InfoWater as a hydraulic modeling tool for drinking water systems, but also offers an outstanding interface for better user-experience.

          InfoWater SA is a Stand Alone software package, which was not built upon on ESRI’s ArcMap as InfoWater. Its map functionalities are based on ESRI’s ArcEngine, but there is no additional cost for users.

          InfoWater SA utilizes the Microsoft Office style ribbon, which separates functionalities into groups such as Edit, View, Data, Tools, and Application etc. The ribbon has differentiated icons and labels according to their importance and frequency of use. Users can hide the ribbon to open up space the network map.

          InfoWater SA also supports the Quick Access toolbar, which is fully customizable and can be placed on top or below the ribbon. A user can add any icons and commands to the Quick Access toolbar according to his/her preferences.

          InfoWater SA User Interface

          InfoWater SA User Interface

          For more information, please visit or contact our friendly Innovyze staff in your region.

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            Moving InfoWorks RS Network Data to InfoWorks ICM

            InfoWorks ICM has the ability to model both urban drainage systems and fluvial systems in an integrated manner. In the past, urban drainage systems would have been modelled in InfoWorks CS and the migration of data from InfoWorks CS to ICM is well documented ( with virtually all data migrated between the 2 software. This is because InfoWorks ICM has its roots in InfoWorks CS.

            This is not the case on the fluvial side, where models exist in our river modelling software, InfoWorks RS.  The setup of InfoWorks ICM and InfoWorks RS are a little more distinctive.  Most fluvial modelling software use cross-sections and links but they differ in the ways they represent structures and junctions, InfoWorks RS and ICM are no exception to this. Nonetheless it is still possible to migrate network data between InfoWorks RS and ICM with some ease, avoiding the time-consuming re-creation of the entire fluvial model network.  Although it should be noted there are some incompatible network objects that exists in InfoWorks RS, these are primarily Routing reaches, Bernoulli Loss Units, Flapped Orifices, Blockage Units and Symmetrical conduits.  There are also no junction nodes (although these can be represented in InfoWorks ICM as break nodes) or connectivity links.  This means that some of the connectivity requires fixing within InfoWorks ICM.  There are also differences in the approach to modelling bridges which is identified later in this article.

            The first thing to note, is that with an InfoWorks ICM license, it is possible to open the InfoWorks RS viewer software which allows the user to open, view and export InfoWorks RS model networks.  With the InfoWorks RS network open, Right click on the Network with IWRS and click on Export->to CSV… Export the RS Network to CSV with the following options checked:

            Figure 1: Export options for InfoWorks RS CSV Export to ICM

            Continue reading

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              What elements can subcatchments “drain to” in InfoWorks ICM?

              Have you wonder where subcatchments can “drain to” in InfoWorks ICM? Probably you are thinking nodes, but the correct answer is more complex giving the flexibility InfoWorks ICM offers you. Let’s have a look:

              • Nodes: subcatchments can drain to any node type, except outfalls. For example, subcatchments can discharge runoff to a manhole in sewer systems or to break nodes in river reaches. If manholes have flood type “Inlet” or “Gully”, subcatchments with a system type of ‘storm’, ‘combined’ or ‘overland’ drain to the above ground elements and are subject to the inlet parameters before they can enter the below ground element, whereas subcatchments with ‘foul’, ‘sanitary’ or ‘other’ system types drain directly to the below ground element.
              • Links: subcatchments can drain to any link. For conduits, river reaches, channels and bridges the runoff from subcatchments is applied as lateral inflow. For control links, the runoff is applied to the upstream node. If this node is an outfall, the downstream node is selected to drain to, and if both nodes are outfalls the runoff is lost.
              • Multiple Links: similar conditions to links, but in this case subcatchments drain to several links according to a weight factor. The weight factor can be user-defined or dependent on the link length.
              • Subcatchments: subcatchments can drain to another subcatchment and the runoff generated by the first one is added to the rainfall of the destination one. The runoff is then subject to the initial loss, volume, and routing models of the surfaces of the destination subcatchment.
              • 2D zone: subcatchments can also drain to 2D zones if they discharge to a dummy 2D manhole node. A 2D manhole with small volume can be defined as dummy node to make the connection between the subcatchments in the 1D model with the 2D zone in the 2D model. The dummy node needs to be connected to a link, which can be a flap valve in the opposite direction.

              Continue reading

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                Open Data Export Centre – Exporting the Attachments Array

                InfoNet has the ability to attach an unlimited number of attachments to any of its objects, which are managed through the attachments array (see image below). This post explains how to export the attachments array information using the Open Data Export Centre.

                Attachments Array

                Attachments Array

                In the Open Data Export Centre it is necessary to map the attachments fields into the output file, see images below. Continue reading

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                  Basic Tutorial Now Available in InfoWorks ICM

                  Good news! InfoWorks ICM (version 7.5.2 and newer) now has a built in tutorial to cover all major functions of the software. To access this helpful tool, just open the Help file, click on the ‘Contents’ tab, and you will find the Basic Tutorial under the ‘InfoWorks ICM Tutorials’ section.
                  Once you locate the tutorial in the Help, you will need to download the corresponding data that will help you work through the tutorial. To retrieve that data, please visit and choose InfoWorks ICM from the list of products and login. If you do not know your username and password, please email to ask for your credentials so that the support team can provide them to you. Once you are logged in, you will find the data for download: Continue reading

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                    Where subcatchments drains to?

                    In InfoWorks ICM you can extend model building functionalities with SQL and Ruby scripts. This blog is an example of how to define the nodes to which subcatchments drain using these tools. The scripts presented can be easily adapted to “drain to” links or subcatchments.

                    If you are modelling subcatchments that cover areas with one node only, you can use a simple SQL script. This is a common situation in urban drainage models, where subcatchments are usually delineated for each node. The SQL script simply sets the node to where the subcatchment drains to the node that it contains, as presented in the next figure.

                    Figure 1. SQL script to connect subcatchments with the overlay node.

                    Continue reading

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