InfoWorks supports the use of a TIN (triangular irregular network) ground model to represent the ground surface in the area covered by your model. Ground models provide a three dimensional view of the ground terrain. They require three pieces of information:
Ground Model Components
A very basic ground model can be created using the X, Y and ground levels from manholes. More accurate data can be sourced from Light Detection and Ranging (LIDAR) survey data. Continue reading
There are several reasons why you might get a message that says the software is unable to obtain an ArcEngine Licence, when you try to open a network with the map control set to ArcObjects or ArcEngine.
These include:
H2OMAP Water, InfoWater and H2ONET all offer the “Hydrant Curve” simulation type. This type of simulation allows you to choose any junction in any scenario at any single time step and develop a hydrant curve to indicate the fire flow residual pressures at a range of flows.
Fig. 1. Graph result from a hydrant curve simulation
Nodes with no demand at the timestep of interest: When comparing the pressure (at the same junction, time step and scenario) between the EPS simulation result and the hydrant curve simulation result, you will find that the first data point (Available Flow = 0) of the hydrant curve will have the same residual pressure as the junction pressure reported in the EPS simulation results.
Nodes with positive demand at the timestep of interest: In contrast to the above, you will find that at the first data point of the curve (Available Flow = 0), you residual pressure will be higher than the junction pressure reported in the EPS simulation results.
2013 Australian Collection Systems User Group
On Wednesday 17th April Innovyze’s Australian Collection Systems Modelling User Group was held in Melbourne.
40 delegates from around Australia attended a day filled with case studies, technology previews, software Tips and Tricks as well as a special presentation by Janice Green from the Australian Bureau of Meteorology.
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.
Waste Water and Trade flow in Infoworks (click to download)
This technical note shows how to apply trade and population foul flows in Infoworks ICM and InfoWorks CS.
A Wastewater Event describes the daily pattern of domestic waste from one or more subcatchment populations. A Trade Waste Event describes the daily pattern of trade waste from one or more industrial sources. The daily patterns can be refined further with daily or weekday and weekend settings and a monthly adjustment. Wastewater and trade events can each contain one or more profiles. Each profile describes the pattern of domestic waste or trade waste for one or more subcatchments.
Applying Trade and Population Foul Flows in InfoWorks
Applying New Features for IWLive 3.5 (click to download)
With the February release of the software IWLive has seen several new features but most noticeably a large collection of new compatible Innovyze products.
Below is a list of the new modules and features respectively.
The aim of this document is to outline the ways in which users can make use of the new functionality within IWLive. Please note that the new products each have their own particular setup requirements, these can be discussed in further detail separate to this post. Here we will focus on the new features and the integration of these only.
Each of the features mentioned above will be explained and where possible examples of implementation are provided for guidance.
Sending InfoWorks ICM and CS data to another user (click to download)
Both InfoWorks ICM and CS operate as databases, with links to other files for information such as ground models and simulation results. It is often necessary to save part of a database and the associated data to send to another user whether it be for archiving, submission to a client or when seeking advice from the Innovyze support team.
This document describes how to create a transportable database (or compact transportable database for CS), which has been designed specifically for this activity.
You can control the pumps in InfoSewer and H2OMap Sewer by using a Pump Control which will control the pump or pumps in your network based on:
If you use a By Inflow control the pump speed of the pump is increased or decreased to make the Upstream Wet Well Level Constant (Figure 1) for an exponential 3 point curve
Figure 1. Inflow Control for PUMP in InfoSewer and H2OMAP Sewer will change the Pump Speed of the pump to make the Wet Well level constant
Modelling Steeply Sloping Pressurised Pipes (click to open technical note)
A previous technical note covered the modelling of pressurised pipes within InfoWorks ICM and InfoWorks CS. This technical note provides a description of how to model pressurised pipes which slope (steeply) downhill.
In reality, it is possible that the top part of the pipe will be operating under free surface flow, whereas the lower portion will be heavily surcharged due to backing up from downstream. There is no ideal way to model this configuration, but the best approximation is to model the entire pipe as ‘forcemain’ and to ensure that it is pressurised throughout the simulation.
Modelling of Pressurised Pipes within InfoWorks ICM and CS (click to download technical note)
Correctly modelling pressurised pipes, variously described as forcemains or rising mains, can be one of the more difficult aspects of the model build process.
The fundamental problem is that no equations have yet been developed which adequately represent the transition from free surface flow, such as exists in open channel or pipes which are not completely full, to pressurised flow which exists in pipes which are completely full. Pressurised flow can exist either intermittently, for example in storm pipes which become surcharged during rainfall, or permanently, for example in pumped systems or siphons.
Pipes which are predominantly free surface and only rarely surcharged are modelled using the Preissmann Slot approximation. This uses a narrow slot, which runs the length of the conduit and extends vertically up to infinity. The width of this slot can be edited, but by default is 2% of the pipe width.
The Preissmann slot allows a free surface to be maintained and therefore a transition does not occur. The slot makes pipes slightly larger than in reality. This is usually compensated for by the base flow depth, which makes the pipes slightly smaller and by manually decreasing the size of the manholes, using the storage compensation feature, so that the correct volume of the below ground system is represented.
The Preissmann slot is not recommended in pipes which are permanently or very heavily surcharged (i.e. highly pressurised).Therefore a dedicated pressurised pipe model must be used, which does not include the Preissmann Slot or base flow, approximations. There are two options for doing this, the ‘Pressure’ or ‘ForceMain’ solution models, both specified as part of the conduit information.
Modelling of Pressurised Pipes within InfoWorks ICM and CS
