Author Archives: Mike Reeves

About Mike Reeves

Mike has almost 20 years experience in urban drainage modelling both in consultancy and software support. He is now director of the technical services team at Innovyze and is responsible for support and training across a range of software products.

Worked examples of FHWA headloss type from HEC22

A new headloss equation, FHWA, has been implemented in InfoWorks ICM version 4. The attached paper supplements the on-line help and provides some worked examples and step by step guide to how the equations are implemented. The FWHA headloss type … Continue reading

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Modelling of Swales in InfoWorks ICM and CS

This video describes the modelling of swales within InfoWorks ICM and CS. A swale is essentially a ‘leaky’ conduit, in much the same way that a soakaway is a leaky manhole. The shape and dimensions of the conduit, are defined … Continue reading

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Modelling of Soakaways within InfoWorks ICM and CS

This short video describes the simple process of modelling soakaways. Soakaways are essentially a ‘leaky’ manhole, which allow water to be lost to the surrounding soil. The size of the soakaway is defined using the same chamber and shaft parameters … Continue reading

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Modelling of SUDs / BMPs / LIDs in InfoWorks ICM and CS (overview)

This short video provides an introduction to the modelling of these groups of structures within InfoWorks CS and ICM. The alternate names of SUDs / BMPs and LIDs are basically refering to the same family of structures, namely those such … Continue reading

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2D meshing – Avoiding small elements (and why this is so important)

When generating a 2D mesh in Innovyze products (such as InfoWorks ICM, CS 2D and InfoSWMM 2D) it is very important to avoid small mesh elements, as just one tiny element can increase simulation times by a factor of 10 … Continue reading

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Representation of Surcharging in 1D Open Channels in InfoWorks ICM and CS

There are a number of ways of representing open channels, such as conduits, channels and river reaches in ICM and conduits and rivers in CS. A similar principle applies to all these 1D structures in that the maximum water level … Continue reading

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Modelling Steeply Sloping Pressurised Pipes

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 … Continue reading

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Modelling of pressure pipes (including forcemains) in InfoWorks ICM and CS

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 … Continue reading

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A Guide to the ‘Stored’ Flood Type in InfoWorks CS and ICM

Although now superseded in terms of accuracy and complexity by 2D flooding, the stored flood type remains one of the most commonly used methods of representing flooding within InfoWorks CS and ICM. The principle is that in some situations, as … Continue reading

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The Three Things You Must Know About InfoWorks CS

Very quickly, here are three things which can catch out even the most experienced of modellers. 1. In the simulation parameters you must have the “initialisation: tolerance for volume balance” and “simulation: tolerance for volume balance” both set to 0.01. This … Continue reading

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