ISIS by Halcrow - River modelling software Cost effective, integrated modelling solutions
ISIS by Halcrow > ISIS Free

ISIS Free

ISIS Free - River modelling softwareHalcrow have developed ISIS Free so that it offers an integrated 1D and 2D modelling software package. ISIS Free has all the same features as ISIS Professional and ISIS 2D which enable you to confidently apply it to smaller river modelling projects and to tackle different types of hydraulic conditions (i.e. flood risk assessments, flood mapping and design projects), and then seamlessly move to ISIS Professional or ISIS 2D should your project grow beyond the 250 1D nodes and 2,500 2D cells restriction.

ISIS free river modelling interface

ISIS Free/Professional interface

Key benefits of ISIS Free

  • it’s FREE
  • install it on as many computers as you like as its use is not limited
  • undertake both steady and unsteady calculations
  • use ISIS Mapper to build hydraulic models, analysis results, and visualise model outputs
  • use the full range of structure (including logical rules)
  • full use of hydrology units (including FEH, ReFH, USSCS)
  • model floodplain flows through either 1D or 2D flow simulations
  • seamlessly upgrade to ISIS Professional as a project grows

Users can sign up to an annual support and maintenance contract to gain direct access the ISIS support team and the ‘isisuser’ support community.

Should your project grow to need integrated 1D – 2D modelling, sediment transport modelling or water quality modelling then users can upgrade to ISIS Professional with the appropriate add-on modules.

Download ISIS Free

ISIS Free is a fully functional version of ISIS – ideal for undertaking smaller projects. Start using ISIS Free now.

Download the ISIS Quick Start Guide

The ISIS team have produced a Quick Start Guide which takes users through the basics of creating a model in ISIS. Download your copy now.

ISIS modules

ISIS 2D key features

  • ISIS Flow – one-dimensional open channel and culverted flow simulation engine with complex structures and operating rules.
  • Combined 1D and 2D full solution using ISIS-TUFLOW
  • ISIS Mapper - a GIS framework for buildings models, analysing results and visualising 1D and 2D modelling outputs
  • Hydrology module includes the UK standard and the revitalised FEH rainfall-runoff method and SCS CN method
  • Muskingum-Cunge flood routing module
  • Sediment transport and Water Quality modules
  • User-friendly interface enabling easy data entry and visualisation.
  • Map-based network visualiser
  • Detailed on-line help facility
  • Flood mapping links via ArcGIS or DeltaMapper

Interested in learning more

Contact Vijay Jain or Alastair Sheppard on +44(0)845 094 7990 or at for general information. For support contact us on +44(0)845 094 7994.

Your ISIS feedback

Halcrow is continuously developing ISIS and we would like your feedback to target areas for improvement. Email isis@halcrow.com with your comments.

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