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Flood Modeller Pro delivers a fully integrated flood modelling experience. With a legacy stretching back 40 years, it allows users to model rivers, floodplains and urban areas, using our powerful 1D and 2D solvers. Its user-friendly interface and wide range of productivity tools enable you to build and run models quicker and more intuitively than ever before.

The brilliant essentials of Flood Modeller Pro include a user-friendly interface, superior workflows and robust model simulations for everyday use - all available at no cost in Flood Modeller Free.

Life simplified

The brilliant essentials of Flood Modeller Pro include a user-friendly interface, superior workflows and robust model simulations for everyday use - all available at no cost within Flood Modeller Free.

All of the key features that users have come to love and rely on in previous releases are retained.

Better than ever

All of the key functionality that users have come to rely on in previous releases is retained. It adds innovative features, greater flexibility and new productivity tools - all designed around user needs.

The Flood Modeller interface

Visually stunning

An intuitive environment for building, running and analysing flood models, with support for multi-screen working and web mapping services – all intended to make your work more enjoyable.

Model river channels, floodplains and urban areas at the right level of detail, using our powerful 1D and 2D solvers or our unique rapid inundation solver.

1D solver

Developed for 40 years, our 1D solver has become one of the fastest and most robust solutions available, making it an ideal choice for flood modelling applications.

The 1D steady and unsteady state solvers provide a comprehensive range of methods for simulating flows and water levels and can be confidently applied to a range of applications.

2D ADI solver

The ADI solver has been developed for fluvial, overland, estuarine and coastal modelling problems where the flow is not rapidly changing.

It is quick, accurate and robust, and is based on the long-established depth integrated velocities and solute transport (DIVAST) numerical engine which was first developed in the 1980s.

2D TVD solver

The TVD solver has been developed specifically to provide accurate representation of two-dimensional ‘shocks’ (rapid changes in water surface profile).

This solver allows complex hydraulics to be calculated more accurately and provides increased stability as TVD simulations are less prone to numerical oscillations than other solvers.

2D FAST solver

The FAST solver has been developed to enable rapid assessments of flooding. It provides results up to 1,000 times quicker than traditional 2D solvers.

Providing results in seconds or minutes, as opposed to hours or days, different types of flooding can be rapidly screened, considerably reducing the cost and time spent modelling.

Dynamic linking

The industry-leading 1D and 2D solvers within Flood Modeller Pro are designed to work alone or together, enabling dynamic interaction between 1D and 2D models.

These solvers can also be linked to third-party software, including BMT WBM's TUFLOW (including ESTRY) and US EPA SWMM, or to other OpenMI compliant software.

Flood Modeller Pro has been applied extensively to complex flood risk management studies across the globe.

Visualising flood depths and velocities in the Marikina, Philippines

Flood modelling

Develop urban, fluvial, coastal and storm water models to understand the accurate prediction of flood water levels, flow paths, velocities and inundation extents.

Lowestoft Estuary Inception Modelling Study, England

Flood mapping

Flood Modeller Pro seamlessly integrates every stage of the flood mapping process, from model building to post-processing, visualisation and sharing flood maps.

Flood mapping, England

Flood forecasting

Flood Modeller Pro can be used as part of a flood forecasting system to enable effective action to prevent or reduce the impacts of flooding.

The 2D FAST solver was used to provide a rapid assessment of potential locations where pluvial flooding may occur

Hydrological analysis

Hydrological analysis using Flood Modeller Pro provides a key step in integrated sustainable model solutions in a wide range of flood and water security studies.

Military helicopter was used to bring in material to shore-up a breach at Greatham, England

Embankment failure

Failure or overtopping of existing structures is set to become an even greater challenge due to changing climate impacts. Our solvers ensure that you can model this hazard and determine the risk.

Dam breach

Dam breach analysis

Flood Modeller Pro can analyse the outflow from a breach and identify the routing downstream, allowing the potential flood risk to be accurately understood.

Broadland Flood Alleviation Scheme

Options appraisal

Flood Modeller Pro enables you to assess the various flood mitigation options available, allowing you to analyse the costs and benefits of each one.

Cotswold Canal Modelling, England

Detailed design

Flood Modeller Pro can be used for the detailed design of remedial works or for planning emergency response.

Flood Modeller Pro is a modular solution providing an extensive range of innovative features. Upgrade your software as and when your project evolves.

Hydraulic structures

Include hydraulic structures in both 1D and 2D models. The calculation of level and discharge relationships are fully automated by the software. Structures with automatic operation incorporate logical control rules.

Hydrological boundaries

Incorporating a range of embedded tools for modelling hydrological events, it can model both short- and long-term hydrological events, direct rainfall, evaporation and infiltration, as well as water demands and abstractions.

Open file system

Built on an open file system, you can integrate Flood Modeller Pro with your own workflows. It enables users to view and edit model data files and integrate custom tools quickly and efficiently.


Intuitive user interface

Incorporating a user-friendly interface that delivers an intuitive environment for building, running and analysing models. It offers superior workflows and support for multi-screen working.

OpenMI compliant

Flood Modeller Pro is OpenMI compliant, enabling the user to link CH2M's industry-leading flood modelling software with other OpenMI compliant software, such as USGS's MODFLOW model.

TUFLOW linking

A link allowing flow and water levels to be exchanged between Flood Modeller Pro and TUFLOW (including ESTRY), providing the user with greater flexibility in producing an integrated model.

EPA SWMM linking

Where pipe networks overflow in EPA SWMM, links to Flood Modeller Pro can be incorporated to model the resulting surface flows and possible flood scenarios.

Third party integration

The functionality of Flood Modeller Pro can be extended, and linkages to pre-existing models formed, by integrating with third-party software such as BMT WBM's TUFLOW, EPA SWMM and Deltares Delft-FEWS.

Visualise and analyse

A range of analysis and flood visualisation tools for spatial data are provided at no extra cost. Model results can also be visualised and shared with other stakeholders using Flood Viewer.

Unlimited solvers

Flood Modeller Pro provides 1,000 1D nodes and 400,000 2D cells as standard. If your model exceeds this functionality, you can upgrade your solvers to provide unlimited 1D nodes and/or 2D cells.

Multiple domains

Allows any number of 2D domains with different cell sizes to be built into a model. This is extremely useful when a model incorporates urbanised and rural floodplains which require varying levels of detail.

1D sediment transport

Predict the sediment transport rates and patterns of erosion/deposition in river channels or to study sedimentation problems for both uniform and graded sediments. 

1D water quality

Simulate advection / diffusion of conservative and decaying pollutants, water temperature, cohesive sediment transport, interaction of quality determinands with sediments, phytoplankton and pH.

Enhanced multi-run

With advancements in technology and processing power, users can take advantage of batch processing models by increasing the number of concurrent instances from four to eight.

Flood Modeller Free

All the great features of Flood Modeller Pro are also available at no cost for smaller modelling projects in Flood Modeller Free, limited to 250 1D nodes or 100,000 2D cells; across all three 2D solvers.

My Flood Modeller

Flood Modeller Pro integrates My Flood Modeller with your desktop software, making it easier than ever to stay connected to the user community and our technical support team.

Harness the full potential of CH2M's flood modelling software. Utilise the modelling Toolbox within Flood Modeller Pro to streamline your projects.

Mapping All Sources

The Mapping All Sources Tool (MAST) allows users to quantify combined flood risk using flood maps from a number of sources or different probabilities of flooding. The outputs can also be used to inform whether more local modelling is required for areas of high risk or high uncertainty.

Layer converter

The layer converter improves modelling efficiency by allowing users to take advantage of different datasets. It converts existing GIS datasets (shapefiles or grids) into different formats, including grid shapefiles, outline shapefiles, Google Earth files or alternative grid types.

TIN creator

The TIN creator is designed to generate and edit interpolated triangular network surfaces, used to transform 1D hydraulic model results into 2D flood extents. It can triangulate any complex surface containing polygons, holes, polylines and points.

Damage calculator

The damage calculator uses grid and property data to ascertain flood depths at each property location, and combines these data with the associated depth-damage curves to calculate the damages to properties in your study area.


UMap estimates the uncertainty of a flood outline location and allows the user to specify datasets to preload automatically. It transforms water levels into a horizontal uncertainty in the flood outline location, taking into account the water level uncertainty and the floodplain topography.

3D viewer

The 3D viewer is designed for simple visualisation and animation of flood mapping data in three dimensions, enabling you to superimpose a water surface on a loaded ground grid layer.

Results extractor

The 1D Model Result Extractor extracts model results across different return periods, storm durations and model runs. Checks are carried out to ensure that the results are valid which are then pre-formatted for report tables with additional data drawn from the model.

Health checker

The health checker removes common modelling errors and assists in making models run faster, and with better convergence. It also incorporates some automatic and user assisted error fixing which allows the user to solve common modelling problems.

Automatic interpolator

It enables the user to specify a maximum spacing between cross-sections and apply interpolate units, where necessary, to the model or selected reach(es). The is appropriate where for stability purposes, finer resolution of the watercourse is required and survey data not available.

Calibration file editor

This tool removes the manual process of having to create calibration text files from specified data. As well as prevention of mistakes, it improves the efficiency of the user, and allows modelled and observed quantities to be easily compared for calibration and verification purposes.

Conveyance plotter

The conveyance plotter displays the calculated channel conveyance against stage for a river section unit, either on a cross-section plot or on its own. This provides the modeller with a quick reference to check that conveyance increases monotonically and smoothly with stage.

1D flood calculator

Flood Modeller Pro’s 1D flood calculator tool provides an easy method for quickly converting your 1D model outputs into a variety of standard GIS formats, enabling the impacts from your modelled data to be visualised and interpreted on a map.

Represent flood information in an interactive way, enabling better decision making and more effective engagement with key stakeholders.

Integrated with Flood Modeller Pro, Flood Viewer enables the viewing of different flood scenarios. It provides a user-friendly interface designed to be intuitive enough for non-technical users to get to grips with quickly, and robust enough to be used for decision making in emergency situations. An interactive slider allows you to quickly fade between different flood extents.

Low water levels for Telford, UK represented within Flood Viewer

Low water level

Medium water levels for Telford, UK represented within Flood Viewer

Medium water level

High water levels for Telford, UK represented within Flood Viewer

High water level

Customer success stories

Training in Flood Modeller Pro

Our training courses cover various areas including the theory and practice of hydrology, hydraulics and the use of GIS. They have been developed to provide cost-effective and well-structured training that is flexible and tailored to clients' specific needs.

Introduction to Flood Modeller Pro

A two day course providing an introduction to 1D and 2D modelling. It guides attendees through the building, running and reviewing of their own 1D and 2D models.

Advanced Flood Modeller Pro

A two day advanced training course focusing on 2D modelling as well as covering a number of advanced 1D modelling techniques available in Flood Modeller.

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