Smarter, faster drainage design with Causeway Flow.

Advanced BIM and Civil 3D integration

Networks can be exported as Civil 3D entities containing full hydraulic and construction details — including material, bedding, surround and trench information — providing a complete model for quantities, costs and reliable clash detection.

Linked drainage networks

After creating and exporting any drainage network to Flow, the optimised design can be seamlessly reimported to refresh and update all drawing outputs automatically.

Customisable annotation styles

Define annotation elements such as cover level, depth, diameter and invert level. Adjust prefixes, text size and layout to match CAD standards and project templates.

Surface creation and management

SmartSurface provides surface elevation data as spot levels and profiles to other applications in SmartTools range seamlessly working across multiple surfaces, including complex overlapping grade-separated surface.

Design coordination and feature alignment

SmartDesign lets you associate alignments, features and drainage elements together, so when levels or geometry change, connected features adjust automatically. This makes redesigns faster and keeps related assets consistent across the model.

Comprehensive rainfall and climate data inputs

Select rainfall methodologies including FSR, FEH99, FEH13 and FEH22. Apply climate change factors, urban creep and seasonal variations directly within the simulation setup.

Simulation parameter configuration
Specify return periods, climate change factors, additional area for urban creep and more.

Flexible storm duration selection

Run simulations across a full range of storm durations to identify the critical duration for design. Automate result generation for short- and long-duration rainfall events.

Simulation controls

Users can configure simulation settings to run extreme or consecutive rainfall events, control steady-state inclusion, and adjust drain-down time, added storage, and initial levels.

The hydraulic solver automatically maintains maximum precision and numerical stability, enabling seamless optimisation.

Customisable report setup

Select which data to include — from design settings and hydraulic results to manhole and pipeline schedules. Configure headings, units and layout before exporting to PDF or Excel.

Comprehensive design documentation

Automatically generate formatted reports containing network data, design parameters and simulation outputs. Ideal for submission to approving authorities or internal QA checks.

Report formatting and templates

Customise report headings, layout and branding. Save preferred configurations as templates to maintain consistency across projects and streamline future report generation.

3D network visualisation

The 3D button allows you to animate the drainage system in detail. You can see the water travelling through each structure as the analysis runs, with pipes, manholes and storage shown in true geometry.

Visualise hydraulic behaviour in real time

The 3D view, longsection and hydrograph all update together, so you can move forward or rewind to see what’s happening in the network at any moment — depth, flow direction and surcharge levels are all linked in real time.