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Explore design options, record assumptions and prepare draft maintenance plans. Choose a tool by subject, then review its methods, sources and limits.

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Under development
For testing and feedback only.

Do not use these tools or their outputs on live projects until Slow the Flow explicitly confirms readiness. Source references and automated checks do not replace professional review. Tell us what needs improving.

SuDS

Sustainable drainage

Interception screening and site-specific management and maintenance planning.

Development preview

SuDS maintenance plan writer

Describe the site, assign responsibilities and register each drainage feature. Review its maintenance tasks, record site choices and export an editable draft.

  • 152 task rows across 14 CIRIA C753 maintenance tables
  • Word, task register CSV and JSON backup exports
Open the plan writer
Development preview

First 5 mm checklist

Assign contributing surfaces once, explore selected simplified interception routes and review the eligibility conditions against England’s national SuDS standards.

  • Feature register and area-accounting summary
  • Explicit assumptions, exclusions and source review
Open the checklist
NFM

Natural flood management

Early-stage estimates to explore how individual measures may affect an event.

Development preview

NFM design calculator

Enter hydraulic and design parameters for wetlands, leaky dams and other measures. Compare options with their units, assumptions and calculation methods in view.

  • Compare feature-level estimates side by side
  • Review percentage changes and model limitations
Open the NFM calculator

Help shape the next version

Tell us which task, condition or result needs more explanation. Use an invented example and leave out personal or confidential project information.

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