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    • Greenfield runoff rate estimation
    • Surface water storage volume estimation
    • Infiltration volume estimation
    • SuDS performance evaluation tool
    • Water quality assessment for SuDS developments (SuDS manual)
    • Water quality assessment for SuDS developments (WaND)
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  • Tools

    Here are our tools for the design and evaluation of SuDS

    • Tools
    • Greenfield runoff rate estimation
    • Surface water storage volume estimation
    • Infiltration volume estimation
    • SuDS performance evaluation tool
    • Water quality assessment for SuDS developments (SuDS manual)
    • Water quality assessment for SuDS developments (WaND)
  • Training & support

    We provide SuDS training courses and support for drainage consultants and local planning authorities.

    • Training & support
    • FAQs
    • Knowledge base
    • Training
    • Consultancy services
  • SuDS-iQ
  • About
  • Contact

How can I access the SuDS evaluation tool?

  • Read more about How can I access the SuDS evaluation tool?

What is the runoff coefficient for grass / vegetated area surfaces for the SuDS performance evaluation tool?

  • Read more about What is the runoff coefficient for grass / vegetated area surfaces for the SuDS performance evaluation tool?

What is the runoff coefficient for roof and paved surfaces for the SuDS performance evaluation tool?

  • Read more about What is the runoff coefficient for roof and paved surfaces for the SuDS performance evaluation tool?

What is the simpler alternative approach to applying the principle of Long Term Storage?

  • Read more about What is the simpler alternative approach to applying the principle of Long Term Storage?

What are the standards for volume control and runoff rates?

  • Read more about What are the standards for volume control and runoff rates?

What updates have been made to the water quality assessment for SuDS developments tools?

  • Read more about What updates have been made to the water quality assessment for SuDS developments tools?

What is the new SuDS performance evaluation tool?

  • Read more about What is the new SuDS performance evaluation tool?

What updates have been made to the surface water storage volume design tool?

  • Read more about What updates have been made to the surface water storage volume design tool?

What updates have been made to the greenfield runoff rate estimation tool?

  • Read more about What updates have been made to the greenfield runoff rate estimation tool?

What flows can be discharged from the site when there is more than one outfall or more than one receiving catchment?

  • Read more about What flows can be discharged from the site when there is more than one outfall or more than one receiving catchment?

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