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    • Greenfield runoff rate estimation
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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
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  • SuDS-iQ
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What is brownfield or previously developed land?

  • Read more about What is brownfield or previously developed land?

Why is previously developed site runoff volume important?

  • Read more about Why is previously developed site runoff volume important?

What is Treatment Volume?

  • Read more about What is Treatment Volume?

Are there maximum areas that should discharge to individual SuDS components?

  • Read more about Are there maximum areas that should discharge to individual SuDS components?

How should “greenfield runoff rate” be applied to the site drainage design?

  • Read more about How should “greenfield runoff rate” be applied to the site drainage design?

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?

What is source control?

  • Read more about What is source control?

When is joint probability relevant for site drainage design?

  • Read more about When is joint probability relevant for site drainage design?

When is joint probability relevant for site drainage design?

  • Read more about When is joint probability relevant for site drainage design?

What is "designing for exceedence"?

  • Read more about What is "designing for exceedence"?

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