Drainage Design Spreadsheets

Colebrook White Pipe Design Spreadsheet

This spreadsheet uses the Colebrook-White and Darcy-Weisbach formulas to calculate the flow conditions in a circular pipe acting under gravity.

Find Out More

Manning Pipe Design Spreadsheet

This spreadsheet uses the Manning formula to calculate the flow conditions in a circular pipe acting under gravity only.

Learn More

Manning Open Channel Design Spreadsheet

This spreadsheet uses the Manning formula to calculate the flow conditions in an open channel acting under gravity only.

Learn More

Runoff Calculator Spreadsheet

This spreadsheet calculates the design runoff flow for a site in accordance with the Flood Estimation Handbook.

Learn More

Linear Drainage Design Spreadsheet

This spreadsheet calculates the maximum flow from a specified linear drainage channel and checks whether the channel is sufficient for the specified site and storm conditions.

Learn More

Attenuation Design Spreadsheet

This spreadsheet calculates the requirements for a attenuation system and assists the user to design a suitable system.

Learn More

Soakaway Design Spreadsheet

This spreadsheet calculates the requirements for a soakaway system and assists the user to design a suitable system.

Learn More

Full Drainage Design Suite

Full drainage design suite (50% Discount) including 7 spreadsheets;

  • Colebrook White Pipe Design
  • Manning Pipe Design
  • Manning Open Channel Design
  • Linear Drainage Design
  • Runoff Calculator
  • Attenuation Design
  • Soakaway Design

Learn More