PIPE FLOW CALCULATOR
This spreadsheet uses the Colebrook-White and Manning Equations to calculate the flow capacity and velocity in pipes acting under gravity.
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Buried Pipe Design Spreadsheet
This spreadsheet can be used to design concrete, steel, plastic and other buried pipes in accordance with BS EN 1295-1.
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Manning Open Channel Design Spreadsheet
This spreadsheet uses the Manning formula to calculate the flow conditions in an open channel acting under gravity only.
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Runoff Calculator Spreadsheet
This spreadsheet calculates the design runoff flow for a site in accordance with the Flood Estimation Handbook.
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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.
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Attenuation Design Spreadsheet
This spreadsheet calculates the requirements for a attenuation system and assists the user to design a suitable system.
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Field Drain Design Spreadsheet
This spreadsheet can be used to design field drains, typically subsurface drainage systems used to drain fields and open areas.
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Drainage Field Design Spreadsheet
This spreadsheet can be used to design septic infiltration systems known as drainage fields, leach fields or septic drain fields.
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TP108 Spreadsheet
This spreadsheet calculates the rainfall for New Zealand catchments in accordance with TP108.
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Roof Downpipe Calculator Spreadsheet
This spreadsheet calculates the size of roof drainage downpipes depending on the roof catchment and rainfall requirements.
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Permeable Pavement Design Spreadsheet
This spreadsheet is designed to determine the size and characteristics of permeable pavements.
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Infiltration Blanket Design Spreadsheet
This spreadsheet can be used to design thin depth infiltration systems, typically called infiltration blanket systems.
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Swale Design Spreadsheet
This spreadsheet can be used to design swales. These linear grassed channels can be used both to convey, infiltrate and filter surface drainage runoff.
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Filter Strip Design Spreadsheet
This spreadsheet is designed to analyse surface water filter strips and to determine the max flow depth and max flow velocity and determine whether they are in accordance with relevant standards.
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Hydraulic Gradient Analysis Spreadsheet
This spreadsheet analyses the hydraulic and energy grade lines for drainage systems with up to 10 drainage runs.
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Soakaway Design Spreadsheet
This spreadsheet calculates the requirements for a soakaway system and assists the user to design a suitable system.
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Concrete Protection Slab
This detailed design spreadsheet designs a protection slab commonly installed to protect shallow pipes.
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French Drain Design
This spreadsheet completes French Drain Design in accordance with the SUDS Manual.
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Sharp Crested Weir Flow Calculator Spreadsheets
This suite of 5 separate spreadsheets calculates the flow over sharp crested weirs of all shapes and sizes.
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Drainage Design Spreadsheet
This is the full suite of drainage design spreadsheets, available at a massive discount for only £49.99.