Hydraulics

Pipe flow and velocity calculator based on the Mannings equation for multiple pipe sizes, materials and slopes. 

Open channel flow and velocity calculator based on the Mannings equation for multiple cross section sizes, materials and slopes. 

Calculator based on the Mannings equation for circular and rectangular culverts, for multiple sizes, materials and slopes. 

Gutter peak flow and width calculator based on the Mannings equation.

Downpipe calculator based on the rational method.

Calculate the critical time of concentration for a given catchment based on the Kinetic Wave Equation. 

Simple calculator to estimaet the critical peak flow for a given catchment based on the Rational Method ecuations.

Calculate the flow for a given weir.

Calculate the flow of an orifice outlet for a given water head, orifice type and diametre.

Calculate the runoff film depth of water over a sloping surface to ensure it's within acceptable parametres to reduce aquaplanning risk.

Understand the different storm event frequencies and how they are related to each other.

A quick preliminary calculator to understand volume requirements for a given site. Inputs required are the total catchment area, the percentange of impervious area, the design rainfall depth, outlet discharge rate (if any), and critical storm duration.