# Effluent application rates

## Travelling irrigators

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To calculate the distance an irrigator needs to travel (in metres) per hour:

output volume in litres per hour°

desired depth of applied effluent in millimetres*
spray swath width in metres       =
metres per hour
° If you know your output volume as cubic metres (m³), multiply this value by 1000 to give litres per hour.
* The maximum depth for application is 25 mm at one time.

## Stationary spray 'cannons'

To calculate the length of time a spray head can be postitioned in any one place, three simple calculations have to be made:

1.    Determine the area covered by the spray head:
x    =
circle in metres
Pi area covered by the spray head in square metres

2.    Determine the quantity of effluent required to cover the area to the desired depth :

desired depth of applied effluent
in millimetres*
x    =
area covered by the spray head in square metres quantity of effluent required in cubic metres

* The maximum depth for application is 25 mm at any one time.

3.    Determine the time the spray head can stay in one position:

quantity of effluent required in cubic metres

x

=
pump capacity in cubic metres
per hour
minutes number of minutes the spray head can stay in any one position

## Slurry tankers / effluent wagons

To calculate the distance an irrigator needs to travel (in metres) per hour:

volume of the tanker in litres

desired depth of applied effluent in millimetres*
spray swath width in metres     =
metres to travel to empty each load
* The maximum depth for application is 25 mm at any one time