Good drainage will allow all-weather access, the collection of effluent run-off and reduce odour.
- Use gravity wherever you can
- Incorporate drains or diversion banks, an area to remove solids from liquid effluent and catch drains to carry storm water run-off
- Aim for 2% – 4% slopes – less than 2% will inhibit drainage, while steep slopes may speed up the run-off and cause erosion
- If flood washing or dry scraping on a concrete surface, use a 3% slope
- Remove solids before they enter pipes for fewer blockages
- Make sure pad surface is well compacted and pipes are laid at appropriate depth – this will avoid pipe collapse and leaking joints
Sizing & storage
Get expert advice when sizing effluent storage ponds – see List of Accredited Advisers
The following should be considered:
Take account of rain falling on roofs, the feed pad and loafing areas.
The period you need to be able to collect and store effluent until it can be safely re-used on pasture and crops. Periods can range from 92 days in dry regions to 180 days in wetter areas.
Recommended storage period includes May to August when there is no irrigation water available for shandying.