Weed has an annual growth cycle and is seasonal meaning growth changes depending on weather conditions. Generally a continued maintenance program is the best method for optimising water quality.
This depends on variables in each harvesting operating. Variables are weed bed distance from shoreline, weed density, extraction method from harvester, and disposal method. Our pricing model is capable of calculating accurate harvest program costs.
Visual results are immediate as weed is removed. Water quality results are rapid as toxins are removed and this has an effect on wildlife rejuvenation.
Absolutely – by removing the weed itself the results are dramatic. Weed no longer decomposes over the winter which reduces sediment build-up, gas release and stops depletion of oxygen in the water column. Nitrates and phosphates accumulate in weed and so are removed with weed harvesting.
In general the impact is minimal. However some fishlife are brought up with the weed, these are released wherever possible.
Yes the most common method is spraying weeds using chemical application. There are other dredging systems, vacuum systems, divers and manual systems which can be used however it is our experience these are very labour intensive.
Our safety program works under the maritime NZ Safe Ship Regulations. We operate a health and safety program for the complete operation meaning there is no risk or liability for the consumer.
The weed is loaded onto a dump truck by the digger and transported to a designated dump site for storage. In many cases a sealed road truck is then loaded to transport the weed to a worm farm and turned into a fertiliser.
We cannot unfortunately due to the risk of Didymo infection.
No harmful chemicals are used in the operation. Fuels and oils are used to operate machinery , these are well contained and should not enter the waterways. A small amount of chemical is used for cleaning down, these are bio-degradable.
It is transported on a specially designed trailer.