An estimated 900 farmers in the catchment, which runs from the foothills to the coastal region around Lake Ellesmere (Waihora), will by July this year need a land use consent to farm.
The requirement is laid out in the Selwyn Te Waihora section (Plan Change 1) of the Canterbury Land and Water Regional Plan, which specified new nutrient management limits and became operative in 2016.
Farmers in the zone must have a land use consent if they farm more than 10ha, and either:
• Have nitrogen losses of more than 15kg/ha/year.
• Are in designated phosphorus sediment risk areas (primarily heavier soils in two broad swathes, near the foothills and in the Lincoln and Leeston area).
• Are in designated cultural landscape/values management areas (primarily around the lake).
Zone committee facilitator Ian Whitehouse says ECan sent out about 2000 letters in February to rural property owners warning them they may need a consent.
At the same time ECan also announced a new nitrogen assessment tool, NCheck, approved for use only in the Selwyn Te Waihora catchment.
Whitehouse says NCheck is a very effective and valuable tool enabling people to estimate whether their nitrogen losses are greater or less than 15kg/ha/year.
ECan regards Selwyn Te Waihora as one of the more challenging catchments in the country, with low flows in the Selwyn River, and the lake at the bottom of the catchment acting as a sink for nutrient runoff.
Whitehouse says that as a wide shallow lake, in which sediment is easily stirred up in windy conditions, there is never any shortage of nutrients. “The lake grows algae very well.”
However, the total package is not just about what is required of farmers, but also covers other management issues over the lake margins, wetlands, and the lake level.
Whitehouse says the basis for the consent application will be a farm environment plan, which various industry bodies will help farmers to draw up.
Speaking at the recent Lincoln University Dairy Farm focus day, Ravensdown environmental consultant Arron Hutton said the consenting process is very complex because a number of different rules are in play, but the nitrogen limit of 15kg/ha/year will impact many.
“In most cases if you know you are an intensive farmer, such as a dairy farmer, it’s almost a given that you are going to have to take some sort of action.”
Hutton says farmers first need to realise what zone they’re in by consulting ECan’s www.canterburywater.farm website, then identify whether they need act.
“Phosphorus is an issue for the guys in Selwyn primarily on the heavier soils and nitrogen is the issue for the guys in Selwyn primarily on the lighter soils, both of which potentially can accumulate in the environment to negative effect.”
He says while many farmers will not have time to get the consent in place by July, ECan is allowing Ravensdown Environmental to run a waiting list.
“It is very much expected of the farmer that they will already have had a farm environment plan produced and in place before they go on the waiting list. And they are expected to have started to undertake the good management practises described in the FEP regardless of whether they are having to get the consent or not,” said Hutton.
“First get in touch with someone who understands your farm system and knows what the rules are, and they will be able to advise you what your best course is,” he advises.
“But not getting on a waiting list will not be an excuse at ECan’s end.”
