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Water quality issues facing dairy farming: potential natural and built attenuation of nitrate losses in sensitive agricultural catchments

journal contribution
posted on 2024-06-21, 03:49 authored by Ranvir Singh, David Horne
We developed a conceptual catchment-scale modelling analysis assessing potential natural and built attenuation of nitrate losses from dairy farming in the Tararua and Rangitikei catchments (located in the lower part of the North Island, New Zealand). This exploratory analysis suggests that a reduction of greater than 25% in the river nitrate loads from dairy-farming areas could potentially be achieved by spatially aligning dairy land with areas of high subsurface nitrate-attenuation capacity, and by managing critical flow pathways using innovative edge-of-field technologies such as controlled drainage, drainage-water harvesting for supplemental irrigation, woodchip bioreactors, and constructed wetlands in the study catchments.

Funding

Funded by the New Zealand Ministry for Business, Innovation and Employment's Our Land and Water National Science Challenge (Toitū te Whenua, Toiora te Wai) as part of project Benign Denitrification in Groundwaters

History

Publication date

2019-11-07

Language

  • English

Does this contain Māori information or data?

  • No

Journal title

Animal Production Science

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