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A review of the policies and implementation of practices to decrease water quality impairment by phosphorus in NZ, the UK, and the US

journal contribution
posted on 2024-06-21, 03:49 authored by Rich McDowellRich McDowell, Rachael Dils, Adrian Collins, Katie Flahive, Andrew Sharpley, John Quinn
We outline policy in New Zealand, the UK, and the US who have imposed limits for P. We contrast the strategies used and discuss their likelihood of being able to decrease P losses and improve water quality. A poor understanding of catchment processes and critical source areas of P loss has resulted in some areas where regulation has had minimal effect on P discharges. Furthermore, we give several examples where social and economic challenges are of equal if not greater relevance to P discharges (e.g. subsidies). Other policy instruments (e.g. trading schemes) may be needed at larger scales, but should be flexible and encourage innovation. There is increasing recognition among all 3 countries that while targeting good management practices can substantially decrease P losses from existing land use, to achieve 'good' water quality in catchment, policy may have to consider land use change.

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 Phosphorus Best Practice|Reasons for Water Quality Improvement

History

Publication date

2017-06-07

Language

  • English

Does this contain Māori information or data?

  • No

Journal title

Nutrient Cycling in Agroecosystems

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