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Sci Total Environ. 2018 Apr 15;621:1499-1511. doi: 10.1016/j.scitotenv.2017.10.078. Epub 2017 Oct 18.

Assessing the potential impacts of a revised set of on-farm nutrient and sediment 'basic' control measures for reducing agricultural diffuse pollution across England.

The Science of the total environment

A L Collins, J P Newell Price, Y Zhang, R Gooday, P S Naden, D Skirvin

Affiliations

  1. Sustainable Agriculture Sciences Department, Rothamsted Research, North Wyke, Okehampton, Devon EX20 2SB, UK. Electronic address: [email protected].
  2. ADAS, Gleadthorpe, Meden Vale, Mansfield, Nottinghamshire NG20 9PD, UK.
  3. Sustainable Agriculture Sciences Department, Rothamsted Research, North Wyke, Okehampton, Devon EX20 2SB, UK.
  4. ADAS, Titan 1 Offices, Coxwell Avenue, Wolverhampton Science Park, Wolverhampton WV10 9RT, UK.
  5. CEH Wallingford, Maclean Building, Benson Lane, Crowmarsh Gifford, Wallingford, Oxfordshire OX10 8BB, UK.

PMID: 29054654 PMCID: PMC5805857 DOI: 10.1016/j.scitotenv.2017.10.078

Abstract

The need for improved abatement of agricultural diffuse water pollution represents cause for concern throughout the world. A critical aspect in the design of on-farm intervention programmes concerns the potential technical cost-effectiveness of packages of control measures. The European Union (EU) Water Framework Directive (WFD) calls for Programmes of Measures (PoMs) to protect freshwater environments and these comprise 'basic' (mandatory) and 'supplementary' (incentivised) options. Recent work has used measure review, elicitation of stakeholder attitudes and a process-based modelling framework to identify a new alternative set of 'basic' agricultural sector control measures for nutrient and sediment abatement across England. Following an initial scientific review of 708 measures, 90 were identified for further consideration at an industry workshop and 63 had industry support. Optimisation modelling was undertaken to identify a shortlist of measures using the Demonstration Test Catchments as sentinel agricultural landscapes. Optimisation selected 12 measures relevant to livestock or arable systems. Model simulations of 95% implementation of these 12 candidate 'basic' measures, in addition to business-as-usual, suggested reductions in the national agricultural nitrate load of 2.5%, whilst corresponding reductions in phosphorus and sediment were 11.9% and 5.6%, respectively. The total cost of applying the candidate 'basic' measures across the whole of England was estimated to be £450 million per annum, which is equivalent to £52 per hectare of agricultural land. This work contributed to a public consultation in 2016.

Copyright © 2017 The Author(s). Published by Elsevier B.V. All rights reserved.

Keywords: Control measures; Costs; Efficacy; Nutrients; Sediment; Water Framework Directive

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