Effects of agricultural land management changes on surface water quality: A review of meso-scale catchment research

A.R. Melland, O. Fenton, P. Jordan

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

Measuring the environmental impacts of agricultural practice is critical for policy formulation and review, including policies implemented to improve water quality. Here, studies that measured such impacts in surface waters of hydrologically diverse meso-scale catchments (1–100 km2) were reviewed. Positive water quality effects were measured in 17 out of 25 reviewed studies. Successful farm practices included improved landscape engineering, improved crop management and reductions in farming intensity. Positive effects occurred from 1 to 10 years after the measures were implemented, with the response time broadly increasing with catchment size. However, it took from 4 to 20 years to confidently detect the effects. Policy makers and scientists should account for these hydrological and biogeochemical time lags when setting policy and planning monitoring in meso-scale catchments. To successfully measure policy effects, rates of practice change should also be measured with targeted water quality parameters.
LanguageEnglish
Pages19-25
JournalEnvironmental Science and Policy
Volume84
Early online date2 Mar 2018
DOIs
Publication statusE-pub ahead of print - 2 Mar 2018

Fingerprint

land management
agricultural land
catchment
surface water
water quality
agricultural practice
environmental impact
effect
policy
farm
engineering
crop
monitoring

Keywords

  • Mitigation
  • Measures
  • BMP
  • Agriculture
  • Management practice
  • Water quality
  • Catchment
  • Nitrogen
  • Phosphorus

Cite this

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Effects of agricultural land management changes on surface water quality: A review of meso-scale catchment research. / Melland, A.R.; Fenton, O.; Jordan, P.

In: Environmental Science and Policy, Vol. 84, 02.03.2018, p. 19-25.

Research output: Contribution to journalArticle

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KW - Nitrogen

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