Effects of input data quality and quantity on evaluation of land management policies and agri-environment interventions at catchment to national scales


Jack Cosby1; Andy Wade2; Amy Thomas1.

1Centre for Ecology and Hydrology, Bangor; 2Reading University.

Stakeholder Representatives

Paul Whitehead, Oxford University.

Forum issues addressed by case study

How can I know if land management will be effective?

  • What is the effect of different land management interventions on water quality?
  • Will what I’m doing provide secondary or wider benefits in the catchment for carbon, biodiversity or other ecosystem functions?

Does it matter what data and models I use in planning /assessing catchment management? Can the answers they provide be transferred to other catchments?

  • Is the answer sensitive to the quality and quantity of input data?
  • Is the answer sensitive to different models?

How can I look at sensitivity / impacts on different catchment functions / services?

  • Is freshwater biology more or less sensitive than chemistry? 


CaMMP Case Study 1
Conwy Catchment, North Wales and England


  • Management outcome
  • Other services
  • Confidence levels


  • Phosphorus
  • Nitrate


  • Catchment / National


  • LUCI
  • INCA-Pathogens