Modelling instream nitrogen variability in the Dee catchment, NE Scotland

A J Wade, C Soulsby, S J Langan, P G Whitehead, A C Edwards, D Butterfield, R P Smart, Y Cook, R P Owen

Research output: Contribution to journalArticlepeer-review

38 Citations (Scopus)


The Integrated Nitrogen in CAtchments model (INCA) was applied to the River Dee, Aberdeenshire, NE Scotland. To a first approximation the model was able to simulate the annual mean streamwater NO3-N concentrations observed along the length of the main channel. This provided the basis for using INCA to subsequently explore the effects of N deposition and land use management on streamwater NO3-N concentrations and loads. On an annual timescale, the model predictions suggest that NO3-N concentrations will decrease by 5% following a 20% reduction in fertiliser application. Furthermore, model results also suggest that a 50% increase in N deposition will cause a 15% increase in the streamwater NO3-N concentrations. The utility of INCA as a tool for catchment management is discussed, current limitations are highlighted and possible improvements are suggested. (C) 2001 Elsevier Science B.V. All rights reserved.

Original languageEnglish
Pages (from-to)229-252
Number of pages24
JournalScience of the Total Environment
Issue number1-3
Publication statusPublished - 29 Jan 2001


  • basin management
  • hydrochemistry
  • scale models
  • nitrogen
  • INCA model
  • land ocean interaction
  • multiple source assessment
  • surface waters
  • Scottish catchment
  • critical loads
  • Great-Britain
  • river basins
  • North-Sea
  • management
  • deposition


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