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Water, Air, and Soil Pollution

, Volume 130, Issue 1–4, pp 781–786 | Cite as

Assessment of Nitrogen Leaching at ICP-Waters Sites (Europe and North America)

  • John L. Stoddard
  • Tor S. Traaen
  • Brit Lisa Skjelkvåle
Article

Abstract

The International Cooperative Programme on Assessment and Monitoring of Acidification of Rivers and Lakes (ICP-Waters) is designed to assess the degree and geographical extent of acidification of surface waters. During the last 20 years, international emission reduction measures in Europe and North America have resulted in a decrease in atmospheric S-deposition of up to 50%, while N-deposition has stayed almost constant. Empirical relationships between N-deposition and stages of nitrogen saturation are used to assess the importance of nitrogen leaching at the ICP-Waters sites in Europe and North America. There is a clear coherence between high N saturation stages and high N deposition loads and more than 50% of the analysed ICP Waters sites show a high degree of nitrogen saturation, defined as stages 2 or 3 in Stoddard's classification system. Significant leaching of inorganic N also occurs at most sites with deposition greater than 10 kg/ha/yr.

nitrogen saturation surface water regional assessment ICP-Waters 

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References

  1. Dise, N. B., and Wright, R. F.: 1995, Forest Ecology and Management 71, 153.Google Scholar
  2. Hirsch, R. M., and Slack, J. R.: 1984, Water Resources Research 20, 727.Google Scholar
  3. Lükewille, A., Jeffries, J., Johannessen, M., Raddum, G., Stoddard, J., and Traaen, T.: 1997, The Nine Year Report: Acidification of Surface Water in Europe and North America. Long-term Developments (1980s and 1990s), Report O-86001, Norwegian Institute for Water Research, Oslo, Norwaypages.Google Scholar
  4. Stoddard, J. L.: 1994, ‘Long-term changes in watershed retention of nitrogen: its causes and aquatic consequences',in L. A. Baker (ed.), Environmental Chemistry of Lakes and Reservoirs, American Chemical Society, Washington, DC, pp.223–284.Google Scholar
  5. Stoddard, J. L., Jeffries, D. S., Lükewille, A., Clair, T. A., Dillon, P. J., Driscoll, C. T., Forsius, M., Johannessen, M., Kahl, J. S., Kellogg, J. H., Kemp, A., Mannio, J., Monteith, D., Murdoch, P. S., Patrick, S., Rebsdorf, A., Skjelkvåle, B. L., Stainton, M., Traaen, T., van Dam, H., Webster, K. E., Wieting, J., and Wilander, A.: 1999, Nature 401, 575.Google Scholar
  6. Stoddard, J. L., and Traaen, T. S.: The stages of nitrogen saturation: Classification of catchments included in “ICP on waters”, Mapping and modelling of critical loads for nitrogen — a workshop report, Grange-over-Sands, Cumbria, U.K., 69–76.Google Scholar
  7. Tarrasón, L., and Schaug, J.: 1999, Transboundary Acid Deposition in Europe, EMEP Summary Report 1999, Cooperative Programme for Monitoring and Evaluation of the Long Range Transmission of Air Pollutants in Europe.Google Scholar
  8. Traaen, T. S., and Stoddard, J. L.: 1995, An Assessment of Nitrogen Leaching from Watersheds included in ICP on Waters, Report No. 86001, Norwegian Institute for Water Research.Google Scholar

Copyright information

© Kluwer Academic Publishers 2001

Authors and Affiliations

  • John L. Stoddard
    • 1
  • Tor S. Traaen
    • 2
  • Brit Lisa Skjelkvåle
    • 2
  1. 1.Western Ecology DivisionU.S. EPACorvallis, OregonUSA
  2. 2.Norwegian Institute for Water ResearchOsloNorway

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