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Annual variability of nitrogen concentrations and export from forested catchments: A consequence of climatic variability, sampling strategies or human interference?
Linköping University, The Tema Institute.
2000 (English)In: Boreal environment research, ISSN 1239-6095, Vol. 5, no 3, 221-233 p.Article in journal (Refereed) Published
Abstract [en]

This study was based on the data from 18 years of monitoring in six forested catchments. The aim was to find links between annual estimates of export and concentrations of NO3-N and organic N and hydroclimatological factors, sampling strategy and human interference. A topography-based wetness index was used to assess whether the effects of forestry activities depended on prevailing wetness conditions. For organic N, annual runoff was the main explaining factor in three catchments. The flow condition during sampling was for organic N the main explaining factor in three and for NO3-N in one catchment. Effects of clear-cutting of 14% in one catchment were observed. For organic N, the model could be improved by considering clear-cutting in wet areas only. The southernmost catchment, but also the northernmost catchment with the lowest deposition, showed links to atmospheric deposition, demonstrating that deposition can cause a significant direct response in streamwater concentrations in nutrient-poor catchments.

Place, publisher, year, edition, pages
2000. Vol. 5, no 3, 221-233 p.
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Social Sciences Interdisciplinary
Identifiers
URN: urn:nbn:se:liu:diva-31036Local ID: 16743OAI: oai:DiVA.org:liu-31036DiVA: diva2:251859
Available from: 2009-10-09 Created: 2009-10-09 Last updated: 2011-01-14

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Andersson, Lotta

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