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Isaksson, Linda, 2013. pH-sensitivity in boreal streams – the influence of landscape characteristics. Second cycle, A2E. Uppsala: SLU, Dept. of Aquatic Sciences and Assessment

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Abstract

The goal of the society to increase the proportion of renewable energy has led to an increased demand of bioenergy e.g. forest biomass. However, there are concerns that removal of biomass will lead to decreased base cation concentrations in the soils and acidification of streams. In order to find in which types of landscape removal of branches and tops could have such negative effects, this study aims to analyse the relations between pH-sensitivity and landscape variables in the Bothnia Bay water district. GIS and digital geographical data were used to analyse the landscape in subcatchments. This data were analysed together with stream water chemistry data by using principal component analysis. The results indicate differences between the north and south parts of the district. In the northern subcatchments, pH-sensitivity was positively correlated to water surfaces and coarse quaternary deposits with Scots pine forests. In the south, pH-sensitive streams were positively correlated to till soils and the concentrations of total organic matter (TOC). In both areas, alkalinity and ANC were the most important factors indicating that the buffering capacity primarily was due to weathering.

Main title:pH-sensitivity in boreal streams – the influence of landscape characteristics
Authors:Isaksson, Linda
Supervisor:Löfgren, Stefan and Ågren, Anneli
Examiner:Fölster, Jens
Series:UNSPECIFIED
Volume/Sequential designation:UNSPECIFIED
Year of Publication:2013
Level and depth descriptor:Second cycle, A2E
Student's programme affiliation:NM010 Soil and Water Management - Master's Programme 120 HEC
Department:(NL, NJ) > Dept. of Aquatic Sciences and Assessment
Keywords:pH-sensitivity, catchment, Base cations, Bothnia Bay water district, boreal streams
URN:NBN:urn:nbn:se:slu:epsilon-s-2465
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-s-2465
Subjects:Forestry - General aspects
Water resources and management
Language:English
Deposited On:01 Jul 2013 11:48
Metadata Last Modified:01 Jul 2013 11:48

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