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Spatial modeling in sediments
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- Danielsson, Åsa, 1970- (author)
- Linköpings universitet,Tema vatten i natur och samhälle,Filosofiska fakulteten
- (creator_code:org_t)
- ISBN 9172192895
- Motala : Kanaltryckeriet, 1998
- English 89 s.
- Series: Linköping Studies in Arts and Science, 0282-9800 ; 178
- Doctoral thesis (other academic/artistic)
Abstract
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- In a marine environment the sediments play an important role. They act as sinks, where the concentrations often are higher than in the water mass above, but also as sources for numerous pollutants. Two of the major groups of pollutants are metals and nutrients While the metals may be harmful even in rather small concentrations the latter are mainly studied due to their importance in eutrophication. Three study areas are used - the Baltic Sea, Kattegat and Skagerrak - that are all effected by heavy metal pollution and high nutrient loads. The sediments, in these areas, can not be seen as homogeneous. Spatial distribution, scales, patterns, covariation between different substances and other characteristics of nutrients and metals in the sediments give important information on e.g. deposition processes and sources. It is revealed that point sources do not have any major influence on the distribution of pollutants in the sediments. Instead it seems like biogeochemical processes mainly control the patterns found. In all three areas, carbon and nitrogen give similar patterns, indicating similar deposition processes. It is harder to determine correlation scales in Kattegat than in Skagerrak, where the latter has longer scales. This is also seen for the metals where e.g. cadmium, copper and mercury have less clear scales than both carbon, nitrogen and lead, which may be interpreted as a result of different sources and behaviour of substances. The results suggest that spatial information is important in sediment analysis and in designing future monitoring programs.
Subject headings
- SAMHÄLLSVETENSKAP -- Annan samhällsvetenskap -- Tvärvetenskapliga studier inom samhällsvetenskap (hsv//swe)
- SOCIAL SCIENCES -- Other Social Sciences -- Social Sciences Interdisciplinary (hsv//eng)
Keyword
- INTERDISCIPLINARY RESEARCH AREAS
- TVÄRVETENSKAPLIGA FORSKNINGSOMRÅDEN
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