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Seasonal Variation of Inorganic Nutrients (DSi, DIN and DIP) Concentration in Swedish River
Linköping University, The Tema Institute, Department of Water and Environmental Studies.
2007 (English)Independent thesis Advanced level (degree of Magister), 20 points / 30 hpStudent thesis
Abstract [en]

Rivers have been playing most important role as fresh water source and medium of nutrient transportation from terrestrial to aquatic ecosystem. Inorganic form of nutrients (DSi, DIN and DIP) are plant available mostly control the productivity of aquatic ecosystem. Transfer of these nutrients in higher concentrations cause harmful eutrophication in receiving water body.

Study of dissolved inorganic nutrients concentrations in 12 Swedish rivers of different basin characteristics demonstrated both similar and varying behaviour from river to river and from season to season depending on catchment hydrology; land use and geology. Highest concentration did not coincide with the highest runoff. High DSi concentration observed in the unperturbed rivers however, high DIN and DIP concentration observed in agriculture dominated river followed by river basin dominated by industrial and urban activities. DSi and DIN concentration observed high in winter and decreased through spring to reach lowest in summer. DIP concentration although found low in summer but high concentration observed in early spring and early autumn. Rivers with low average runoff positively correlated with DSi and DIN concentration however, DIP demonstrated weak correlation.

Place, publisher, year, edition, pages
Tema vatten i natur och samhälle , 2007. , 65 p.
Keyword [en]
Nutrient, River, Season, Runoff, Correlation
National Category
Oceanography, Hydrology, Water Resources
URN: urn:nbn:se:liu:diva-10387ISRN: LIU-TEMA/VMPWLS-D-07/013OAI: diva2:17141
2007-11-08, Lethe, TEMA, Department of Water and Environmental Studies, Linköping, 16:00
Available from: 2007-12-06 Created: 2007-12-06

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Oceanography, Hydrology, Water Resources

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