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Waterborne sediment and pollutant transport into lakes and accumulation in lake sediments
Stockholm University, Faculty of Science, Department of Physical Geography and Quaternary Geology.
2008 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

The general objective of this thesis is to contribute to the knowledge of the transport of sediments and pollutants from catchments to downstream water recipient systems and their accumulation in these systems, such as lakes and lake sediments. One part of the thesis studies the importance of drainage reach morphology and water flow for the phosphorous (P) transport and retention in the reaches, and the main controlling processes of the P retention in the reach sediments. The second part of the thesis investigates and describes the environmental history of sediment, P and metal transport into and accumulation in the sediments of bay Karlskärsviken, a typical near-shore zone in Lake Mälaren, west of Stockholm, Sweden. The thesis generally shows that the investigated P and metal loads (except for lead) into the near-shore zones of Lake Mälaren have increased over the last 30-40 years and, in spite of environmental regulation, not yet started to decrease. The thesis further shows that the P retention rate in drainage reaches depends on the reach depth and water flow, where shallow reaches retain P faster than deeper ones. A decrease of reach depth and/or water flow, e.g., by allowing ditches to meander and/or become overgrown with vegetation, may therefore decrease the P and possibly also other nutrient and pollutant loading into the recipient waters.

Place, publisher, year, edition, pages
Stockholm: Institutionen för naturgeografi och kvartärgeologi , 2008. , 85 p.
Series
Dissertations from the Department of Physical Geography and Quaternary Geology, ISSN 1653-7211 ; 17
Keyword [en]
Catchment, environmental projects, erosion, eutrophication, phosphorous transport and retention, soil transport, sediment accumulation
National Category
Physical Geography
Research subject
Physical Geography
Identifiers
URN: urn:nbn:se:su:diva-8302ISBN: 978-91-7155-762-9 (print)OAI: oai:DiVA.org:su-8302DiVA: diva2:200037
Public defence
2008-12-04, De Geersalen, Geovetenskapens hus, Svante Arrhenius väg 8 A, Stockholm, 13:00
Opponent
Supervisors
Available from: 2008-11-13 Created: 2008-11-04Bibliographically approved
List of papers
1. Field study of phosphorous transport and retention in drainage reaches
Open this publication in new window or tab >>Field study of phosphorous transport and retention in drainage reaches
Manuscript (Other academic)
Identifiers
urn:nbn:se:su:diva-25600 (URN)
Note
Part of urn:nbn:se:su:diva-8302Available from: 2008-11-13 Created: 2008-11-04 Last updated: 2010-01-13Bibliographically approved
2. Historic sediment accumulation rates in Karlskärsviken, a bay of Lake Mälaren, Sweden
Open this publication in new window or tab >>Historic sediment accumulation rates in Karlskärsviken, a bay of Lake Mälaren, Sweden
2008 In: Hydrology Research, ISSN 1998-9563, Vol. 39, no 2, 122-132 p.Article in journal (Refereed) Published
Identifiers
urn:nbn:se:su:diva-25601 (URN)000254273000004 ()
Note
Part of urn:nbn:se:su:diva-8302Available from: 2008-11-13 Created: 2008-11-04Bibliographically approved
3. Long-term heavy metal loading to near-shore lake sediments
Open this publication in new window or tab >>Long-term heavy metal loading to near-shore lake sediments
2008 (English)In: Water, Air and Soil Pollution, ISSN 0049-6979, E-ISSN 1573-2932, Vol. 192, no 1-4, 105-116 p.Article in journal (Refereed) Published
Abstract [en]

Long-term sediment pollution by lead (Pb), copper (Cu) and zinc (Zn) is investigated in Karlskarsviken, a typical bay of Lake Malaren, about 10 km northwest of Stockholm. We find that metal accumulation rates in the sediments of Karlskarsviken increase considerably more in the outer than in the inner bay section, all the time since medieval times and even more so after than before industrialisation. Resulting metal accumulation rates are dominated by increasing sediment accumulation rate and its spatial-temporal patterns. This indicates significant waterborne metal pollution contributions to the bay sediments, which continue until present times and are still increasing for Zn and Cu. The outer Karlskarsviken bay section is then mainly affected by regional waterborne discharges, while the inner bay section is mainly affected by local discharges, in addition to the atmospheric deposition that affects the whole bay and Lake Malaren similarly. The present results indicate possible important shortcomings in environmental regulation, management and monitoring systems that consider only sediment concentration levels and neglect pollutant accumulation rates and diffuse metal load contributions from slow subsurface transport into surface water environments.

Keyword
metal pollution, mine wastes, mine voids, groundwater transport, lead, copper, zinc, water quality
National Category
Oceanography, Hydrology, Water Resources Meteorology and Atmospheric Sciences Environmental Sciences
Identifiers
urn:nbn:se:su:diva-25602 (URN)10.1007/s11270-008-9638-7 (DOI)000256915400011 ()
Available from: 2008-11-13 Created: 2008-11-04 Last updated: 2017-12-13Bibliographically approved
4. Determination of historical trophic state variation in lakes using sediment stratigraphies
Open this publication in new window or tab >>Determination of historical trophic state variation in lakes using sediment stratigraphies
2007 In: Hydrology and Earth System Sciences, ISSN 1027-5606, Vol. 11, no 6, 1747-1756 p.Article in journal (Refereed) Published
Identifiers
urn:nbn:se:su:diva-25603 (URN)000251998500003 ()
Note
Part of urn:nbn:se:su:diva-8302Available from: 2008-11-13 Created: 2008-11-04Bibliographically approved

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