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A dynamic model for flow and wind driven sediment resuspension in a shallow basin
Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Faculty of Science and Technology, Biology, Department of Ecology and Evolution. Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Faculty of Science and Technology, Biology, Department of Ecology and Evolution, Limnology. Limnologi.
Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Faculty of Science and Technology, Biology, Department of Ecology and Evolution. Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Faculty of Science and Technology, Biology, Department of Ecology and Evolution, Limnology. Limnologi.
2003 (English)In: Hydrobiologia, Vol. 494, 1-3 p.Article in journal (Refereed) Published
Abstract [en]

A model is presented, which describes the daily variations in suspended particulate inorganic matter (SPIM) in a large (61 km2), shallow (mean depth 3.4 m) wind-exposed lake basin at the western end of Lake Mälaren, Sweden. Field studies have shown that wind speed and river inflow are the two major factors leading to changes in SPIM. Wind speed and beam attenuation were measured at high (10 min) frequency, while river inflow were monitored at daily frequency to develop the model. From these field measurements, model-coefficients were determined for the SPIM transport, settling and resuspension. Large-scale variations in SPIM lasting many weeks could be explained by events of high river inflow with a correspondingly high particle load. The threshold for river transported SPIM to have effect on lake concentration was 150 m3 s-1, while wind induced resuspended SPIM was related to the square root of wind speed.

Place, publisher, year, edition, pages
2003. Vol. 494, 1-3 p.
Keyword [en]
sediment resuspension, model, river flow, wind, SPIM, beam transmissiometer
Identifiers
URN: urn:nbn:se:uu:diva-79977OAI: oai:DiVA.org:uu-79977DiVA: diva2:107891
Available from: 2006-04-19 Created: 2006-04-19 Last updated: 2011-01-13

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