Experimental studies of internal and rear-bed dynamics of restricted exchange flows

Magda Carr, Alan Cuthbertson, Janek Laanearu, Joel Sommeria, Jonathan Kean, Madis-Jaak Lillover, Monika Kollo, Monika Kollo, Jarle Berntsen, Oyvind Thiem, Samuel Viboud

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Results are presented from a series of experiments investigating the internal and near-bed dynamics of restricted net exchange flows across a submerged sill obstruction. Experimental measurements focused on obtaining high-resolution velocity and density profiles in the vicinity of the obstruction to observe and quantify both interfacial mixing and boundary layer processes under a range of parametric forcing conditions (i.e. variable saline and fresh water flow rates; density differences; water levels). Detailed synoptic velocity fields were also measured across the obstruction through particle image velocimetry (PIV) to aid qualitative and quantitative interpretation of these internal and near-bed flow processes, with a focus on defining the specific parametric conditions under which saline intrusions could become arrested through erosion of the intrusion nose at the bed boundary by the freshwater outflow layer. In this regard, it is anticipated that the study findings will provide an important step towards achieving improved representation of interfacial mixing and boundary layer processes within semi-enclosed estuaries and fjords, which are often poorly represented in current numerical models.
Original languageEnglish
Title of host publication36th IAHR World Congress, The Hague, Netherlands 2015
Subtitle of host publicationIAHR World Congress Proceedings
EditorsArthur Mynett
PublisherInternational Association for Hydraulic Research
Number of pages4
ISBN (Electronic)9789082484601
Publication statusPublished - 2015
Event36th IAHR World Congress: Deltas of the Future - World Forum, Churchillplein 10, The Hague, Netherlands
Duration: 28 Jun 20153 Jul 2015
Conference number: 36th
https://www.un-ihe.org/36th-iahr-world-congress

Conference

Conference36th IAHR World Congress
CountryNetherlands
CityThe Hague
Period28/06/153/07/15
Internet address

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Cite this

Carr, M., Cuthbertson, A., Laanearu, J., Sommeria, J., Kean, J., Lillover, M-J., Kollo, M., Kollo, M., Berntsen, J., Thiem, O., & Viboud, S. (2015). Experimental studies of internal and rear-bed dynamics of restricted exchange flows. In A. Mynett (Ed.), 36th IAHR World Congress, The Hague, Netherlands 2015: IAHR World Congress Proceedings International Association for Hydraulic Research.