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ISEO 27 July 2010 MODAL ANALYSIS APPLIED TO THE STUDY OF THE INTERNAL WAVE STRUCTURE OF ISEO LAKE GIULIA VALERIO Universit degli Studi di Brescia

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Csanady (1972) - Buerle (1994) - Wang et al. (2000) - Fricker and Nepf (2000) - Lemmin and Mortimer (2005) - Antenucci and Imberger (2001) - Gomez-Giraldo et al. (2006) - Rueda et. al (2003) - Shimizu et al. (2007) Okely et al. (2010) QUESTION - How does a so complex bathymetry affect the internal wave structure in lake Iseo?

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NUMERICAL APPROACH - Modal model Mortimer (1974) - Lemmin and Mortimer (2005) - Shimizu et al. (2007) Shumizu and Imberger (2008) De la Fuente et al. (2008) Linear Linear Separation in time and space Separation in time and space Eigenvalue problem

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MODEL EXPERIMENTAL APPROACH - Field activity Becker and Miles (1991) Strub and Powell (1986) - Rueda et al. (2005) - Strub (1986)- Laval et al. (2003), Pan et al. (2002) - Shimizu et al. (2007) - Buerle (1994) - Okely et al. (2010) Forced waves - dominant mode 1 Forced waves - dominant mode 1 Influence of spatial variability of wind field on modes excitation Influence of spatial variability of wind field on modes excitation Poincar waves trapped Poincar waves trapped around the island Locations of the monitoring stations Locations of the monitoring stations Sampling strategy for temperature mapping Sampling strategy for temperature mapping www.rmso.com.au www.rmso.com.auwww.rmso.com.au

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FIELD ACTIVITY MODEL General agreement of the main basin scale motion (Cfr 17/7 T3; 18/7 T17) General agreement of the main basin scale motion (Cfr 17/7 T3; 18/7 T17) Problems in phase capturing in the south (Cfr olaris) non-uniform wind distribution? Problems in phase capturing in the south (Cfr olaris) non-uniform wind distribution? Excitation of vertical modes > 1 (Cfr 20/7 T22) necessity number of layers > 2 when the upper layer is shallow Excitation of vertical modes > 1 (Cfr 20/7 T22) necessity number of layers > 2 when the upper layer is shallow Non-linearity of the singnal limitations of the linear model Non-linearity of the singnal limitations of the linear model Thanks for your attention!