Linking wave loads with the intensity of erosion along the coasts of Latvia; pp. 359–374Full article in PDF format | doi: 10.3176/eng.2011.4.06
Numerically estimated wave properties and the associated closure depth along the eastern Baltic Sea coast from the Sambian (Samland) Peninsula up to Pärnu Bay in the Gulf of Riga are compared against the existing data about accumulation and erosion. Typical values of the closure depth are about 5–6 m (maximum 6.58 m) at the open Baltic Sea coast, 3–4 m in the Gulf of Riga and 2–2.5 m in semi-sheltered smaller bays. The areas of intense accumulation or erosion (especially the areas of their high variability) generally coincide with the sections, hosting high wave intensity, except for a few locations, dominated by anthropogenic impact. It is shown that the longshore variations in wave intensity (or closure depth) can be used to identify the location of major accumulation and erosion domains. The sections that host the largest change in the wave height along the coast reveal erosion or accumulation features, depending on the predominant wave approach direction.
2. Soomere, T. Extremes and decadal variations of the northern Baltic Sea wave conditions. In Extreme Ocean Waves (Pelinovsky, E. and Kharif, C., eds). Springer, 2008, 139–157.
3. Harff, J., Lemke, W., Lampe, R., Luth, F., Lübke, H., Meyer, M., Tauber, F. and Schmolcke, U. The Baltic Sea coast-A model of interrelations among geosphere, climate, and anthroposphere. In Coastline Changes: Interrelation of Climate and Geological Processes. Geological Society of America Special Papers, 2007, 426, 133–142.
4. Labuz, T. A. The West Pomerania coastal dunes – alert state of their development. Zeitschrift der Deutschen Gesellschaft für Geowissenschaften, 2009, 160, 113–122.
8. Ryabchuk, D., Kolesov, A., Chubarenko, B., Spiridonov, M., Kurennoy, D. and Soomere, T. Coastal erosion processes in the eastern Gulf of Finland and their links with geological and hydrometeorological factors. Boreal Environ. Res., 2011, 16 (Suppl. A), 117–137.
10. Leont¢yev, I. O. Budget of sediments and forecast of long-term coastal changes. Oceanology, 2008, 48, 428–437.
11. Suursaar, Ü., Jaagus, J., Kont, A., Rivis, R. and Tõnisson, H. Field observations on hydrodynamic and coastal geomorphic processes off Harilaid Peninsula (Baltic Sea) in winter and spring 2006–2007. Estuar. Coast. Shelf Sci., 2008, 80, 31–41.
12. Orviku, K., Suursaar, Ü., Tõnisson, H., Kullas, T., Rivis, R. and Kont, A. Coastal changes in Saaremaa Island, Estonia, caused by winter storms in 1999, 2001, 2005 and 2007. J. Coast. Res., 2009, 25, (SI 56), 1651–1655.
13. Tõnisson, H., Suursaar, Ü., Orviku, K., Jaagus, J., Kont, A., Willis, D. A. and Rivis, R. Changes in coastal processes in relation to changes in large-scale atmospheric circulation, wave parameters and sea levels in Estonia. J. Coast. Res., 2011, 27, (SI 64), 701–705.
16. Zaitseva-Pärnaste, I., Suursaar, Ü., Kullas, T., Lapimaa, S. and Soomere, T. Seasonal and long-term variations of wave conditions in the northern Baltic Sea. J. Coast. Res., 2009, 25, (SI 56), 277–281.
20. Soomere, T., Kask, A., Kask, J. and Healy, T. R. Modelling of wave climate and sediment transport patterns at a tideless embayed beach, Pirita Beach, Estonia. J. Marine Syst., 2008, 74, Suppl., S133–S146.
26. Tõnisson, H., Orviku, K., Jaagus, J., Suursaar, Ü., Kont, A. and Rivis, R. Coastal damages on Saaremaa Island, Estonia, caused by the extreme storm and flooding on January 9, 2005. J. Coast. Res., 2008, 24, 602–614.
27. Suursaar, Ü. and Kullas, T. Decadal changes in wave climate and sea level regime: the main causes of the recent intensification of coastal geomorphic processes along the coasts of Western Estonia? In Coastal Processes. WIT Transactions on Ecology and the Environment, 2009, 126, 105–116.
29. Zhang, W. Y., Harff, J., Schneider, R. and Wu, C. Y. Development of a modelling methodology for simulation of long-term morphological evolution of the southern Baltic coast. Ocean Dynam., 2010, 60, 1085–1114.
31. Soomere, T. and Healy, T. R. On the dynamics of “almost equilibrium” beaches in semi-sheltered bays along the southern coast of the Gulf of Finland. In The Baltic Sea Basin (Harff, J., Björck, S. and Hoth, P., eds). Springer, Heidelberg, 2011, 255–279.
32. Suursaar, Ü. Waves, currents and sea level variations along the Letipea-Sillamäe coastal section of the southern Gulf of Finland. Oceanologia, 2010, 52, 391–416.
36. Kartau, K., Soomere, T. and Tõnisson, H. Quantification of sediment loss from semi-sheltered beaches: a case study for Valgerand Beach, Pärnu Bay, the Baltic Sea. J. Coast. Res., 2011, 27, (SI 64), 100–104.
39. Nicholls, R. J., Birkemeier, W. A. and Hallermeier, R. J. Application of the depth of closure concept. In Proc. 25th International Conference on Coastal Engineering. ASCE, Orlando, 1996, 3874–3887.
40. Komen, G. J., Cavaleri, L., Donelan, M., Hasselmann, K., Hasselmann, S. and Janssen, P. A. E. M. Dynamics and Modelling of Ocean Waves. Cambridge University Press, 1994.
42. Lehmann, A., Getzlaff, K. and Harlass, J. Detailed assessment of climate variability in the Baltic Sea area for the period 1958 to 2009. Clim. Res., 2011, 46, 185–196.
47. Räämet, A., Soomere, T. and Zaitseva-Pärnaste, I. Variations in extreme wave heights and wave directions in the north-eastern Baltic Sea. Proc. Estonian Acad. Sci., 2010, 59, 182–192.
48. Kamphuis, J. W. Introduction to Coastal Engineering and Management. World Scientific, Singapore, New Jersey, 2000.49. Jaagus, J. Long-term changes in frequencies of wind directions on the western coast of Estonia. Publications, Institute of Ecology at Tallinn University, 2009, 11, 11–24.
Back to Issue