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Preventive Archaeology in Latvia: example investigations in the historical town centres on Kuldīga and Ventspils

100%
Zirne S., Lūsēns M., Vijups A.
Raport
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2015
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vol. 10
219-231
EN
This article deals with preventive archaeology issues in the Republic of Latvia. Legislative bacground provides presence of archaeologists in construction projects. During last decade in the Latvia the largest share of carried out archaeological fieldwork are archaeological supervisions. Despite of small scale rescue excavations and archaeological supervisions significant archaeological data has been collected on further investigations on historical development of ancient towns. As examples are presented the most interesting discoveries in the two towns located in the Western part of the Latvia – Kuldīga and Ventspils. Archaeological investigations of the town streets in Kuldīga, carried out by M. Lūsēns, supplemented the reconstruction and localization of old Kuldīga, mostly based on information found in written sources. Small-scale preventive archaeological projects that have taken place in the seaside town Ventspils has resulted in a study of A.Vijups on the impact of dune erosion processes on historical development of town.
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Storm surges versus shore erosion: 21 years (2000–2020) of observations on the Świna Gate Sandbar (southern Baltic coast)

86%
Łabuz T. A.
Quaestiones Geographicae
|
2022
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vol. 41
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issue 3
5-31
EN
Based on observations spanning 21 years (2000–2020), the article studies the effects of storm surges on the shore of the Świna Gate Sandbar in the southern part of the Pomeranian Bay (southern Baltic Sea). Impacts of selected maximum storm surges in each year were assessed with respect to morphological data collected on the beach and the foredune. The data included parameters of beach-dune erosion as measured along a beach transect before and after each surge. Differences and trends in the shore erosion were related to the sea level (SL), duration of a storm surge [highest storm sea level (HSL) > 1 m], wind-wave sector and wave run-up. The relationships were explored using a sim- ple correlation analysis. The most serious erosion was observed during the heaviest surges [HSL > 1.3 m above the mean sea level (AMSL)], with a wave run-up higher than 3.2 m AMSL. Such surges occurred at about 2-year intervals. The average SL during a surge was 1.2 m AMSL, with a run-up of 2.6 m AMSL. The beach and the lower part of the shore, below that level, were eroded each year. The heaviest surges resulted in an average 5.2 m and 7.0 m dune retreat on the high-beach-accumulative shore and on the low-beach-erosive shore, respectively. The dune was not eroded when the beach height exceeded the wave run-up. The heaviest surges eroded away 12–14 m3 of the beach sand volume. The shore erosion was found to be related to the storm surge duration, the maximum SL, the run-up and the beach height prior to the surge.
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