Wyniki wyszukiwania - BazTech

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Przeciwerozyjne zabezpieczenie wybrzeży – innowacyjny komórkowy system z siatki z drutu stalowego i porównanie jego śladu węglowego z innymi systemami

Denk Matthias

Nowoczesne Budownictwo Inżynieryjne

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2022

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Nr 6

72--76

PL

Liczne linie brzegowe Europy erodują. Szacuje się, że z prawie 17,6 tys. km linii brzegowej Wielkiej Brytanii problem erozji dotknie co najmniej 3 tys. km. Ok. 2,3 tys. km brytyjskiej linii brzegowej jest chronionych sztucznie. W wielu krajach europejskich, takich jak Norwegia, Grecja, Włochy, Chorwacja, Dania (z Grenlandią włącznie) i Polska, erozja morska i sztuczne zabezpieczenie brzegów stanowią kluczowy problem dla społeczności lokalnych, polityków, badaczy i planistów.

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Effects of human activities in the coastal zone of Laizhou Bay

Wang Min, Han Mei, Hui Hongkuan, Li Yunlong

Ecological Chemistry and Engineering. S

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2021

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Vol. 28, nr 2

219--227

EN

The serious destruction of resources and environment in Laizhou Bay has attracted extensive attention of researchers. This study mainly analysed the changes of fish structure and environment in the coastal zone of Laizhou Bay caused by human activities. By consulting literatures and field measurements, the changes of dominant fish species, coastline and sea water intrusion were analysed. The results showed that dominant fish species in Laizhou Bay change from high-economic species to low-economic species under the influence of human activities, and the coastline erosion was serious, and the area of sea water intrusion was also increasing year by year. It is concluded from the research results that human activities had a significant impact on the structure of fish school and the environment. It is necessary to arrange human activities in an appropriate amount to reduce the overexploitation of resources in order to restore the fishery resources and environment in Laizhou Bay.

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Texture and composition of the Rosa Marina beach sands (Adriatic coast, southern Italy): a sedimentological/ecological approach

Moretti M., Tropeano M., van Loon A. J., Acquafredda P., Baldacconi R., Festa V., Lisco S., Mastronuzzi G., Moretti V., Scotti R.

Geologos

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2016

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Vol. 22, No. 2

87--103

EN

Beach sands from the Rosa Marina locality (Adriatic coast, southern Italy) were analysed mainly microscopically in order to trace the source areas of their lithoclastic and bioclastic components. The main cropping out sedimentary units were also studied with the objective to identify the potential source areas of lithoclasts. This allowed to establish how the various rock units contribute to the formation of beach sands. The analysis of the bioclastic components allows to estimate the actual role of organisms regarding the supply of this material to the beach. Identification of taxa that are present in the beach sands as shell fragments or other remains was carried out at the genus or family level. Ecological investigation of the same beach and the recognition of sub-environments (mainly distinguished on the basis of the nature of the substrate and of the water depth) was the key topic that allowed to establish the actual source areas of bioclasts in the Rosa Marina beach sands. The sedimentological analysis (including a physical study of the beach and the calculation of some statistical parameters concerning the grain-size curves) shows that the Rosa Marina beach is nowadays subject to erosion.

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Baltic Sea coastal erosion; a case study from the Jastrzębia Góra region

Uścinowicz G., Kramarska R., Kaulbarsz D., Jurys L., Frydel J., Przezdziecki P., Jegliński W.

Geologos

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2014

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Vol. 20, No. 4

259--268

EN

The coastline in the Jastrzębia Góra area can be divided into three major zones of general importance: a beach and barrier section, a cliff section, and a section protected by a heavy hydrotechnical construction. These areas are characterised by a diverse geology and origin, and hence different vulnerability to erosion. In addition, observations have demonstrated a different pace of erosion within each zone. Based on the results obtained by remote sensing methods (analysis of aerial photographs and maps), it has been determined that the coastline in the barrier area, i.e., to the west of Jastrzębia Góra, moved landwards by about 130 m, in a period of 100 years, and 80 m over about 50 years. A smaller displacement of the shoreline could be observed within the cliff. Between the middle of the twentieth and the start of the twenty-first centuries the shore retreated by about 25 m. However, in recent years, an active landslide has led to the displacement of the uppermost part of the cliff locally up to 25 m. Another issue is, functioning since 2000, a heavy hydrotechnical construction which has been built in order to protect the most active part of the cliff. The construction is not stable and its western part, over a distance of 50 m, has moved almost 2 m vertically downwards and c. 2.5 m horizontally towards the sea in the past two years. This illustrates that the erosional factor does not comprise only marine abrasion, but also involves land-based processes determined by geology and hydrogeology. Changes in the shoreline at the beach and barrier part are constantly conditioned by rising sea levels, the slightly sloping profile of the sea floor and low elevation values of the backshore and dune areas. Cliffs are destroyed by mass wasting and repetitive storm surges that are responsible for the removal of the colluvium which protects the coast from adverse wave effects. Presumably, mass movements combined with groundwater outflow from the cliff, plus sea abrasion cause destabilisation of the cliff protection construction.