Informacja

Drogi użytkowniku, aplikacja do prawidłowego działania wymaga obsługi JavaScript. Proszę włącz obsługę JavaScript w Twojej przeglądarce.

Wyszukujesz frazę "erosion of the coastal zone" wg kryterium: Wszystkie pola


Wyświetlanie 1-8 z 8
Tytuł:
Zmiany rzeźby klifu w rejonie Ustki jako efekt warunków litologicznych oraz procesów ekstremalnych i przeciętnych
Lithological and extreme event control of changes in cliff morphology in the Ustka region
Autorzy:
Florek, W.
Kaczmarzyk, J.
Majewski, M.
Olszak, I. J.
Powiązania:
https://bibliotekanauki.pl/articles/294873.pdf
Data publikacji:
2008
Wydawca:
Stowarzyszenie Geomorfologów Polskich
Tematy:
abrazja
klif
wybrzeże południowego Bałtyku
strefa brzegowa
litologia
abrasion
erosion
cliff
South Baltic coast
coastal zone
lithology
Opis:
Od ponad ośmiu lat autorzy prowadzą badania, których celem jest określenie tempa zmian klifu i plaży w cyklach sezonowych i w wieloleciu, z uwzględnieniem roli ekstremalnych zjawisk hydrodynamicznych. Do celów prowadzonych prac należy także zaliczyć weryfikację dotychczasowych poglądów na temat znaczenia poszczególnych czynników decydujących o tempie i charakterze zmian nadbrzeża (budowa geologiczna, warunki hydrodynamiczne, czynniki antropogeniczne i in.). Autorzy realizują swoje cele badawcze głównie poprzez pomiary geodezyjne wybranych profili klifowych, a także rozpoznanie budowy geologicznej klifów, rejestrację mezo- i mikroform klifowych i plażowych oraz analizę danych meteorologicznych i hydrologicznych. Obserwacje autorów wskazują, że procesy abrazji i procesy masowe nie „konkurują” ze sobą w formowaniu strefy nadbrzeża, a tworzą swoistą sekwencję, w której abrazja związana ze sztormami i wysokimi stanami morza prowadzi do „wystromienia” klifu, zaś rola procesów stokowych (obrywania, osypywania i osuwania) ujawnia się w okresach bezsztormowych i prowadzi do „wygładzenia” profilu klifu. Stwierdzono też, że duże sztormy, które wystąpiły późną jesienią 2004 r., a także w sezonach 2005/06 i 2006/07, wpłynęły na uaktywnienie klifów w dziewięciu z dziesięciu badanych profili, jednak zakres zaobserwowanej abrazji jest dużo mniejszy od oczekiwanego.
Monitoring of cliff cross profile changes in the Ustka area have been carried out by the authors for more than 8 years. The aim of the project has been to verify the validity of the model suggested by different authors before, who described patterns of cliff development in the area. For example, certain observations on the South Baltic cliffs have led to the preliminary conclusion that the role played by geological conditions and related hydrogeological features in differentiating rates of cliff evolution is more important than assumed so far. The measurements in the controlled cliff profiles have yielded the following results: – beaches are the most dynamic areas in the onshore part. They undergo periodical changes, accreting from spring to summer and being eroded in autumn and winter; – upper sections of the cliffs, typically built of aeolian sand, are least resistant. Hence, they are subject to mass movement, particularly in summer, under impact of vacationers. As a consequence, sandy taluses and aprons form in the depositional area near the cliff base; – toes of landslide tongues in Poddąbie and Dębina are now being progressively abraded. The slide in Dębina was reactivated during winter seasons 2005/2006 and 2006/2007, causing further enlargement of the landslide niche; – after extreme storms beach accretion takes place in coastal sections located eastward from the most abraded cliffs, e.g. between Rowy and Czołpino, east from the landslide-affected areas at Poddąbie and Dębina. In the 2005–2007 period a significant increase in beach width has been observed. Nevertheless, it is difficult to offer serious conclusions at this stage, particularly because a series of big storms has not occurred recently. Detailed measurements described in this paper will be supplemented by detailed analysis of the geological structure of cliffs and of geomorphology and geology in offshore area.
Źródło:
Landform Analysis; 2008, 7; 53-68
1429-799X
Pojawia się w:
Landform Analysis
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The impact of Klaipeda Port entrance channel dredging on the dynamics of coastal zone, Lithuania
Autorzy:
Zilinskas, G.
Janusaite, R.
Jarmalavicius, D.
Pupienis, D.
Powiązania:
https://bibliotekanauki.pl/articles/2079089.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:
Klaipeda Port
Southern Baltic
Lithuania
entrance channel
dredging
coastal zone
sediment transport
lithodynamic condition
coastal erosion
Opis:
Dredging entrance channels to ports on open littoral drift seashores often causes major morphological changes to the shoreline. This study aims to assess the impact of dredging the Port of Klaipėda's entrance channel and the construction of the jetties on the coastal zone. Based on an analysis of cartographic material collected between 1835 and 2017, and on field data (bathymetric surveys and cross-shore profile levelling), changes to the coastal zone in the area nearest to the port were evaluated. The dominant longshore sediment transport on the Lithuanian nearshore runs from south to north. Thus, based on established patterns, intensive accretion could have been expected to take place on the southern side of the port jetties and erosion on their northern side. However, in the case of the Port of Klaipėda, in the area nearest to the port on the updrift side of the port jetties, where accretion would have been expected to take place, the nearshore depth increased throughout the 20th century (when the length and configuration of the jetties did not change). The shoreline shifted landward instead of moving further out to sea. The present study shows that the intensive dredging of the entrance channel caused nearshore and shore erosion on the updrift side of the port jetties, even while a sufficient sediment load was being transported by the longshore drift.
Źródło:
Oceanologia; 2020, 62, 4PA; 489-500
0078-3234
Pojawia się w:
Oceanologia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Remote-sensing observations of coastal sub-mesoscale eddies in the South-Eastern Baltic
Autorzy:
Gurova, E.
Chubarenko, B.
Powiązania:
https://bibliotekanauki.pl/articles/47699.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:
remote sensing
submesoscale eddy
coastal zone
Baltic Sea
MODIS satellite image
ASAR satellite image
orography
bottom topography
erosion
oil-field platform
turbidity
coastal water
coloured dissolved organic matter
Źródło:
Oceanologia; 2012, 54, 4
0078-3234
Pojawia się w:
Oceanologia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Polish coastal zone erosion in the aspect of need for coastal defence
Autorzy:
Zawadzka, E.
Powiązania:
https://bibliotekanauki.pl/articles/1920421.pdf
Data publikacji:
1999
Wydawca:
Instytut Morski w Gdańsku
Tematy:
coastline
erosion
coastal defence
Opis:
The balance of changes of the position of the coastline and of land area changes, made for the period 1875-1979, and of changes of the waterline and dune/cliff foot line for the period 1960-1983, has shown that in the last decades erosional processes are steadily increasing. At present 22% ( 110 km) of the Polish coastline is protected by structures. The growing rates of erosion, and the widening reach of damages, indicate that coastal protection works should be intensified and/or the hitherto used method should be verified.
Źródło:
Biuletyn Instytutu Morskiego w Gdańsku; 1999, 26, 2; 49-55
1230-7424
2450-5536
Pojawia się w:
Biuletyn Instytutu Morskiego w Gdańsku
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Hydraulic analysis of causes of washout of Gdynia-Orłowo sea-shore during the flood in the Kacza river estuary
Autorzy:
Szydłowski, Michał
Powiązania:
https://bibliotekanauki.pl/articles/258872.pdf
Data publikacji:
2019
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
hydrodynamics
flood
erosion of the coastal zone
Kacza river
Gdynia
Opis:
In July 2016 in the Three-city agglomeration a rainfall episode of over a day duration and 150 mm summary rainfall height, occurred. This situation, extreme as for Polish conditions, caused significant freshets in rivers and streams running into Gdansk Bay, the Baltic Sea, and serving as collectors of rainfall waters for the sea-coast towns. In many areas of the Three-city flood phenomena and overflows took place. The flood also occurred in the catchment area of the Kacza river in Gdynia. The passing of flood water rise caused damage of many infrastructure objects located along the river valley. The estuary section of the river suffered most, especially sea-shore belt together with beach around the estuary which were significantly washed out. In this paper an approach was made to answer to the question on direct causes of the situation which occurred at the estuary of the Kacza river. To this end, there was worked out a hydrodynamic model of the considered section of the river, based on the solving of two-dimensional differential motion equations of free-surface liquid, and simulations of water flow propagation along the river’s valley were performed for a few variants of hydraulic engineering infrastructure of river bed. Numerical hydraulic analysis made it possible to determine a role of the hydraulic engineering objects in forming the flood water rise as well as their impact on location and range of washout zones of sea-shore belt.
Źródło:
Polish Maritime Research; 2019, 1; 174-182
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effects of geomorphological processes and phytoclimate conditions change on forest vegetation in the Pomeranian Bay coastal zone (Wolin National Park, West Pomerania)
Autorzy:
Tylkowski, Jacek
Paluszkiewicz, Renata
Winowski, Marcin
Czyryca, Paweł
Kostrzewski, Andrzej
Mazurek, Małgorzata
Rachlewicz, Grzegorz
Powiązania:
https://bibliotekanauki.pl/articles/52495795.pdf
Data publikacji:
2023
Wydawca:
Uniwersytet im. Adama Mickiewicza w Poznaniu
Tematy:
forest vegetation
cliff edge zone
erosion and denudation processes
phytoclimatic conditions
Pomeranian Bay
Wolin Island
Opis:
The functioning of plant associations, including forest associations, in the coastal cliff edge zone of the Pomeranian Bay in the Wolin National Park (WNP) is determined by short-term factors related to the dynamics of erosion and denudation processes and long-term phytoclimatic conditions’ changes. The study presents a temporary analysis of the occurrence of sea abrasion and water and aeolian erosion, based on the applied hydrometeorological threshold values. The influence of changes in phytoclimatic conditions on the development and productivity of coastal forests with the dominant species of Fagus sylvatica was also presented. Assessments of spatial susceptibility to erosion of the cliff coast and the existing plant associations were also carried out in conditions of the risk of coast erosion. It was found that 55% of the cliff edge zone of the Pomeranian Bay of the WNP and the forest associations (mainly Luzulo pilosae-Fagetum) occurring there are in the zone of particular risk of increased erosion and denudation processes. In addition, unfavourable trends in changes in phytoclimatic conditions in the 21st century were found, which reflect climate changes unfavourable to the development of beech forests on Wolin Island.
Źródło:
Quaestiones Geographicae; 2023, 42, 1; 141-160
0137-477X
2081-6383
Pojawia się w:
Quaestiones Geographicae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Basic for a valuation of the Polish Exclusive Economic Zone of the Baltic Sea: Rationale and quest for tools
Autorzy:
Weslawski, J.M.
Andrulewicz, E.
Kotwicki, L.
Kuzebski, E.
Lewandowski, A.
Linkowski, T.
Massel, S.R.
Musielak, S.
Olanczuk-Neyman, K.
Pempkowiak, J.
Piekarek-Jankowska, H.
Radziejewska, T.
Rozynski, G.
Sagan, I.
Skora, K.E.
Szefler, K.
Urbanski, J.
Witek, Z.
Wolowicz, M.
Zachowicz, J.
Zarzycki, T.
Powiązania:
https://bibliotekanauki.pl/articles/47570.pdf
Data publikacji:
2006
Wydawca:
Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:
marine environment
erosion
mineral resource
biofiltration
Polish Exclusive Economic Zone
economic valuation
Baltic Sea
ecosystem
marine ecosystem
coastal sand
fish resource
Opis:
This paper summarises current knowledge of goods and services in the Polish Exclusive Economic Zone of the Baltic Sea ecosystem. It reviews specific properties of the Baltic that could be used for economic valuation. Goods and services range from the familiar resources of fish and minerals, which were valued with the Productivity Method, to less obvious services provided by the ecosystem such as biofiltration in coastal sands, valued with either the Replacement Cost or Damage Cost Avoided methods. Disservices to the marine ecosystem are also considered, e.g. erosion and coastal flooding, including the costs of planned mitigating measures. This paper emphasises the importance of using valuation methods to help make better-educated decisions for the sustainability of the Baltic Sea.
Źródło:
Oceanologia; 2006, 48, 1
0078-3234
Pojawia się w:
Oceanologia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of Dune Erosion on the Coast of South Baltic Sea Taking into Account Dune Landslide Processes
Autorzy:
Szmytkiewicz, P.
Zabuski, L.
Powiązania:
https://bibliotekanauki.pl/articles/240996.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Instytut Budownictwa Wodnego PAN
Tematy:
South Baltic coastal zone
dunes
erosion
landslide process
Opis:
An analysis was carried out to determine the influence of landslide process at a few meters depth under the dune surface on the rebuilding of the dune. In the first step, calculations were done using the XBEACH model to determine seabed rebuilding as well as shore and dune undercutting for the assumed hydrologic and hydrodynamic conditions. Next, the obtained tachymetric profile of the dune and beach was fed into the FLAC2D program, and calculations of stress distribution, displacements and stability conditions were made. In this way, landslide movement was identified. The theoretical investigations clearly prove that waves attacking the dune not only cause surface erosion, but also trigger a landslide within the dune mass to a maximum depth of about 5 m. It results in a lowering of the dune crown by about 0:6 0:7 m. Numerical models such as XBEACH, SBEACH or CSHORE do not take into account landslide occurrence, and thus underestimate dune erosion.
Źródło:
Archives of Hydro-Engineering and Environmental Mechanics; 2017, 64, 1; 3-15
1231-3726
Pojawia się w:
Archives of Hydro-Engineering and Environmental Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-8 z 8

    Ta witryna wykorzystuje pliki cookies do przechowywania informacji na Twoim komputerze. Pliki cookies stosujemy w celu świadczenia usług na najwyższym poziomie, w tym w sposób dostosowany do indywidualnych potrzeb. Korzystanie z witryny bez zmiany ustawień dotyczących cookies oznacza, że będą one zamieszczane w Twoim komputerze. W każdym momencie możesz dokonać zmiany ustawień dotyczących cookies