Temat: coastal sediment - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Spatial and temporal distribution of heavy metals in coastal core sediments from the Red Sea, Saudi Arabia
Autorzy:: Al-Mur, B.A.
Quicksall, A.N.
Al-Ansari, A.M.A.
Powiązania:: https://bibliotekanauki.pl/articles/48599.pdf
Data publikacji:: 2017
Wydawca:: Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:: Red Sea
Saudi Arabia
heavy metal
spatial distribution
temporal distribution
pollution
coastal sediment
sediment core
Opis:: Jeddah is the most industrialized city on the west coast of Saudi Arabia and is under increasing influence of human activities. Heavy metals data were obtained from four near-coast Red Sea sediment cores in close proximity to Jeddah. Chromium, manganese, iron, copper, zinc, and lead were analyzed from depth-resolved sections of each core via heavy acid digestion and inductively coupled plasma-mass spectrometry (ICP-MS). The average concentrations of all four sites were 245.96 mg kg1, 478.45 mg kg1, 8506.13 mg kg1, 251.82 mg kg1, 623.09 mg kg1, and 362.75 mg kg1, respectively. The depth-resolved results showed that highest concentrations of Mn, Cu, and Pb were found in the top 15 cm of the core profile distributions compared to other depth sub-samples. Heavy metal concentrations in core sediments are increased near central Jeddah and have become higher in recent years. The results of enrichment factor calculations indicate little anthropogenic supply of Mn and Cr while Pb, Zn, and Cu show strong anthropogenic input. The Pollution Load Index was higher in the two sites closer to central Jeddah where power and desalination plants and wastewater release are known. This indicates that the area has suffered from heavy metal pollution compared to other non-industrialized sites in the Red Sea. Heavy metal contaminations due to anthropogenic activity should be taken into account to protect the Red Sea during future growth. The results of this work should be considered as a baseline for heavy metals monitoring in the sediments of the Red Sea coast near Jeddah, Saudi Arabia.
Źródło:: Oceanologia; 2017, 59, 3
0078-3234
Pojawia się w:: Oceanologia
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Dinoflagellate cyst distribution in recent sediments along the South-East coast of India
Autorzy:: Narale, D.D.
Patil, J.S.
Anil, A.C.
Powiązania:: https://bibliotekanauki.pl/articles/47651.pdf
Data publikacji:: 2013
Wydawca:: Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:: dinoflagellate cyst
distribution
coastal sediment
India coast
plankton community
marine ecosystem
algal bloom
phytoplankton
Źródło:: Oceanologia; 2013, 55, 4
0078-3234
Pojawia się w:: Oceanologia
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Limitation of lignin derivatives as biomarkers of land derived organic matter in the coastal marine sediments
Autorzy:: Pempkowiak, J.
Powiązania:: https://bibliotekanauki.pl/articles/2079190.pdf
Data publikacji:: 2020
Wydawca:: Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:: lignin oxidation
biomarker
stable carbon isotope
nonlinear analysis
Gdansk Bay
Southern Baltic Sea
coastal sediment
Opis:: Lignin oxidation products (vanillyl, syringil and cummaryl phenols), and δ13C were measured in a variety of land and marine samples collected in Inner Puck Bay – dominated by marine vascular plants, small river run-off, and shallow bottom, and in Gdańsk Bay – characterized by large river run-off, small marine vascular plants population, and the average depth exceeding euphotic zone. Both study areas are parts of the Gdańsk Basin, Southern Baltic. Typical δ13C values (δ13C = -28‰) and both composition and concentrations of lignin phenols were measured in samples originating from land. Small, yet easily measurable amounts of lignin phenols were found in marine vascular plants biomass (Σ8 = 90 µg/100 mg organic matter). The biomass was characterized by exceptionally high δ13C values (-12‰). No lignin phenols and typical δ13C values (-22‰) were measured in marine phytoplankton biomass. δ13C and both composition and content of lignin phenols in organic matter of surface sediments collected in the study area fall in the range marked by the end members. The proportion of land derived organic matter calculated using lignin phenols, or δ13C in Gdańsk Bay were comparable, while in Puck Bay they differed substantially. It was concluded that a) in areas with substantial bottom coverage with vascular plants the two end members approach, usually employed to establish the contribution of organic matter sources, is insufficient, b) organic matter originating from three sources: riverine, phytoplankton, and vascular plants contribute to sedimentary organic matter in Puck Bay with the respective proportion 30:40:30.
Źródło:: Oceanologia; 2020, 62, 3; 374-386
0078-3234
Pojawia się w:: Oceanologia
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Application of two coastal profile evolution models to Lubiatowo, Poland and La Barrosa, Spain
Autorzy:: O'Hare, T. J.
Ostrowski, R.
Emsley, S. M.
Huntley, D. A.
Powiązania:: https://bibliotekanauki.pl/articles/240970.pdf
Data publikacji:: 2006
Wydawca:: Polska Akademia Nauk. Instytut Budownictwa Wodnego PAN
Tematy:: beach
coastal profile model
hydrodynamics
sediment transport
Opis:: Two contrasting coastal profile models are applied to three bathymetries including a uniform gradient beach and natural profiles (multi-barred and multi-stepped) obtained from Lubiatowo, Poland and La Barrosa, Spain. The first model, developed at the Institute of Hydro-Engineering of the Polish Academy of Science (IBW PAN) (Poland), couples a quasi-3D model for nearshore hydrodynamics with a quasi-phase resolving sediment transport model which considers transport in the bed load, contact load and outer layers. The second model (PLYMPROF), developed at the University of Plymouth (UK), couples a relatively simple wave transformation model with a new abstracted description of cross-shore sediment transport beneath waves. A variety of model simulations are described, including simple runs with uniform wave forcing (up to 50 days in duration using PLYMPROF) and runs with parameterized wave forcing (wave height and wave period in deep water) for periods with one or two storm events (6-11 days total duration). Both models coped well with the different initial profiles and with uniform and time-varying wave conditions. The results of the simulations suggest that onshore-directed sediment transport in the shoaling and outer surf zones is dominant for the cases considered. Compared to the IBW PAN model, the PLYMPROF model results (using coefficients from a separate study of bar evolution at Duck, USA) show larger offshore-directed transport in the inner surf zone associated with return flow, with the overall sediment transport pattern located considerably closer to the shore. Alteration of a single coefficient in the PLYMPROF model shifts the predicted transport pattern seawards, but also results in enhanced offshore-directed transport. Despite differences in predicted cross-shore sediment transport the two models produced surprisingly similar trends in overall profile evolution suggesting that feedback between existing bathymetry and the sediment transport pattern may exert a major control on profile development. Results also suggested that bar migration patterns cannot be simply related to the occurrence or absence of storm conditions, but rather depend more subtly on the exact placement of wave breaking locations in relation to existing bars. Incorporation of tidal water level variations for La Barrosa produced small changes in model predictions, with tidal migration of the sediment flux pattern suppressing the development of bar morphology in line with the form of the observed profile.
Źródło:: Archives of Hydro-Engineering and Environmental Mechanics; 2006, 53, 3; 235-266
1231-3726
Pojawia się w:: Archives of Hydro-Engineering and Environmental Mechanics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Relationships between coastal processes and properties of the nearshore sea bed dynamic layer
Autorzy:: Ostrowski, R.
Pruszak, Z.
Powiązania:: https://bibliotekanauki.pl/articles/47468.pdf
Data publikacji:: 2011
Wydawca:: Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:: Baltic coast
Baltic dune
cliff
coastal process
coastal zone
geomorphological condition
hydrodynamic impact
Polska
sandy sediment
sediment transport
Opis:: The paper discusses the notion of a layer of sandy sediments overlying a substratum of cohesive deposits in the coastal zone. This layer of sand is generally more mobile and is therefore conventionally referred to as the dynamic layer. Its parameters are important to coastal lithodynamic and morphodynamic processes caused by waves and currents. On the other hand, the dynamic layer is formed by nearshore hydrodynamic impact. The variability of the features of the dynamic layer on the southern Baltic dune and cliff shores in Poland is analysed on the basis of selected geological data supported by local seismo-acoustic field investigations. It appears that the conventional notion of the dynamic layer makes sense only in specific geomorphologic conditions. In such cases, mostly related to cliff shores, theoretical modelling of sediment transport should take the properties of the dynamic layer into account.
Źródło:: Oceanologia; 2011, 53, 3
0078-3234
Pojawia się w:: Oceanologia
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Geochemistry of surface sediments of a coastal Lake Sarbsko (northern Poland)
Autorzy:: Woszczyk, Michał
Cieśliński, Roman
Spychalski, Waldemar
Powiązania:: https://bibliotekanauki.pl/articles/2026076.pdf
Data publikacji:: 2009
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: coastal lake
lake sediment geochemistry
Gardno-Łeba Coastal Plain
southern Baltic
Polska
Opis:: The main goal of the pre sented re search was to in ves ti gate spa tial dis tri bu tion of sur face sed i ments and to rec og nize re la tion ships be tween chem i cal com po si tion of wa ter and sed i ments in a coastal Lake Sarbsko (north ern Po land). The Lake Sarbsko is a fresh wa ter ba sin. The wa ter col umn is well ox y gen ated and wa ters ex hibit only mi nor spa tial vari - abil ity of chem i cal com po si tion in di cat ing rapid and good mix ing. Sur face sed i ments of Lake Sarbsko are strongly di - ver si fied with re spect to chem i cal com po si tion. The sed i ments of Lake Sarbsko are char ac ter ized by el e vated con tent of terrigenous sil ica in di cat ing en hanced in put of clastic ma te rial from the wa ter shed and/or in creased dy nam ics of the lake wa ters. More over, SiO2ter is strongly neg a - tively cor re lated with SiO2biog, or ganic mat ter and el e ment con tents, which ar gues for di lut ing ef fect of the for mer to - wards authigenic com po nents of sed i ments. Ba si cally, terrigenous sil ica (quartz) con tent is high est in the lake shores and de clines to wards the lake cen ter. Biogenic sil ica, or ganic mat ter and most of el e ments dis play re versed ten dency. CaCO3 was en coun tered in three iso lated ar eas, where it co-oc curs with FeS. It is an tic i pated that pre cip i ta tion of cal - cite in Lake Sarbsko re sulted from postdepositional pro cesses. Spa tial dis tri bu tion of Fe, Mn, Ca, Mg, Na and K in Lake Sarbsko is also gov erned by their geo chem i cal af fin i ties to or ganic mat ter (Fe), Fe/Mn ox ides (Fe, Mn), sulphides (Fe), clay min er als (Na, K, Mg, Mn) and car bon ates (Ca, Mn).
Źródło:: Studia Quaternaria; 2009, 26; 41-53
1641-5558
2300-0384
Pojawia się w:: Studia Quaternaria
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: Modelling longshore sediment transport under asymmetric waves
Autorzy:: Ostrowski, R.
Szmytkiewicz, M.
Powiązania:: https://bibliotekanauki.pl/articles/49027.pdf
Data publikacji:: 2006
Wydawca:: Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:: coastal zone
hydrodynamic condition
sandy sediment
wave-current interaction
sediment transport
wave asymmetry
Opis:: Two wave theories are applied in calculations of longshore sediment transport rates: the second Stokes approximation and the cnoidal theory. These approaches are used to model sand motion in nearshore locations beyond and within the surf zone. Wave-current interaction in the nearbed layer and bed shear stresses are solved using a momentum integral method, whereas sediment transport is described by a three-layer model encompassing bedload, contact load and suspended load. Computational results for asymmetric waves are compared with the results obtained using linear wave theory and the conventional sediment transport models of Bailard (1981), Bijker (1971) and Van Rijn (1993).
Źródło:: Oceanologia; 2006, 48, 3
0078-3234
Pojawia się w:: Oceanologia
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: Driving forces of sandy sediment transport beyond the surf zone
Autorzy:: Stella, M.
Ostrowski, R.
Szmytkiewicz, P.
Kapinski, J.
Marcinkowski, T.
Powiązania:: https://bibliotekanauki.pl/articles/47878.pdf
Data publikacji:: 2019
Wydawca:: Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:: sandy sediment
sediment transport
surf zone
wave-current interaction
roughness
coastal zone
Baltic Sea
Źródło:: Oceanologia; 2019, 61, 1
0078-3234
Pojawia się w:: Oceanologia
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: Chromium Accumulation by Avicennia alba Growing at Ecotourism Mangrove Forest in Surabaya, Indonesia
Autorzy:: Titah, Harmin Sulistiyaning
Pratikno, dan Herman
Powiązania:: https://bibliotekanauki.pl/articles/124450.pdf
Data publikacji:: 2020
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: Avicennia alba
BCF
coastal area
chromium
mangrove forest
root
sediment
Opis:: The Ecotourism Mangrove Forest at Wonorejo in East Coast Surabaya area is one of large mangrove forests inside in the metropolitan city in Indonesia. There are many ecological values of the mangrove forest in most tropical countries such as sea fisheries, place of sea and coastal animals, sea and brackish water quality protecting the endangered mangrove coastlines and development of human life. The role of mangrove in increasing the sea and brackish water quality can be shown through many processes such as cycling of nutrients, particulate matter and some pollutants in water and sediment around the mangrove plants. One of the inorganic pollutants that can be removed by mangrove are heavy metals, such as chromium (Cr). The Wonorejo River is one of the rivers that receive the disposal of wastewater in Surabaya East Coast area. Large quantitites of wastewater from industries and households were released to this river. The concentration of Cr at the Wonorejo Estuary reached 0.0325 mg/L and 2.7761 mg/L in sediments. The purpose of this research was to determine the potency of Cr accumulation by Avicennia alba that was grown for ten years at Wonorejo Ecotourism Mangrove Forest. The sampling activities were conducted using a transect quadrat sampling method with a 10x10 m dimension. The sediment and mangrove root samples were extracted before being analysed using an atomic absorption spectrophotometer (AAS). The results showed that the Cr accumulation by roots of A. alba reached 25.4 ± 1.6 to 55.3 ± 1.1. The BCF value in A. alba were 0.32 ± 0.01 to 0.83 ± 0.5 with the concentration Cr in sediment were 60 ± 1.4 to 79.3 ± 1.1. A. alba showed potential as a moderate accumulator for Cr. In conclusion, A. alba can be considered for use in phyto-monitoring and phytoremediation of Cr in coastal areas.
Źródło:: Journal of Ecological Engineering; 2020, 21, 2; 222-227
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

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

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Skocz do pozycji: 11.

Tytuł:: Natural radioactivity of coastal sediments as tracer in dynamic sedimentology
Autorzy:: Thereska, J.
Powiązania:: https://bibliotekanauki.pl/articles/146496.pdf
Data publikacji:: 2009
Wydawca:: Instytut Chemii i Techniki Jądrowej
Tematy:: gamma natural radioactivity
coastal sediments
natural tracer
lithology
sediment dynamics
Opis:: Natural radioactivity of coastal sediments could provide interesting information on sediment dynamics. Natural radioactivity measurements were performed in two areas of the Adriatic Sea littoral of Albanian cost, in the gulfs of Durres and Vlora, where complex studies were carried out in the framework of the maintenance of existing Durres harbour and the design of a new harbour in Vlora. Dynamic mapping of the gamma total radioactivity at the sea bottom sediment was carried out using a 2" × 2" NaI probe. Radiometric data were converted to lithological map, and the sand and silt distribution configuration was interpreted in terms of sediment transport. The obtained results have shown that the natural radioactivity of sediments provides qualitative data about the sediment dynamics. This cost-effective method is recommended to be used as complementary to other tracer techniques for sediment transport in coastal engineering investigations.
Źródło:: Nukleonika; 2009, 54, 1; 45-50
0029-5922
1508-5791
Pojawia się w:: Nukleonika
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 12.

Tytuł:: Modelling nearshore hydrodynamics and circulation under the impact of high waves at the coast of Varkiza in Saronic-Athens Gulf
Autorzy:: Belibassakis, K.A.
Karathanasi, F.E.
Powiązania:: https://bibliotekanauki.pl/articles/47934.pdf
Data publikacji:: 2017
Wydawca:: Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:: sediment transport
shoreline
modelling
hydrodynamics
Saronic Gulf
coastal zone
wind
wave
Opis:: A plethora of physical parameters, such as hydro-, litho- and morpho-dynamic char- acteristics, are essential for understanding the response of coastal systems to intense sea states in terms of sediment transport and shoreline evolution. Nowadays, numerical models are extensively applied to meet the above needs and support coastal planning and management. In the present work, a 2DH dynamic modelling system is used for simulating the hydrodynamic and meteorological/ oceanographic characteristics of the Saronic Gulf, in order to examine circulation patterns and predict sediment transport phenomena under high wave conditions at the coast of Varkiza, a sandy beach in the southern Attica, Greece. Time series of wind and wave data were used as input at the open boundaries of the model domain while the model was calibrated and validated through (linear and directional) statistical measures with respect to in situ wave measurements, since there was lack of hydrodynamic data at the site of interest.The simulation period of the model was between January 3 and February 19, 2013, with consecutive high waves in-between. The good agreement of the numerical results from the wave and hydrodynamic model with in situ measurements confirmed the suitability of the model for the support of sediment transport rates at Varkiza coastal segment. Model results reveal that there is a counter-clockwise water circulation during high waves that contribute to the erosion of the examined beach, which is also confirmed by independent field measurements.
Źródło:: Oceanologia; 2017, 59, 3
0078-3234
Pojawia się w:: Oceanologia
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 13.

Tytuł:: Coastal processes of Central Tamil Nadu, India: clues from grain size studies
Autorzy:: Angusamy, N.
Rajamanickam, G.V.
Powiązania:: https://bibliotekanauki.pl/articles/48429.pdf
Data publikacji:: 2007
Wydawca:: Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:: depositional environment
Tamil Nadu
beach
grain size
India
sediment
coastal process
Opis:: The sediments of the beaches along the central coast of Tamil Nadu from Pondicherry to Vedaranyam were studied for their textural variation. 108 sediment samples collected from the low-, mid-, and high-tidal zones, as well as the berms and dunes of different beach morpho-units were analysed. The study area was divided into three sectors (northern, central and southern) on the basis of prevailing energy conditions and oceanographic parameters. The poorly sorted, negatively skewed, coarser sediments of the northern sector are indicative of denudational processes taking place there. Medium-to-fine, moderately-to-well sorted, positivesymmetrically skewed sediments dominate the central sector, probably as a result of the influence of palaeo-sediments deposited by rivers from inland as well as by waves and currents from offshore. Fine, poorly sorted, positive-symmetrically skewed sediments dominate the southern sector, highlighting depositional processes. Linear Discriminant Function Analysis (LDF) of the samples indicates a shallow marine environment origin for all the three sectors. These results show that reworked sediments, submerged during the Holocene marine transgression, are being deposited on present-day beaches by waves, currents and rivers in the study area.
Źródło:: Oceanologia; 2007, 49, 1
0078-3234
Pojawia się w:: Oceanologia
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 14.

Tytuł:: Influence of the climatic variations in the wind waves parameters on the alongshore sediment transport
Autorzy:: Divinsky, B.V.
Kosyan, R.D.
Powiązania:: https://bibliotekanauki.pl/articles/2079275.pdf
Data publikacji:: 2020
Wydawca:: Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:: climate variability
wind wave
coastal zone
sediment transport
numerical modelling
Black Sea
Opis:: The purpose of this work was to analyze the influence of climatic variability of wind waves and swell parameters in the coastal zone on the sediment transport and to assess the contribution of the swell to the formation of alongshore fluxes. The object of research is the Anapa bay-bar (the Black Sea). Mathematical modeling has shown that in the Anapa bay-bar area the average annual wind waves and swell powers have significant interannual variability. For the period from 1979 to 2017, in the southern part of the bay-bar, there was a statistically significant decrease in the share of swell in the alongshore transport, directed from NW to SE, in the central part – an increase in the contribution of swell to the total sediment flow from SE to NW, in the northern part – probable increase in flows to NW and decrease – to SE. Such a dynamic is consistent, in general, with experimental observations of the processes of erosion and accumulation of beach-forming material along the Anapa bay-bar coastline. A separate description of the bottom sediment fluxes under the influence of wind waves and swell made it possible to explain the fluctuations of the coastline over a climatic period.
Źródło:: Oceanologia; 2020, 62, 2; 190-199
0078-3234
Pojawia się w:: Oceanologia
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 15.

Tytuł:: Canthaxanthin in recent sediments as an indicator of heterocystous cyanobacteria in coastal waters
Autorzy:: Krajewska, M.
Szymczak-Zyla, M.
Kobos, J.
Witak, M.
Kowalewska, G.
Powiązania:: https://bibliotekanauki.pl/articles/47440.pdf
Data publikacji:: 2019
Wydawca:: Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:: Cyanoprokaryota
chlorophyll a
coastal water
carotenoid
chloropigment
canthaxanthin
Gdansk Gulf
Baltic Sea
recent sediment
Źródło:: Oceanologia; 2019, 61, 1
0078-3234
Pojawia się w:: Oceanologia
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 16.

Tytuł:: Tracking trends in eutrophication based on pigments in recent coastal sediments
Autorzy:: Szymczak-Zyla, M.
Krajewska, M.
Winogradow, A.
Zaborska, A.
Breedveld, G.D.
Kowalewska, G.
Powiązania:: https://bibliotekanauki.pl/articles/48555.pdf
Data publikacji:: 2017
Wydawca:: Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:: eutrophication
sea water property
pigment
marker
coastal area
sediment
chloropigment
Gdansk Gulf
Norwegian fjord
Opis:: Eutrophication in two different coastal areas — the Gulf of Gdańsk (southern Baltic) and the Oslofjord/Drammensfjord (Norway) — both subject to human pressure and with restricted water exchange with adjacent seas, was investigated and compared. Sediment cores (up to 20 cm long) were collected at 12 stations using a core sampler, 6 in each of the two areas, and divided into sub-samples. The physicochemical parameters characterizing the adjacent water column and near-bottom water, i.e. salinity, oxygen concentration and temperature, were measured during sample collection. Chlorophylls-a, -b and -c, their derivatives and selected carotenoids were determined for all the samples, as were additional parameters characterizing the sediments, i.e. Corg, Ntot, d13C and d15N, grain size. 210Pb activity was also determined and on that basis sediment mixing and accumulation rates were estimated. The distribution of pigments in sediments was related to environmental conditions, the sampling site location and sediment characteristics. The results are in agreement with other observations that eutrophication in the Gulf of Gdańsk has increased, especially since the 1970s, whereas in the Oslofjord it decreased during the same period. The pigments are better preserved in inner Oslofjord sediments than in those from the Gulf of Gdańsk. The results demonstrate that the sum of chloropigments-a insediments calculated per dry weight of sediments is a valuable measure of eutrophication, providing that the monitoring site is selected properly, i.e. sediments are hypoxic/anoxic and non-mixed. Besides, the results confirm previous observations that the percentages of particular chlorophyll-a derivatives in the sum of chloropigments-a are universal markers of environmental conditions in a basin. The ratios of chloropigments-b and chlorophylls-c to the sum of chloropigments-a (SChlns-b/ SChlns-a; Chls-c/SChlns-a) may by applied as complementary markers of freshwater and marine organic matter input, respectively.
Źródło:: Oceanologia; 2017, 59, 1
0078-3234
Pojawia się w:: Oceanologia
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 17.

Tytuł:: Prace pogłębiarskie w polskiej strefie przybrzeżnej – aktualne problemy
Dredging works in the polish coastal zone – actual problems
Autorzy:: Staniszewska, M
Boniecka, H.
Gajda, A.
Powiązania:: https://bibliotekanauki.pl/articles/949992.pdf
Data publikacji:: 2014
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: prace czerpalne
osad denny
polska strefa przybrzeżna
work of dredging
bottom sediment
Polish coastal zone
Opis:: Praca przybliża problemy związane z wydobywaniem urobku czerpalnego w polskie strefie przybrzeżnej oraz istniejące luki prawne w tym zakresie. Szczególnie naglącą sprawą jest opracowanie nowych aspektów prawnych w prawodawstwie polskim zawierających kryteria oceny stopnia zanieczyszczenia wydobywanego urobku, wyznaczania nowych klapowisk oraz zasad ich monitoringu. Autorzy opracowania skłaniają się też do rozwinięcia idei praktycznego wykorzystania urobku, w tym kryteriów do sztucznego zasilania brzegów.
The aim of this work is introducing the problems associated with the dredging of sediment in the Polish coastal zone and pointing no rules in Polish legislation in this regard. A particularly pressing issue is to develop a new legal aspects of Polish legislation containing the criteria for dredging material and principles for new locations of spoil dredging material in the sea and of their monitoring. The authors also tend to develop the idea of the practical use of dredging sediments, including the criteria for artificial supplement the deficit of sediments of the coastal zone.
Źródło:: Inżynieria Ekologiczna; 2014, 40; 157-172
2081-139X
2392-0629
Pojawia się w:: Inżynieria Ekologiczna
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 18.

Tytuł:: Chamelea gallina in the coastal waters of the Anapa bay bar (the Black Sea) as a carbonate sediment producer
Autorzy:: Kosyan, A.R.
Divinsky, B.V.
Powiązania:: https://bibliotekanauki.pl/articles/47884.pdf
Data publikacji:: 2019
Wydawca:: Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:: Chamelea gallina
biomass
population
shell length
coastal water
bivalve
carbonate sediment
Anapa Bay
Black Sea
Źródło:: Oceanologia; 2019, 61, 4
0078-3234
Pojawia się w:: Oceanologia
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 19.

Tytuł:: Longshore sediment transport at Golden Sands (Bulgaria)
Autorzy:: Nikolov, H.
Trifonova, E.
Cherneva, Z.
Ostrowski, R.
Skaja, M.
Szmytkiewicz, M.
Powiązania:: https://bibliotekanauki.pl/articles/48714.pdf
Data publikacji:: 2006
Wydawca:: Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:: coastal zone
wave refraction
wave diffraction
Black Sea
sandy beach
sediment transport
Golden Sands
Bulgaria
Opis:: The paper presents the results of studies on the qualitative and quantitative features of the littoral drift at Golden Sands (Bulgaria), carried out jointly by Polish and Bulgarian researchers. The mathematical modelling of physical coastal processes took wave transformation (wave diffraction and refraction; the effects of shoaling and wave breaking) and longshore sediment transport into account. The computations were carried out for the mean statistical annual wave climate, determined on the basis of IO BAS wave data, simulated using the WAM method from long-term Black Sea wind data. The results of sediment transport computations clearly show that its direction off the Golden Sands shore is from north to south.
Źródło:: Oceanologia; 2006, 48, 3
0078-3234
Pojawia się w:: Oceanologia
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 20.

Tytuł:: Spatio-temporal decay 'hot spots' of stranded wrack in a Baltic sandy coastal system. Part I. Comparative study of the pattern: 1 type of wrack vs 3 beach sites
Autorzy:: Jedrzejczak, M F
Powiązania:: https://bibliotekanauki.pl/articles/48627.pdf
Data publikacji:: 2002
Wydawca:: Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:: sediment composition
Zostera marina
sandy beach
coastal system
salinity
litter bag
Gdansk Gulf
decomposition
ANOVA test
Opis:: The significance of distance along the beach-dune transect and different moisture conditions as regards the decay of Zostera marina leaf litter was investigated in simple field experiments in three temperate, medium- to fine-quartz-sediment, sandy beaches of the Gulf of Gdańsk in Poland. 1800 replicate litterbags of freshly stranded Zostera marina leaves were placed in beach sediments at different strata and levels on each of the beaches. The litterbags were sampled after 5, 10, 50, 100 and 150 days in the field and the remaining material was then dried and weighed. Under similar conditions of sediment composition, salinity and wave inundation, ANOVA tests revealed significant differences in breakdown through time and site. Thus there were some differences in the decay process between the low and high beach. In the former, degradation proceeded rapidly in the initial stages and then stabilised, while in the latter it remained linear throughout the study period.Matter loss in each stratum was also seasonally dependent. This may, however, be more closely linked to successional changes in the chemistry and/or microflora of the beach wrack than to its physical breakdown. Differences between organic matter degradation in the high and low beaches may be explained by differences in the moisture regime and nutrient status, and not by differences in the decay processes themselves. Therefore, two decay centres were found in the beach-dune system: the low beach together with the strandline (wrack consumption 12–21 % day−1 in the warm season, and 4–10 % day−1 in the cold season) and the dune (active consumption 2–6 % day−1 in the warm season only).
Źródło:: Oceanologia; 2002, 44, 4
0078-3234
Pojawia się w:: Oceanologia
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 21.

Tytuł:: Microphytobenthic primary production on exposed coastal sandy sediments of the Southern Baltic Sea using ex situ sediment cores and oxygen optodes
Autorzy:: Kuriyama, K.
Grundling-Pfaff, S.
Diehl, N.
Woelfel, J.
Karsten, U.
Powiązania:: https://bibliotekanauki.pl/articles/2078927.pdf
Data publikacji:: 2021
Wydawca:: Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:: microphytobenthos
primary production
sandy sediment
coastal water
benthic diatom
oxygen consumption
oxygen production
respiration
hydrodynamics
Baltic Sea
Opis:: The shallow coastal water zone of the tide-less southern Baltic Sea is dominated by exposed sandy sediments which are typically inhabited by microphytobenthic communities, but their primary production is poorly studied, and hence four stations between 3.0 and 6.2 m depth were investigated. Sediment cores were carefully taken to keep the natural layering and exposed in a controlled self-constructed incubator. Respiratory oxygen consumption and photosynthetic oxygen production were recorded applying planar oxygen optode sensors. We hypothesized that with increasing water depths the effects of wind- and wave-induced erosion and mixing of the upper sediment layer are dampened and expected higher microphytobenthic biomass and primary production in the incubated cores. Our data partly confirm this hypothesis, as cores sampled at the most exposed stations contained only 50% chlorophyll a m−2 compared to the deeper stations. However, primary production was highly variable, probably due to fluctuating sediment-disturbing conditions before the cores were taken. Due to these physical forces sand grains were highly mobile and rounded, and small epipsamic benthic diatoms dominated, which preferentially occurred in some cracks and crevices as visualized by scanning electron microscopy. The data fill an important gap in reliable production data for sandy sediments of the southern Baltic Sea, and point to the ecological importance and relevant contribution of microphytobenthic communities to the total primary production of this marine ecosystem. Oxygen planar optode sensor spots proved to be a reliable, sensitive and fast detection system for ex situ oxygen exchange measurements in the overlying water of intact sediment cores.
Źródło:: Oceanologia; 2021, 63, 2; 247-260
0078-3234
Pojawia się w:: Oceanologia
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 22.

Tytuł:: The impact of tides and waves on near-surface suspended sediment concentrations in the English Channel
Autorzy:: Guillou, N.
Rivier, A.
Chapalain, G.
Gohin, F.
Powiązania:: https://bibliotekanauki.pl/articles/48548.pdf
Data publikacji:: 2017
Wydawca:: Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:: suspended sediment concentration
spatial variability
temporal variability
coastal water
English Channel
bathymetry
numerical modelling
ROMS model
MERIS data
Opis:: Numerous ecological problems of continental shelf ecosystems require a refined knowledge of the evolution of suspended sediment concentrations (SSC). The present investigation focuses on the spatial and temporal variabilities of near-surface SSC in coastal waters of the English Channel (western Europe) by exploiting numerical predictions from the Regional Ocean Modeling System ROMS. Extending previous investigations of ROMS performances in the Channel, this analysis refines, with increased spatial and temporal resolutions, the characterization of near-surface SSC patterns revealing areas where concentrations are highly correlated with evolutions of tides and waves. Significant tidal modulations of near-surface concentrations are thus found in the eastern English Channel and the French Dover Strait while a pronounced influence of waves is exhibited in the Channel Islands Gulf. Coastal waters present furthermore strong SSC temporal variations, particularly noticeable during storm events of autumn and winter, with maximum near-surface concentrations exceeding 40 mg l1 and increase by a factor from 10 to 18 in comparison with time-averaged concentrations. This temporal variability strongly depends on the granulometric distribution of suspended sediments characterized by local bimodal contributions of silts and sands off coastal irregularities of the Isle of Wight, the Cotentin Peninsula and the southern Dover Strait.
Źródło:: Oceanologia; 2017, 59, 1
0078-3234
Pojawia się w:: Oceanologia
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 23.

Tytuł:: Seasonal fluxes of phosphate across the sediment-water interface in Edku Lagoon, Egypt
Autorzy:: Khalil, M.K.
Rifaat, A.E.
Powiązania:: https://bibliotekanauki.pl/articles/48738.pdf
Data publikacji:: 2013
Wydawca:: Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:: phosphorus
geochemical process
modelling
coastal lagoon
Edku Lagoon
Egypt
eutrophication
sediment water
bottom water
chemical property
seasonal fluctuation
Źródło:: Oceanologia; 2013, 55, 1
0078-3234
Pojawia się w:: Oceanologia
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 24.

Tytuł:: Wave-induced bottom shear stress estimation in shallow water exemplified by using deep water wind statistics
Autorzy:: Myrhaug, D.
Powiązania:: https://bibliotekanauki.pl/articles/47582.pdf
Data publikacji:: 2017
Wydawca:: Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:: shallow water
deep water
wind
water
circulation model
shear stress
mud deposit
coastal zone
estuarine zone
bottom sediment
Opis:: The paper provides a simple and analytical method which can be used to give estimates of the wave-induced bottom shear stress for very rough beds and mud beds in shallow water based on wind statistics in deep water. This is exemplified by using long-term wind statistics from the northern North Sea, and by providing examples representing realistic field conditions. Based on, for example, global wind statistics, the present results can be used to make estimates of the bottom shear stress in shallow water.
Źródło:: Oceanologia; 2017, 59, 2
0078-3234
Pojawia się w:: Oceanologia
Dostawca treści:: Biblioteka Nauki