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Tytuł:
Detection of Objects Buried in the Sea Bottom with the Use of Parametric Echosounder
Autorzy:
Kozaczka, E.
Grelowska, G.
Kozaczka, S.
Szymczak, W.
Powiązania:
https://bibliotekanauki.pl/articles/177224.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
sea bottom
sea bottom acoustic
buried objects
Opis:
The paper contains results of a in situ research main task of which was to detect objects buried, partially or completely, in the sea bottom. Object detecting technologies employing acoustic wave sources based on nonlinear interaction of elastic waves require application of parametric sound sources. Detection of objects buried in the sea bottom with the use of classic hydroacoustic devices such as the sidescan sonar or multibeam echosounder proves ineffective. Wave frequencies used in such devices are generally larger than tens of kHz. This results in the fact that almost the whole acoustic energy is reflected from the bottom. On the other hand, parametric echosounders radiate waves with low frequency and narrow beam patterns which ensure high spatial resolution and allows to penetrate the sea bottom to depths of the order of tens of meters. This allows to detect objects that can be interesting, among other things, from archaeological or military point of view.
Źródło:
Archives of Acoustics; 2013, 38, 1; 99-104
0137-5075
Pojawia się w:
Archives of Acoustics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Bottom Sediments as an Element of the Krąpiel River Ecosystem
Autorzy:
Raczyńska, M.
Machula, S.
Łukaszewicz, P.
Raczyński, M.
Powiązania:
https://bibliotekanauki.pl/articles/125464.pdf
Data publikacji:
2016
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
bottom sediments
Krapiel river
breeding of salmonids
bottom fauna
Opis:
Research on the structure of sediments was carried out in 2015 in the river Krąpiel and its tributaries. The main objectives of this study were to classify the types of sediments with grain size analyzing according three different criteria, as well as influence of the substrate on the abundance and diversity of macrobenthic organisms, and to determine the quality of the ground for natural breeding of salmonids. It was found that according to Polish standards, bottom sediments of the Krąpiel river and its tributaries belong to the coarse – gravel type or sandy – gravel type, whereas according to the method used in Anglo-Saxon countries – these are sandy sediments. It was also shown that the grain size of bottom sediments of the Krąpiel river and its tributaries determine friendly living environment for macroinvertebrates and for breeding salmonids.
Źródło:
Journal of Ecological Engineering; 2016, 17, 2; 121-127
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Processing data on sea bottom structure obtained by means of the parametric sounding
Autorzy:
Kozaczka, E.
Grelowska, G.
Kozaczka, S.
Szymczak, W.
Powiązania:
https://bibliotekanauki.pl/articles/259876.pdf
Data publikacji:
2012
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
sea bottom acoustic
sub-bottom profiler
sea bed structure
Opis:
The aim of the paper is to analyze data obtained during sounding the Gdansk Bay sea bed by means of the parametric echo-sounder. The accuracy of the sea bottom structure investigation needs correct configuration of research equipment and proper calibration of peripheral devices (GPS, heading sensor, MRU-Z motion sensor and navigation instruments which provide necessary data to bathymetrical measurement system, enabling its work with full capability. The parametric sub-bottom profiler delivers two types of data which include different information: envelope and pure echo signal sampled without processing. The first is used to present echograms in real time and the second one is stored during sounding and the obtained data can be analyzed by using post-processing software. Differences in the results are presented and discussed. And, are described also criteria taken into account during determination of the measurement areas and selection of different configurations of the software according to the information to be obtained from trials. Complementary information can be achieved from processing the data by means of the procedures offered by Matlab software, which allows for a clear 3D presentation of the results. The consideration are illustrated by echograms taken in the natural conditions.
Źródło:
Polish Maritime Research; 2012, 4; 3-10
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Notes on the Use of Effective Methods for Application of Economics of Moderation
Autorzy:
Jekielek, Jan
Powiązania:
https://bibliotekanauki.pl/articles/680996.pdf
Data publikacji:
2016
Wydawca:
Uniwersytet Jagielloński. Wydawnictwo Uniwersytetu Jagiellońskiego
Tematy:
Project improvement, bottom-down improvement approach, bottom-down methods, Economics of Moderation
Opis:
One of the side eects of the American 1979 recession-triggered replacement of Keynesian Economics by Monetarism of the Milton Friedman Chicago School of Economics was the replacement of managing engineers by administrators in technology organizations, construction and projects.In that role reversal, costs invariably started to go up with growing administration preoccupied with numbers and dates, and with form often prevailing over content that seemed to be sometimes “lost in translation”. The era sometimes called “Economics of Excess” had begun.Organizations faced with escalating costs have kept searching for improvement solutions making use of elaborate analytical top-down methods, with very mixed results. A simple bottom up approach and methods developed and applied by the author on industrial and educational projects are summarized. Tey have been very successful on their own as well as in supporting organizational improvement eorts. They are directly applicable to the concept of Economics of Moderation.
Źródło:
Rocznik Administracji Publicznej; 2016, 2
2449-7800
Pojawia się w:
Rocznik Administracji Publicznej
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Szczecin Lagoon - A single or multiple biotopes?
Autorzy:
Poleszczuk, G.
Powiązania:
https://bibliotekanauki.pl/articles/84803.pdf
Data publikacji:
2000
Wydawca:
Akademia Pomorska w Słupsku
Tematy:
Szczecin Lagoon
biotope
hydrological regime
bottom morphology
bottom sediment
salinity
ecosystem
biocenosis
Źródło:
Baltic Coastal Zone. Journal of Ecology and Protection of the Coastline; 2000, 04
1643-0115
Pojawia się w:
Baltic Coastal Zone. Journal of Ecology and Protection of the Coastline
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Badania płytkich zbiorników wodnych za pomocą metody GPR
GPR investigation of shallow water reservoirs
Autorzy:
Karczewski, J.
Ziętek, J.
Powiązania:
https://bibliotekanauki.pl/articles/183610.pdf
Data publikacji:
2009
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
GPS
metoda georadarowa
sub-bottom profiler
osady denne
GPR
bottom sediment
Opis:
In the paper, the applicability of the GPR method for shallow depths investigations is presented. Factors which have essential influence on GPR measurements quality are shown. Measurement techniques used in such investigations are discussed with special regard to GPS application. Results obtained for different reservoirs are shown. To compare, results from sub-bottom profiler are included.
Źródło:
Geologia / Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie; 2009, 35, 2/1; 437-443
0138-0974
Pojawia się w:
Geologia / Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Les relations transphrastiques à la frontière entre la phrase et le texte
Interclausal relations at the boundary between sentence and text
Autorzy:
Prandi, Michele
Powiązania:
https://bibliotekanauki.pl/articles/31341269.pdf
Data publikacji:
2023
Wydawca:
Wydawnictwo Uniwersytetu Śląskiego
Tematy:
Interclausal relations
complex sentence
text
up-bottom structures
bottom-up structures
Opis:
Interclausal relations are traditionally studied within the framework of the complex sentence of endocentric subordinative form. However, there is no essential correlation between interclausal linkage and complex sentence. Interclausal relations are not meanings of subordinate clauses but conceptual relations that bridge saturated processes of equal rank. According to this premise, complex sentence is only one option for the expression of interclausal relations, along with text. Moreover, if we compare the competing structures, it turns out that the unmarked form of expression is not complex sentence but text. While a complex sentence imposes a hierarchic syntactic structure on a symmetric conceptual structure, the structure of the text and the conceptual structure of interclausal relations are isomorphic. As a marked option, the choice of complex sentence requires a specific functional motivation, which does not involve the ideation of the link itself but the communicative perspective: its function is to impose a layered communicative perspective on the connexion, which is distributed between foreground and background information.
Źródło:
Neophilologica; 2023, 35; 1-22
0208-5550
2353-088X
Pojawia się w:
Neophilologica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Spatial Presentation of Sea Bottom Using EMIF Format
Autorzy:
Dupuy, R.
Makar, A.
Powiązania:
https://bibliotekanauki.pl/articles/320821.pdf
Data publikacji:
2010
Wydawca:
Polskie Forum Nawigacyjne
Tematy:
sea bottom
S-57
Opis:
In the paper, there is presented a problem of search object drift during SAR operation. Presented method of conducting search takes into account probability of containment (POC) of searched object inside search area. Its also consider available endurance of SAR unit. Described method allows for achieving as good as possible average POC.
Źródło:
Annual of Navigation; 2010, 16; 25-31
1640-8632
Pojawia się w:
Annual of Navigation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of digital sea bottom models generated using ENC data
Autorzy:
Dupuy, R.
Makar, A.
Powiązania:
https://bibliotekanauki.pl/articles/320873.pdf
Data publikacji:
2011
Wydawca:
Polskie Forum Nawigacyjne
Tematy:
ENC
Digital Bottom Model
Opis:
In the article basis of modeling the surface for spatial presentation of sea bottom hale been included. There have been shown typical, well known, method for generating TIN (Triangulated Irregular Network), GRID and mathematical methods using C++ environment. For presentation the sea bottom ENC (Electronic Navigational Charts) encoded in S-57 Standard have been used.
Źródło:
Annual of Navigation; 2011, 18; 27-36
1640-8632
Pojawia się w:
Annual of Navigation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Konflikt bottom up – top down w ujęciu teorii gier
Autorzy:
Kiryluk-Dryjska, Ewa
Powiązania:
https://bibliotekanauki.pl/articles/581142.pdf
Data publikacji:
2017
Wydawca:
Wydawnictwo Uniwersytetu Ekonomicznego we Wrocławiu
Tematy:
teoria gier
bottom up
Leader
Opis:
Celem publikacji jest przedstawienie konfliktu bottom up – top down w polityce rozwoju obszarów wiejskich na przykładzie programu Leader. W publikacji zastosowano teorię gier niekooperacyjnych: podejście klasyczne (równowagę Nasha) oraz alternatywne wprowadzone przez S. Bramsa [1994] – równowagę długowzroczną. Układ preferencji graczy został określony na podstawie sondażu przeprowadzonego pośród przedstawicieli lokalnych grup działania (LGD) w Wielkopolsce. Wyniki badań wykazują, że z obawy przed odrzuceniem projektów zgłaszanych do LGD często wybierane są te bardziej standardowe, mieszczące się w ogólnych ramach polityki rozwoju obszarów wiejskich, w mniejszym natomiast stopniu wyraźnie dostosowane do specyfiki lokalnych potrzeb. Na zmianę sytuacji w tym zakresie powinna wpłynąć pełna decentralizacja decyzji podejmowanych w ramach programu Leader.
Źródło:
Prace Naukowe Uniwersytetu Ekonomicznego we Wrocławiu; 2017, 477; 111-116
1899-3192
Pojawia się w:
Prace Naukowe Uniwersytetu Ekonomicznego we Wrocławiu
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Shallow-water bottom fauna of the Van Keulen fiord (Spitsbergen, Bellsund)
Autorzy:
Różycki, Olgierd
Powiązania:
https://bibliotekanauki.pl/articles/2053274.pdf
Data publikacji:
1987
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Arctic
Spitsbergen
bottom fauna
zoogeography
Źródło:
Polish Polar Research; 1987, 8, 2; 107-120
0138-0338
2081-8262
Pojawia się w:
Polish Polar Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wybrane aspekty zastosowania mikro i nanotechnologii w procesach wytwarzania
Some aspects of micro- and nano-technologies application in manufacturing processes
Autorzy:
Ruszaj, A.
Skoczypiec, S.
Wyszyński, D.
Lipiec, P.
Powiązania:
https://bibliotekanauki.pl/articles/269877.pdf
Data publikacji:
2011
Wydawca:
Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
Tematy:
mikrotechnologia
nanotechnologia
top down
bottom up
nowoczesne materiały
microtechnology
nanotechnology
bottom-up
modern materials
Opis:
Przedstawione zostały wybrane zagadnienia z zakresu mikro i nanotechnologii, które zdaniem autorów są związane z obecnymi lub przyszłymi technikami wytwarzania. Zaprezentowano możliwości integracji nauk technicznych, biologicznych i informatycznych przy udziale najnowszych osiągnięć inżynierii materiałowej. W wyniku tej integracji rysuje się możliwość zbudowania systemów wytwarzania działających na bazie kodów podobnych do kodu genetycznego organizmów żywych. Przedstawione zostały przykłady ważnych, zdaniem autorów, dla rozwoju i integracji, odkryć i rozwiązań technologicznych zmierzających do zmiany dotychczasowej strategii budowania systemów i ich elementów od "top down" do "bottom up". Z artykułu wynika konieczność tworzenia interdyscyplinarnych zespołów badawczych w celu optymalnego wykorzystania i rozwoju technologii będących rezultatem dotychczasowych badań.
Selected aspects of micro-and nanotechnology, which according to the authors are associated with current or future manufacturing techniques were described. Possibilities of integration of technical, biological and information sciences involving the latest achievements of material science were presented. As a result of this integration the ability to build production systems operating on the basis of codes similar to the genetic code of living organisms is expected. Examples of important, according to the authors, for development and integration of discoveries and technological solutions aimed at changing current strategy of systems' and their components building from the "top down" to the "bottom up". The article reveals a need to create interdisciplinary research teams to optimize the use and development of technologies that are the result of prior studies.
Źródło:
Inżynieria Maszyn; 2011, R. 16, z. 4; 7-22
1426-708X
Pojawia się w:
Inżynieria Maszyn
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Technical note: Stability of a levee made of bottom sediments from a dam reservoir
Autorzy:
Koś, K.
Zawisza, E.
Powiązania:
https://bibliotekanauki.pl/articles/178768.pdf
Data publikacji:
2014
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
bottom sediments
hydraulic embankments
stability
Opis:
Stability analysis of a levee made of the bottom sediments from Czorsztyn-Niedzica Reservoir is presented in the paper. These sediments were classified as silty sands and, based on the authors’ own research, their geotechnical parameters were beneficial, so the possibility of using this material for the hydraulic embankments was considered. Stability and filtration calculations were carried out for a levee that had the same top width – 3 m, slope inclinations 1:2 and different heights: 4, 6 and 8 m. Two methods were used: analytical and numerical. Calculations were carried out without and with a steady and unsteady seepage filtration. Based on the analysis carried out it was stated that the levee made of the bottom sediments is stable even at the height of 8.0 m, although because of the seepage on the downstream side it is recommended to use a drainage at the toe of the slope.
Źródło:
Studia Geotechnica et Mechanica; 2014, 36, 4; 65-70
0137-6365
2083-831X
Pojawia się w:
Studia Geotechnica et Mechanica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Polychaetes of Antarctic sublittoral in the proglacial zone (King George Island , South Shetland Islands)
Autorzy:
Siciński, Jacek
Powiązania:
https://bibliotekanauki.pl/articles/2052063.pdf
Data publikacji:
2004
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Antarctica
Polychaeta
sublittoral
bottom sediments
Źródło:
Polish Polar Research; 2004, 25, 1; 67-96
0138-0338
2081-8262
Pojawia się w:
Polish Polar Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Seismoacoustic studies within Wijdefjorden, Spitsbergen
Autorzy:
Kowalewski, Włodzimierz
Rudowski, Stanisław
Zalewski, S. Maciej
Powiązania:
https://bibliotekanauki.pl/articles/2052887.pdf
Data publikacji:
1990
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Arctic
Spitsbergen
bottom sediments
geophysics
Źródło:
Polish Polar Research; 1990, 11, 3-4; 287-300
0138-0338
2081-8262
Pojawia się w:
Polish Polar Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Investigation of the pulse reflected from bottom sediments
Autorzy:
Nowak, Ł.
Szymczak, W.
Powiązania:
https://bibliotekanauki.pl/articles/332780.pdf
Data publikacji:
2009
Wydawca:
Polskie Towarzystwo Akustyczne
Tematy:
bottom sediments
pulse reflected
hydroacoustics
Opis:
The paper describes method of determining time proceeding of the echo pulse arising as an effect of reflection of sampling pulse given with the known form from layered sea bottom. The main goal of presented model is to afford theoretical data that could be used as a point of reference for the experimental data obtained with SES 2000 Standard parametric echosounder. Basic formulas, computation algorithm with its implementation in Matlab language and examples of obtained results are described. Numerical simulations results are compared with experimental data. The laboratory station enabling computing acoustic impedance of sediments and parameters of sampling and echo pulse in different distances from antenna is presented.
Źródło:
Hydroacoustics; 2009, 12; 159-166
1642-1817
Pojawia się w:
Hydroacoustics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Accumulation of 137Cs in bottom sediments of the Curonian Lagoon
Autorzy:
Lujaniene, G.
Vilimaite. -Šilobritiene, B.
Jokšas, K.
Powiązania:
https://bibliotekanauki.pl/articles/148785.pdf
Data publikacji:
2005
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
caesium
sorption
desorption
bottom sediments
Opis:
Measurements of activity concentrations and speciation of 137Cs in bottom sediments of the Curonian Lagoon were carried out in samples collected in 1999-2003. In addition, the sorption-desorption processes of caesium in disturbed bottom sediments of fresh and sea water systems were investigated in long-term experiments (up to 375 days) in order to better understand the caesium behaviour during the Baltic Sea water flooding events to the Curonian Lagoon. The modified Tessier method was used to study caesium associations with geochemical phases of bottom sediments. The effect of carbonate coatings of bottom sediments on the Cs sorption-desorption process was observed. The comparative analyses of 137Cs solid phase speciation in bottom sediments after 241 and 375 days of the sorption experiment with that of the 137Cs speciation, determined in the same sediment sample before the sorption experiment, indicated that after 375 days of sorption the equilibrium was not reached, however, the Cs distribution in geochemical phases was found to be close to equilibrium. The desorption experiments evidenced the release of caesium into solution from regular exchange complex and transfer from other phases to the frayed edge sites on the layered clay minerals with its further fixation in the crystal lattice. The remobilization of "fixed" caesium was not observed, on the contrary, the redistribution of caesium with its subsequent fixation in clay minerals was observed, and on a time scale its fixation kinetics was comparable with the sorption experiment. This study showed that flooding events of sea water contaminated with caesium can cause a significant accumulation of caesium in the bottom sediments of the Curonian Lagoon and result in the redistribution of 137Cs activity concentration in the bottom sediments from one area to another.
Źródło:
Nukleonika; 2005, 50, 1; 23-29
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Macrophytes as Ełk River Quality Status Evaluation Indicators Based on Example of Nickel
Autorzy:
Skorbiłowicz, E.
Skorbiłowicz, M.
Zamojska, E.
Ofman, P.
Wójtowicz, P.
Powiązania:
https://bibliotekanauki.pl/articles/123062.pdf
Data publikacji:
2016
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
river
nickel
bottom sediment
macrophytes
Opis:
The aim of the study was to analyze the content of Ni in fractions of 1.0–0.2 mm, 0.2–0.1 mm, 0.1–0.063 mm, 0.063–0.02 mm, and <0.02 mm of river bottom sediments and plants (root, stem, leaf) of broadleaf cattail (Typha latifolia), yellow water lilies (Nuphar lutea), and cowbane (Cicuta virosa). Nickel content in bottom sediment was slightly higher than the geochemical background. The largest amounts of Ni were associated with the finest fraction, while the smallest with the thickest fraction. The highest content of this element was recorded at the point Ełk Barany, which was connected with developing industry in the city of Ełk. All of the tested plants showed greater Ni contents than the amount naturally occurring in plants. In most cases, most of Ni was associated with plant roots, and the least with leaves. It has been proven that aquatic plants can be good indicators of the aquatic environment status.
Źródło:
Journal of Ecological Engineering; 2016, 17, 3; 155-160
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Characteristics of Spatial Distribution of Phosphorus and Nitrogen in the Bottom Sediments of the Water Reservoir Poraj
Autorzy:
Rozpondek, K.
Rozpondek, R.
Pachura, P.
Powiązania:
https://bibliotekanauki.pl/articles/123884.pdf
Data publikacji:
2017
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
bottom sediments
spatial distribution
eutrophication
Opis:
The aim of this study was to determine the content of phosphorus and nitrogen in the bottom sediments of the Poraj Reservoir located on the Warta River, along with defining their spatial distribution and the relationship between these elements and organic matter, aluminum and iron. Samples of bottom sediments were collected on the basis of regular measurement grid of 46 points located in the area of the water reservoir Poraj. The collected samples were analyzed in terms of content of following elements, which values are in range: total phosphorus (TP) 0.06 – 5.06 g/kg, total nitrogen (TN) 0.17 – 9.66 g/kg, organic matter (OM) 0.49 – 28.41% of solid content, aluminum (Al) 2.44 – 145.15 g/kg and iron (Fe) 0.28 – 16.50 g/kg. By using of GIS system, spatial distribution of obtained results of laboratory analyzes were interpolated (Inverse Distance Weighted method was used). On basis of spatial distribution it was noted that in northern part of water reservoir bottom sediments have greater values of TP, TN and OM than in southern part. The study also included calculation of correlation between: OM and TN (n=46, R2 = 0.9335), TN and Fe (n=46, R2 = 0.8782), TN and Al (n=46, R2 = 0.8629), OM and Fe (n=46, R2 = 0.8243), OM and Al (n=46, R2 = 0.7981), TP and Fe (n=46, R2 = 0.7456), TP and Al (n=46, R2 = 0.6209). The presented pilot studies show that the potential content of phosphorus, nitrogen and organic matter in the sediments of the water reservoir Poraj can reach a significant level. The need to plan and carry out further research allowing the evaluation of the properties of the analyzed elements and examining their potential impact on water quality in the tested water reservoir was stated.
Źródło:
Journal of Ecological Engineering; 2017, 18, 4; 178-184
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Content of Heavy Metals in Bottom Sediments of Selected City Rivers of the Podlasie Province
Autorzy:
Skorbiłowicz, M.
Skorbiłowicz, E.
Górska, M.
Powiązania:
https://bibliotekanauki.pl/articles/124842.pdf
Data publikacji:
2018
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
heavy metals
river
bottom sediments
Opis:
The purpose of the work was to determine the relationship between the state of the water environment quality of selected rivers (Zn, Cr, Pb, Cd and Cu tests in bottom sediments), and the sources of pollution resulting from the close proximity to the cities, through which they flow. The following rivers were selected for the study: the Biała river flowing through the city of Białystok, the Narew river flowing through the city of Tykocin and the village of Złotoria, the Supraśl river flowing through the village of Michałowo and Gródek as well as the Biała river flowing through the city of Bielsk Podlaski. The sediments were collected four times from the same points in 2016 in the period from July to October. The sediment samples were collected from the points located on rivers before and beyond towns and villages. The contents of the following metals were tested in the bottom sediment samples: Zn, Cr, Pb, Cd and Cu. The analyses were carried out applying the flame absorption spectrometry method. The statistical multivariate CA and FA analyzes were used. The highest contents of Zn, Pb and Cr were recorded in the bottom sediments from the following rivers: Biała (Białystok) and Biała inflow of Orlanka (Bielsk Podlaski), which resulted from the anthropogenic activity. The research also showed the impact of the agricultural activity due to the slightly elevated Cd level.
Źródło:
Journal of Ecological Engineering; 2018, 19, 4; 197-206
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The possibilities of the environmental use of bottom sediments from the silted inlet zone of the Rożnów Reservoir
Autorzy:
Tarnawski, M.
Baran, A.
Koniarz, T.
Wyrębek, M.
Grela, J.
Piszczek, M.
Koroluk, A.
Powiązania:
https://bibliotekanauki.pl/articles/184430.pdf
Data publikacji:
2017
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
bottom sediment
environmental purposes
chemical properties
Opis:
The aim of the study was to assess the properties of bottom sediments from the inlet zone of the Rożnów Reservoir (South Poland) and to analyse the potential possibilities to use them for environmental purposes. The inlet zone of the reservoir is particularly intensely shallowed by means of the silts of the Dunajec River. A total of 20 samples were collected from the designated cross-sections. In air-dry samples of the sediments, granulometric composition, pH electrolytic conductivity (EC), sorption properties, organic carbon carbonates and macroelements content were determined. Bottom sediments from the Rożnów Reservoir indicate a great potential possibility to use them for environmental purposes (agriculture, reclamation). However, in order to fully evaluate the possibility of bottom sediment management, it is necessary to carry out an analysis of the ecological risk related to the content of heavy metals, PAHs, PCBs and to evaluate their eco-toxicity. Moreover, the main barriers to the environmental application of bottom sediments are a lack of appropriate legislation.
Źródło:
Geology, Geophysics and Environment; 2017, 43, 4; 335-344
2299-8004
2353-0790
Pojawia się w:
Geology, Geophysics and Environment
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Mercury contamination of bottom sediments in water reservoirs of southern Poland
Autorzy:
Koniarz, T.
Tarnawski, M.
Baran, A.
Florencka, N.
Powiązania:
https://bibliotekanauki.pl/articles/184703.pdf
Data publikacji:
2015
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
mercury
bottom sediments
reservoirs
geoaccumulation parameters
Opis:
The aim of this study was to assess the mercury concentration in bottom sediments, collected from eight reservoirs located in south-eastern Poland. A DMA-80 Mercury Analyser was used for the analysis of the concentration of mercury in bottom sediments. Concentration of mercury in sediments was between 0.01–0.18 mg∙kg−1. The research results show that 13 samples are above the Polish Hg background level. Only 9 samples are below the background level. Generally, the sediments belonged to class I and II (unpolluted and moderately polluted sediments). The concentration of mercury in bottom sediments follows the order: Rybnik (highest) > Bagna Rzeszowskie > Rzeszów > Ożanna > Brzóza Stadnicka > Brzóza Królewska > Głuchów > Narożniki (lowest). The low mercury content in sediments is related to absent or limited anthropogenic sources of this metal. Elevated concentrations of Hg in bottom sediments of the reservoirs in Rybnik and Bagna Rzeszowskie are related to their proximity to large agglomerations and industrial plants. Organic matter was likely to be the most important factors controlling the concentration and distribution of mercury in the studied sediments.
Źródło:
Geology, Geophysics and Environment; 2015, 41, 2; 169-175
2299-8004
2353-0790
Pojawia się w:
Geology, Geophysics and Environment
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Long gravity waves in a canal with a corrugated bottom in the asymptotic description
Autorzy:
Bielski, Włodzimierz
Wojnar, Ryszard
Powiązania:
https://bibliotekanauki.pl/articles/1839674.pdf
Data publikacji:
2021
Wydawca:
Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:
bottom profiles
homogenization approach
effective depth
Opis:
We consider the classic Lagrange long gravitational wave of a homogeneous incompressible fluid in a shallow canal with a corrugated bottom. We use the asymptotic expansion method to find the effective depth of a one-dimensional canal and, hence, the effective wave velocity. A flow in a two-dimensional tank with a corrugated bottom is also studied by this method.
Źródło:
Journal of Theoretical and Applied Mechanics; 2021, 59, 3; 443-454
1429-2955
Pojawia się w:
Journal of Theoretical and Applied Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Accumulation of selected heavy metals in willow shoots (Salix viminalis L.) cultivated in the neighbourhood of a coal ash and slag landfill
Autorzy:
Mundała, P.
Szwalec, A.
Kędzior, R.
Powiązania:
https://bibliotekanauki.pl/articles/101175.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Stowarzyszenie Infrastruktura i Ekologia Terenów Wiejskich PAN
Tematy:
willow
landfill
bottom ash
heavy metals
Opis:
The aim of the study was to evaluate the contents of Cd, Pb, Zn and Cu in shoots of willow (Salix viminalis L.) cultivated in the vicinity of a coal ash and slag landfill. The landfill is surrounded by arable lands and meadows. There are two major negative influences of the landfill - dusting and flooding. The result of these interactions is the systematic reduction of agricultural value of the land. A field with an area of 9600 m2 were chosen. The land is located east to the landfill. A total of 40 samples of biomass was collected. The contents of analysed elements were determined by FAAS using a Unicam Solaar M6 spectrometer. Distance from the landfill affects the contents of Cd, Pb, Zn and Cu in the tested willow shoots. However, there is no single concentration pattern for all the investigated metals. An increase in willow cultivation on the described area can bring a good environmental effect and become an example of proper management of the ash and slag landfill neighbourhood.
Źródło:
Infrastruktura i Ekologia Terenów Wiejskich; 2017, III/1; 1043-1051
1732-5587
Pojawia się w:
Infrastruktura i Ekologia Terenów Wiejskich
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Assessment of heavy metals contents in bottom sediments of Bug river
Autorzy:
Skorbiłowicz, E
Powiązania:
https://bibliotekanauki.pl/articles/123129.pdf
Data publikacji:
2014
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
Bug river
bottom sediment
heavy metals
Opis:
The development of industry, agriculture, and transport contributes to an increased environmental pollution by heavy metals. The aim of the study was preliminary assessment of the contents of selected metals (lead, cobalt, copper, chromium, cadmium and nickel) in the sediments of Bug river. The study comprised part of the river flowing through Poland. It was found that the Bug river sediments are not contaminated in respect to the content of tested metals. Based on the analysis of the study results, these metals can be lined up in the following order: Cr > Pb > Cu > Ni > Co > Cd. Statistical analysis showed that copper and chromium occur in Bug river sediments in forms bindings with organic matter in majority of cases. The granulometric analysis of sediments from Bug river revealed the largest percentage of two fractions: 1.0–0.2 mm with average of 47.7 ± 19.77% and 0.2–0.1 mm with average of 20.6 ± 7.7%. These are the dominant fractions with the accumulation of metals in river sediments, which has been confirmed by statistical analysis.
Źródło:
Journal of Ecological Engineering; 2014, 15, 3; 82-89
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
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