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Wyświetlanie 1-15 z 2025
Tytuł:
Particulate matter air pollution in an urban area : a case study
Autorzy:
Holnicki, P.
Kałuszko, A.
Stankiewicz, K.
Powiązania:
https://bibliotekanauki.pl/articles/406579.pdf
Data publikacji:
2016
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
urban air quality
particulate matter
violation of concentration limit
source apportionment
Opis:
Many European agglomerations suffer from high concentrations of particulate matter (PM), which is now one of the most detrimental pollutants characterizing the urban atmospheric environment. This paper addresses the problem of PM10 pollution in the Warsaw metropolitan area, including very harmful fine fractions (PM2.5), and also some heavy metals. The analysis of air quality in the Warsaw agglomeration discussed in this study is based on results from computer modeling presented elsewhere, and refers to emission and meteorological data for the year 2012. The range of emissions considered in this analysis includes the main sectors of municipal activity: energy generation, industry, urban transport, residential sector. The trans-boundary inflow of the main pollutants coming from distant sources is also taken into account. The regional scale computer model CALPUFF was used to assess the annual mean concentrations of major pollutants in the urban area. The results show the regions where the air quality limits are exceeded and indicate the dominant sources of emission which are responsible for these vio-lations (source apportionment). These are the key data required to implement efficient regulatory actions.
Źródło:
Operations Research and Decisions; 2016, 26, 3; 43-56
2081-8858
2391-6060
Pojawia się w:
Operations Research and Decisions
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Urban garden as a water reservoir in an urban area – a literature review
Autorzy:
Setiawan, Wawan
Gawryszewska, Beata
Powiązania:
https://bibliotekanauki.pl/articles/36071465.pdf
Data publikacji:
2023
Wydawca:
Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
Tematy:
meta-analysis
water retention indicators
community garden
soil maintenance
planting type
Opis:
The aim of the presented work was to show that contemporary researchers recognize the potential of urban gardening in improving urban retention, and that the contemporary scientific literature mentions specific problems-indicators of retention that can be useful for developing guidelines for authorities and gardeners on the management and development of urban gardens, such as allotments and community gardens, considering their role as a retention tool. In this study, a meta-analysis of peer-reviewed scientific articles from popular scientific databases such as Web of Sciences, Science Direct, Springer and MDPI was performed, which was, besides literature analysis, the main method of research. Definitions of urban garden retention indicators were developed, which are: rainwater/stormwater infrastructure (collecting rainwater water – special infrastructure); watering systems (system for providing water strait to plants); planting type (garden plants: flowers, vegetables, fruits, herbs on beds – no turf: lawn or turf with dicotyledonous plants). The most frequent groups of indicators in the articles were also identified. The study also analyzed the distribution of surveyed articles between continents, noting the overrepresentation of articles from North America and the absence of articles from South America.
Źródło:
Scientific Review Engineering and Environmental Sciences; 2023, 32, 3; 221-237
1732-9353
Pojawia się w:
Scientific Review Engineering and Environmental Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Multi-Channel Sound Synthesis System in Open Area. A Case Study with the Use of FEM
Autorzy:
Ciesielka, W.
Filipek, R.
Powiązania:
https://bibliotekanauki.pl/articles/1197540.pdf
Data publikacji:
2014-04
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
43.50.Ki
43.55.Jz
43.55.Ka
43.60.+d
Opis:
This paper presents a new model of the multi-channel sound synthesis system. The research objective was to design and construct a sixteen-channel sound control system located in an open area with dimensions of 23.48 m×17.48 m. The main goal of the system operation is to provide, for the controlled acoustic field, the uniformity of the parameters distribution while minimizing the sound pressure level in the protected area. The modeling and simulation researches have been performed using the Finite Element Method (FEM). The results of the analysis include distributions of the sound pressure levels and phase angle for the selected frequencies. The paper presents results of sensitivity studies and optimization for different variants of the sound synthesis system.
Źródło:
Acta Physica Polonica A; 2014, 125, 4A; A-88-A-92
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Attributes of modal choice in an industrial-based urban area: A case study on Savar Paurashava
Autorzy:
Fahim, Ashraf Uddin
Alam, Md. Khorshed
Salim, Md. Adnan Arif
Bhuiyan, Md. Al-Fahad
Powiązania:
https://bibliotekanauki.pl/articles/2204252.pdf
Data publikacji:
2023
Wydawca:
Fundacja Centrum Badań Socjologicznych
Tematy:
road transportation
sustainability
Savar Paurashava
Bangladesh
transportation
travel
Opis:
Road transportation does an excellent job of connecting Savar's inner and outer areas, but it might be difficult for commuters to decide which mode of transportation to employ because residents of Savar come from a wide range of socioeconomic backgrounds. It is necessary to do in-depth research on the characteristics of people in the study region who choose different modes of transportation to achieve the goal of selecting a certain mode for their travel. Where a person lives can have a significant impact on their typical patterns of travel behavior. People who live closer to the center of things have access to a wider variety of amenities than those who live further away, and as a consequence, their travel patterns are distinct from one another. The study's findings indicate that several factors, including income, age, gender, and vocational qualities and goals, influence a commuter's preferred method of transportation. When it comes to selecting a mode of transportation, the most predictable factors to take into account are trip time and cost. After conducting research, it was found that most excursions are made from this place to Motijheel, Tejgaon, and Savar Export Processing Zone for their services, businesses, and jobs, respectively.
Źródło:
Journal of Sustainable Development of Transport and Logistics; 2023, 8, 1; 63--72
2520-2979
Pojawia się w:
Journal of Sustainable Development of Transport and Logistics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Entrepreneurship in China’s Greater Bay Area - a gender perspective
Przedsiębiorczość w GBA w Chinach - perspektywa płci
Autorzy:
Nowak, Martyna
Powiązania:
https://bibliotekanauki.pl/articles/2021545.pdf
Data publikacji:
2020
Wydawca:
Politechnika Częstochowska
Tematy:
female entrepreneurship
China
Greater Bay Area
Gender
Gender inequality
przedsiębiorczość kobiet
Chiny
płeć
nierówność płci
Opis:
As China started its transition from centrally planned to the market economy, entrepreneurship has become one of the major forces for its economic development. However, there is still a significant research gap in the area of female entrepreneurship in China and its correlation with gender inequalities. The shift to the neo-liberalism and promotion of the self-reliance of the individual led to the reinforcement of the traditional gender norms, which affected not only female entrepreneurs, but women in general. Such a context deserves a more in-depth analysis and attention. Applying the method of the semistructured in-depth interviews, this study, conducted with female business leaders of the Greater Bay Area (GBA), focuses on the ways in which the dominant discourses of both entrepreneurial ‘ideal’ and gender roles are internalised and reinforced, shaping women’s experience and opportunities as entrepreneurs and managers of their businesses. It’s findings suggest that despite the fact that economic growth of China continues, the situation for female entrepreneurs is likely not to improve as they are still constrained by their role of primary carer and the traditional gender norms which contradict with their leadership and management positions.
Kiedy Chiny rozpoczęły przechodzenie od gospodarki planowanej centralnie do gospodarki rynkowej, przedsiębiorczość stała się jedną z głównych sił napędowych ich rozwoju gospodarczego. Jednak nadal istnieje znaczna luka badawcza w obszarze przedsiębiorczości kobiet w Chinach i jej korelacji z nierównościami płci. Przejście do neoliberalizmu i promowanie samodzielności jednostki doprowadziło do wzmocnienia tradycyjnych norm dotyczących płci, co dotknęło nie tylko kobiety przedsiębiorcze, ale ogólnie kobiety. Taki kontekst zasługuje na głębszą analizę i uwagę. Wykorzystując metodę częściowo ustrukturyzowanych wywiadów pogłębionych, badanie to, przeprowadzone z kobietami liderami biznesu z obszaru Greater Bay Area (GBA), koncentruje się na sposobach internalizacji dominujących dyskursów zarówno ról przedsiębiorczych, jak i ról płciowych. oraz wzmocnione, kształtowanie doświadczenia i możliwości kobiet jako przedsiębiorców i kierowników swoich przedsiębiorstw. Wyniki sugerują, że pomimo utrzymującego się wzrostu gospodarczego w Chinach, sytuacja kobiet-przedsiębiorców prawdopodobnie nie ulegnie poprawie, ponieważ nadal ogranicza je pełniona przez nie rola głównej opiekunki oraz tradycyjne normy dotyczące płci, które są sprzeczne z ich kierownictwem i stanowiskami kierowniczymi.
Źródło:
Polish Journal of Management Studies; 2020, 22, 2; 324-343
2081-7452
Pojawia się w:
Polish Journal of Management Studies
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Roses and hawthorns in an urban area: a case study of Gorzów Wielkopolski in Poland (NW Poland)
Autorzy:
Sołtys-Lelek, Anna
Gruszka, Wojciech
Powiązania:
https://bibliotekanauki.pl/articles/2173108.pdf
Data publikacji:
2021-11-20
Wydawca:
Uniwersytet Pedagogiczny im. Komisji Edukacji Narodowej w Krakowie
Tematy:
Crataegus
distribution of critical species
list of species
Polska
Rosaceae
Rosa
Opis:
This paper presents the distribution of species of the genera Crataegus and Rosa in Gorzów Wielkopolski, Poland. Based on literature data and field research, 25 taxa were found to occur here, comprising 11 hawthorn species and 14 rose taxa. Among the taxa of hawthorns, 6 were native taxa belonging to 2 subseries Erianthae and Crataegus, and 5 were classified as cultivated ornamental taxa. Among the taxa of genus Rosa L., there were 10 native species (including 2 native hybrid forms at the rank of species), 2 anthropophytes, 1 cultivated species, and 1 hybrid form. Among those identified, as many as 13 taxa were new to the flora of Gorzów Wielkopolski. These were Crataegus ×macrocarpa, C. ×subsphaericea, C. ×media, Rosa dumalis, R. villosa, R. sherardii, R. tomentosa, R. inodora, R. jundzillii, R. ×subcanina, R. ×subcollina, the old, cultivated variety R. ×francofourtana, and an interspecific hybrid Rosa canina × R. rubiginosa. The occurrence of Rosa jundzillii, a species rare in Poland and not previously reported in the Gorzów Upland, was noted during the study. The following varieties of roses that are rare in Poland were also found: R. dumalis var. acharii, R. dumalis var. caballicensis, R. canina var. andegavensis, and R. canina var. deseglisei. This study showed that although the city area is strongly transformed by man, there is a high diversity of taxa of the studied genera.
Źródło:
Annales Universitatis Paedagogicae Cracoviensis Studia Naturae; 2021, 6; 25-47
2543-8832
2545-0999
Pojawia się w:
Annales Universitatis Paedagogicae Cracoviensis Studia Naturae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Causes of groundwater level and chemistry changes in an urban area; a case study of Warsaw, Poland
Autorzy:
Krogulec, Ewa
Gruszczyński, Tomasz
Kowalczyk, Sebastian
Małecki, Jerzy J.
Porowska, Dorota
Sawicka, Katarzyna
Trzeciak, Joanna
Wojdalska, Anna
Zabłocki, Sebastian
Zaszewski, Daniel
Powiązania:
https://bibliotekanauki.pl/articles/24024702.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czasopisma i Monografie PAN
Tematy:
urban area
Quaternary aquifer
Oligocene aquifer
groundwater level changes
infiltration
groundwater chemistry
Warsaw
obszar miejski
czwartorzędowe piętro wodonośne
oligoceńskie piętro wodonośne
zmiany poziomu wód gruntowych
infiltracja
chemizm wód podziemnych
Warszawa
Opis:
The presented studies focus on changes in groundwater levels and chemistry, and the identification of important factors influencing these changes on short- and long-term scales in urban areas. The results may be useful for rational and sustainable groundwater planning and management in cities. The studies concerned three aquifers: (1) the shallow Quaternary aquifer, (2) the deep Quaternary aquifer, and (3) the Oligocene aquifer in the capital city of Warsaw (Poland). The spatial variability of groundwater recharge was determined and its changes in time were characterized. The characteristics of groundwater levels were based on long-term monitoring series. The results indicate that urban development has caused overall reduction in infiltration recharge (from 54 to 51 mm/year), which is particularly clear in the city suburbs and in its centre, where land development has significantly densified during the last 30 years. Studies of groundwater levels indicate variable long-term trends. However, for the shallowest aquifer, the trends indicate a gradual decrease of the groundwater levels. In the case of the much deeper Oligocene aquifer, groundwater table rise is observed since the 1970s (averagely c. 20 m), which is related with excessive pumping. Based on the studied results, the groundwater chemistry in the subsurface aquifer indicates strong anthropogenic influence, which is reflected in multi-ionic hydrogeochemical types and the occurrence of chemical tracers typical of human activity. The Oligocene aquifer is characterized by a chemical composition indicating the influence of geogenic factors.
Źródło:
Acta Geologica Polonica; 2022, 72, 4; 495--517
0001-5709
Pojawia się w:
Acta Geologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Kartografia hydrogeologiczna Tatr i Podhala-rys historyczny
Hydrogeological cartography of the Tatras and Podhale area-a historical outline.
Autorzy:
Chowaniec, J.
Powiązania:
https://bibliotekanauki.pl/articles/2074583.pdf
Data publikacji:
2008
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
mapy hydrogeologiczne
hydrostruktura
poziom wodonośny
Tatry
Podhale
hydrogeological map
hydrostructure
aquifer
Tatra Mts.
Podhale area
Opis:
Hydrogeological maps of the Polish Tatra Mts. and Podhale region are dated back to the sixties of the last century. In that time, within the frame of the Hydrogeological Map of Poland, 1 : 300 000, the Cieszyn sheet which covered the Tatras and the Podhale region was elaborated. A very important input in the hydrogeological cartography of this region was the Hydrogeological Map of the Podhale and the adjacent areas, 1 : 100 000 published in 1982. In the 1990s accomplishment of the Hydrogeological Map of Poland, 1 : 50 000 has been launched. The area under cartographic studies covers four sheets: Czarny Dunajec, Biały Dunajec, Tatry Zachodnie, and TatryWysokie. Some new Geographic Information System data regarding the Hydrogeological Map of Poland, 1 : 50 000, such as first aquifer, its occurrence and hydrodynamics, pollution vulnerability and quality of groundwater is presently continued and complimented.
Źródło:
Przegląd Geologiczny; 2008, 56, 12; 1079-1081
0033-2151
Pojawia się w:
Przegląd Geologiczny
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Spójność terytorialna Łódzkiego Obszaru Metropolitalnego - pomiar zjawiska
Territorial Cohesion of Lodz Metropolitan Area - A Measurement of the Phenomenon
Autorzy:
Bartosiewicz, Bartosz
Powiązania:
https://bibliotekanauki.pl/articles/2029512.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Źródło:
Studia komitetu przestrzennego zagospodarowania kraju PAN; 2012, 147; 155-167
0079-3507
Pojawia się w:
Studia komitetu przestrzennego zagospodarowania kraju PAN
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A brooch from Wrocław area. A contribution to the research on the migration period in south-west Poland
Autorzy:
Błażejewski, Artur
Powiązania:
https://bibliotekanauki.pl/articles/1038293.pdf
Data publikacji:
2015-01-01
Wydawca:
Uniwersytet im. Adama Mickiewicza w Poznaniu
Tematy:
Late Migration Period
SW-Poland
Thuringia brooch
Opis:
In spring 2012 in the area of the village of Krzyżowice, approximately 15 km SW of Wrocław, an accidental discovery of a brooch was made. The brooch’s bow is cast in bronze, while the preserved fragments of the pin and spring were made of iron. Currently, the length of the artefact is 5 cm, but originally it was probably approximately 5.5 cm, because the base which is slightly curved upwards, was initially straight. All similar brooches come from the territory of the Thuringia tribe in the 5th/6th century AD, namely Thuringia and Bohemia. Such a dating places the brooch among the group of artefacts representing the youngest chronological horizon of the Przeworsk cultural area.
Źródło:
Slavia Antiqua: rocznik poświęcony starożytnościom słowiańskim; 2015, 56; 171-182
0080-9993
Pojawia się w:
Slavia Antiqua: rocznik poświęcony starożytnościom słowiańskim
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Engineering Geological Properties of Coastal Plain Sands in Selected Areas in Ikoyi Area, a typical Coastal Sedimentary Terrain
Autorzy:
Alabere, Abdulquadri O.
Emmanuel, Olaoluwa E.
Powiązania:
https://bibliotekanauki.pl/articles/1162844.pdf
Data publikacji:
2018
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Bearing capacity
Displacement Piles
cone penetrometer
standard penetration test
Opis:
Coastal plain sands in some selected areas of Ikoyi, in Lagos, Dahomey basin southwestern Nigeria have been investigated with respect to their geotechnical properties to determine their suitability as construction materials and to recommend suitable foundation type for the proposed developments. Representative samples collected from each sites were subjected to standard engineering tests and CPT method was used for calculating the bearing capacity of the soil. The cone resistance values (Qc) ranges from 8-158 kg/cm3, 20-160 kg/cm3, 32-166 kg/cm3 for Sokoto street site, Parkview estate site, and Delta street site respectively. Correlating this result with standard penetration test values, it shows dense soil at 3m, 10m and 45m for Delta Street site, medium dense soil at 2m and 30m for Parkview estate site, and medium dense soil at 3m, 29m and 30m for Sokoto Street site. The undrained triaxial test revealed that undrained cohesion ranges from 47-70 KNm-2, 44-95 KNm-2, and 15-30 KNm-2 with no angle of internal friction for Sokoto Street, Delta Street and Parkview estate site respectively. These values show that the soils have low bearing capacity due to low undrained cohesion and angle of internal friction. The geotechnical analysis result show that for the proposed building (tower) on the three sites, shallow foundation cannot be supported because the foundation pressure exceeds the bearing capacities of the soil across the three sites at shallow depth and the loads needs to be transferred to more competent soil layer at deeper depth via a non- displacement (or replacement) pile.
Źródło:
World Scientific News; 2018, 110; 23-41
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis and application of filling mining technology in China’s mining area: a case study of Yuxing Coal Mine
Autorzy:
Huang, Dongmei
Xing, Daqian
Chang, Xikun
Zhu, Yingying
Powiązania:
https://bibliotekanauki.pl/articles/2073879.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
kopalnia węgla
ochrona środowiska
osiadanie powierzchni
coal mine filling mining
environmental protection
technology of surface subsidence control
engineering applications
Opis:
According to the requirements of green mine construction and the coordinated development of environmental protection regulations, the existing filling technologies in China are compared and analysed. Several types of technologies are discussed, including the dry filling technology for gangue, grouting and filling for separated strata zones in overburden, grouting and filling technology for caving gangue fissures, paste and paste-like filling, high-water and ultra-high-water filling, and continuous mining and continuous filling. Then, the characteristics of these individual technologies are analysed. Through the analysis and comparison of these technologies, considering the requirements of green mine construction and coordinated development of environmental protection regulations, it was found that continuous mining and continuous filling technology is a feasible mean for constructing green mines and protecting the environment. In this study, the application of continuous mining and continuous filling technology in the Yuxing coal mine is introduced. Results show that surface subsidence was less than 80 mm, and the recovery rate of the working face reached 95%. This indicates that continuous mining and continuous filling technology can solve the problems of surface subsidence, environmental damage, and coal resource waste. Finally, the development prospects of continuous mining and continuous filling technology are proposed, providing theoretical and technical support for similar mining.
Źródło:
Archives of Mining Sciences; 2021, 66, 4; 611--624
0860-7001
Pojawia się w:
Archives of Mining Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Assessment of a critical area for a give-way ship in a collision encounter
Autorzy:
Krata, P.
Montewka, J.
Powiązania:
https://bibliotekanauki.pl/articles/223997.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
maritime traffic safety
collision risk
anticollision
ship's motion model
ship domain
bezpieczeństwo ruchu morskiego
ryzyko kolizji
zapobieganie kolizji
ruch statku
model ruchu statku
Opis:
Evasive action in ship-ship encounter has to be carried out on time and in line with the international convention on collision regulation – COLREG. The convention not only includes a set of rules defining types of relations between encountering ships but also indicates appropriate action to be taken in a given encounter. One of such encounters is crossing, where, in case of a collision situation, a give-way ship has to take an appropriate action in due time. However, a stand-on vessel is also given an opportunity to manoeuver, if it is made clear to her that the other ship is not fulfilling her obligations. However, it is difficult to specify, at which point in time in the course of an encounter, the stand-on ship has to take an action in order to avoid collision. It is understandable, as this parameter depends on numerous factors, both endogenous (e.g. ship characteristics, her maneuverability), and exogenous (e.g. type of encounter, weather conditions). Therefore in this paper we make an attempt towards the definition of the critical area for a maneuver of a stand-on ship, in the situation where the give-way vessel does not take an action. This is determined with the use of a hydrodynamic model of ship motion, and series of simulations conducted for several types of encountering ships under various conditions. Once determined, the critical area demarcates the no-go area around the own ship, where any other ships on collision courses must not enter. Otherwise a collision cannot be avoided by an action of one ship alone.
Źródło:
Archives of Transport; 2015, 34, 2; 51-60
0866-9546
2300-8830
Pojawia się w:
Archives of Transport
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Electrical Resistivity and Seismic Refraction Methods of Investigating a Landslide Area: A Case Study of Elu Community, Abia State, Nigeria
Autorzy:
Nwankwo, C. N.
Ugbena, G. K.
Powiązania:
https://bibliotekanauki.pl/articles/1075506.pdf
Data publikacji:
2019
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Electrical resistivity
Elu
Landslide
Layers
seismic velocity
Opis:
This study was carried out to investigate the subsurface structure in a landslide area in a community in Ohafia Abia State, using geophysical data obtained from the subsurface formation of the area. A total of seven stations comprising of three vertical electrical sounding (VES) using Schlumberger electrode configuration and four electrical resistivity profiling (2D) using Wenner array configuration were occupied. Resistivity data were acquired using the Abem terrameter (AGI single R8). The data were smoothened and analyzed using Schlumberger computer automatic iterative software. In the same line seismic critically refracted data were acquired using 12-channel ABEM Terraloc MK III digital seismometer and processed with the Reflexw software into 2D velocity depth models. A two-layer model was delineated by the velocity profile with a range of 338 m/s and 4356 m/s for the entire depth of probe. Results of resistivity model show 6 constrained geo-electric layers covering a total depth of 55.0 m with low resistivity values for the top soil. Increase in resistivity with depth observed in the study indicates increase in compaction and solidification with depth in the subsurface as layers alternates. The resistivity of most of the formation layers are averagely high suggesting a high degree of void spaces inside the rock material. This might have resulted from high erosional activities in the area that gave rise to landslides. Also, the formation lithology for the area is mainly sand/sandstone from the top soil to the survey depth, suggesting non protective or absence of highly compacted clay materials that are more resistant to erosion associated with heavy rainfall in the area.
Źródło:
World Scientific News; 2019, 129; 135-146
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Petrographical analysis of Warthian fluvioglacial gravels as a tool to trace the source area – a case study from central Poland
Autorzy:
Górska-Zabielska, M.
Wachecka-Kotkowska, L.
Powiązania:
https://bibliotekanauki.pl/articles/94704.pdf
Data publikacji:
2014
Wydawca:
Uniwersytet im. Adama Mickiewicza w Poznaniu
Tematy:
gravel petrography
indicator erratics
fluvioglacial deposits
Warthian stadial
central Poland
żwirowa petrografia
eratyki przewodnie
osady fluwioglacjalne
centralna Polska
Opis:
The petrographical features of the medium- and coarse-grained gravels (4-10 mm and 20-60 mm, respectively) of weathered and fresh (unweathered) deposits indicate, in combination with so-called indicator and statistical erratics, that two glacial lobes joined in the borderland of the Polish Lowlands and Uplands. Lower Palaeozoic limestones become less frequent in the finer gravel fraction, whereas crystalline rocks and flints become more frequent. The petrographical analysis of the coarser gravel fraction indicates that the ice sheet advanced from the NE to NNW (the Widawka lobe) and from the NE to ENE (the Rawka, Pilica and Luciąża lobes). The source areas of the gravel deposited by the Warthian ice sheet were magmatic and sedimentary areas of both the Baltic and the SE Sweden basins.
Źródło:
Geologos; 2014, 20, 3; 183-199
1426-8981
2080-6574
Pojawia się w:
Geologos
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 2025

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