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    Wyświetlanie 1-7 z 7
    Tytuł:
    Warunki termiczno-tlenowe Jeziora Białego Włodawskiego w półroczu letnim (2012–2015)
    Autorzy:
    Ptak, Mariusz
    Nowak, Bogumił
    Powiązania:
    https://bibliotekanauki.pl/articles/763108.pdf
    Data publikacji:
    2016
    Wydawca:
    Uniwersytet Marii Curie-Skłodowskiej. Wydawnictwo Uniwersytetu Marii Curie-Skłodowskiej
    Tematy:
    lakes, temperature, climate change, Łęczyńsko-Włodawskie Lakeland
    jeziora, temperatura, tlen rozpuszczony, zmiany klimatyczne, Pojezierze Łęczyńsko-Włodawskie
    Opis:
    The article presents thermal-oxygen conditions of Lake Białe Włodawskie in the warm half-year (May–October) in the years 2012–2015. Due to its morphometric parameters, summer stratification develops in the lake. In the period analysed in the paper, the highest temperature was recorded in July 2012 (27.5°C), and the lowest at the bottom in May 2013 (4.2°C). The highest difference in temperature throughout the water column was recorded during measurements in July 2012. It amounted to 22.7°C (27.5°C at the surface and 4.8°C at the bottom). The highest mean temperature throughout the water column (determined as the mean from all of the analysed months) occurred in 2015 (9.7°C), and the lowest in 2013 (7.8°C). The highest water temperature corresponded to the highest air temperature for station Włodawa, located several kilometres north of the lake. The mean concentration of oxygen dissolved in water (as the mean from all of the analysed months) suggests that the highest value 4.7 [mgO2 ∙ dm-3] occurred in 2012, and the lowest 3.0 [mgO2 ∙ dm-3] in 2013. In vertical distribution, the maximum oxygen concentration mounted to 13.5 [mgO2 ∙ dm-3] in May 2013, and the minimum value decreased to zero multiple times. Complete lack of oxygen occurred each time in August, September, and October. It appeared the earliest in June 2013 (at a depth of 26 m), and the latest in August 2015 (at a depth of 28 m). The thickest water layer without oxygen was recorded in August 2013 already at a depth of 11 m. The studied lake is prone to strong anthropopressure. Due to favourable morphometric parameters and high resistance to degradation, however, it still maintains its high recreational values, although such a state may change in the near future in the context of increasing anthropopressure and observed climatic changes.
    Artykuł nie zawiera streszczenia w języku polskim.
    Źródło:
    Annales Universitatis Mariae Curie-Sklodowska, sectio B – Geographia, Geologia, Mineralogia et Petrographia; 2016, 71, 1
    0137-1983
    Pojawia się w:
    Annales Universitatis Mariae Curie-Sklodowska, sectio B – Geographia, Geologia, Mineralogia et Petrographia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Recharge and drainage of lakes in the Powidzki Landscape Park in conditions of increased anthropogenic and environmental pressure (central-western Poland)
    Autorzy:
    Nowak, Bogumił Michał
    Przybyłek, Jan
    Powiązania:
    https://bibliotekanauki.pl/articles/2058553.pdf
    Data publikacji:
    2020
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    surface resources
    groundwater resources
    hydraulic contacts
    water level changes
    mining dewatering
    evapotranspiration
    Gniezno Lakeland
    Opis:
    The lakes of the Powidzki Landscape Park (Gniezno Lakeland) are known for their natural and recreational values. The majority of them are located within two large glacial tunnel valleys, that in many places cut through several levels of till and inter-till aquifers. Regional hydraulic linkage systems are developed where surface water and groundwater remain in direct contact. Smaller water bodies occur between the lakes, in other tunnel valleys, in isolated meltwater basins, or in river valleys. These water bodies constitute local drainage bases. The existence in the area of such morphologically diverse lakes with different flow rates, varied morphology, and heterogeneous geological structure permitted tracing of the hydrodynamic dependencies of lake catchments of various types. Hydrogeological cross-sections, comparative analyses of structural maps for successive aquifers, bathymetric plans of lakes, and piezometric contour maps were prepared. Surface and groundwater level fluctuations were investigated, as well as their response to changing atmospheric conditions. Water balances of lakes were also determined for selected lake catchments. The study showed that all the lakes analysed are closely related to groundwater, and that the deepest ones reach lower aquifers. The majority of the lakes drain the aquifers, but some of the lakes feed them. Such a situation was documented in coastal wetlands and in the eastern part of the Park, affected by a depression cone associated with a nearby lignite opencast mine. The study showed that the deepest of the lakes analysed have a very wide catchment area of groundwater recharge, expanding beyond the boundaries of their surface catchment areas. This is important for the development of their resources, especially in periods of hydrogeological low flow.
    Źródło:
    Geological Quarterly; 2020, 64, 1; 205--219
    1641-7291
    Pojawia się w:
    Geological Quarterly
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Natural and anthropogenic conditions of water level fluctuations in lakes – Lake Powidzkie case study (Central-Western Poland)
    Naturalne i antropogeniczne uwarunkowania wahań poziomu wody w jeziorach na przykładzie Jeziora Powidzkiego, środkowo-zachodnia Polska
    Autorzy:
    Nowak, Bogumił M.
    Ptak, Mariusz
    Powiązania:
    https://bibliotekanauki.pl/articles/292907.pdf
    Data publikacji:
    2019
    Wydawca:
    Instytut Technologiczno-Przyrodniczy
    Tematy:
    climatic conditions
    environmental anthropopressure
    Lake Powidzkie
    water level changes
    water resources
    antropopresja środowiskowa
    Jezioro Powidzkie
    warunki klimatyczne
    zasoby wodne
    zmiany poziomu wody
    Opis:
    The article presents the analysis of water level fluctuations in Lake Powidzkie in the years 1961–2015. The study shows a considerable decrease in mean water levels in the aforementioned multiannual period, averaging 9 cm∙decade–1. Such a situation is caused by natural as well as anthropogenic factors, co-determining water relations in the study area. The natural factors include the amount and distribution of precipitation, increase in air temperature and evaporation size, unfavourable relations between the lake and catchment or hydrogeological conditions. Anthropogenic factors particularly include long-term transformations of the natural environment in the region, currently associated with meliorations accompanying the nearby opencast brown coal mines and exploitation of groundwaters for municipal purposes. Water shortages occurring during dry periods were shown not to be compensated in the study area in humid years. This is particularly related to the regional lowering of the aquifer remaining in close relations with Lake Powidzkie. Counteracting the unfavourable hydrological situation is done through hydrotechnical infrastructure which partially limits water outflow from the lake through damming.
    W artykule dokonano analizy zmian poziomu wody Jeziora Powidzkiego w latach 1961–2015. Z przeprowadzonych badań wynika, że w powyższym wieloleciu nastąpił znaczny spadek średnich stanów wody, średnio o 9 cm∙dek.–1. Sytuacja taka spowodowana jest czynnikami naturalnymi i antropogenicznymi, które współoddziałują na kształtowanie się stosunków wodnych na badanym obszarze. Do pierwszych należy zaliczyć ilość i rozkład opadów, wzrost temperatury powietrza oraz niekorzystne relacje jezioro–zlewnia. Drugie to przede wszystkim długotrwałe przeobrażenia środowiska przyrodniczego w tym regionie, które obecnie utożsamiane są z odwodnieniami, towarzyszącymi pobliskim odkrywkom węgla brunatnego oraz eksploatacji wód podziemnych na potrzeby komunalne. Wykazano, że niedobory wody, powstające podczas okresów suchych, nie są rekompensowane na badanym obszarze w latach wilgotnych, co z kolei związane jest głównie z regionalnym obniżeniem poziomu wód podziemnych, z którymi Jezioro Powidzkie pozostaje w ścisłym kontakcie. Przeciwdziałanie niekorzystnej sytuacji hydrologicznej stanowi zabudowa hydrotechniczna, która poprzez piętrzenie jeziora częściowo ogranicza ubytek wody z akwenu.
    Źródło:
    Journal of Water and Land Development; 2019, 40; 13-25
    1429-7426
    2083-4535
    Pojawia się w:
    Journal of Water and Land Development
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Characteristics of daily water temperature fluctuations in lake Kierskie (West Poland)
    Autorzy:
    Ptak, Mariusz
    Sojka, Mariusz
    Nowak, Bogumił
    Powiązania:
    https://bibliotekanauki.pl/articles/1051197.pdf
    Data publikacji:
    2019-09-30
    Wydawca:
    Uniwersytet im. Adama Mickiewicza w Poznaniu
    Tematy:
    lake
    water temperature
    air temperature
    wind speed
    Poznań
    Opis:
    The paper presents the dynamics of daily water temperature fluctuations in Lake Kierskie (West Poland) and determines the effect of air temperatures and wind speed on the variability of the parameter (water temperature). The analysis was based on hourly water temperature values from the period from May 2012 to January 2018. The data analysis permitted the description of the thermal regime of waters in the lake in the hourly cycle in reference to each month, and designation of months characterised by the highest and lowest stability of water temperatures. More than half of the analysed days was characterised by a change in water temperature not exceeding 1°C. The course of water temperature showed strongly positive correlations with air temperature, and weak correlations with wind speed. Water temperatures in the lake were correlated the strongest with air temperatures with a 24 h time step.
    Źródło:
    Quaestiones Geographicae; 2019, 38, 3; 41-49
    0137-477X
    2081-6383
    Pojawia się w:
    Quaestiones Geographicae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Influence of a lake on river water thermal regime: A case study of Lake Sławianowskie and the Kocunia River (Pomeranian Lakeland, Northern Poland)
    Autorzy:
    Nowak, Bogumił
    Ptak, Mariusz
    Stanek, Paulina
    Powiązania:
    https://bibliotekanauki.pl/articles/108570.pdf
    Data publikacji:
    2020
    Wydawca:
    Instytut Meteorologii i Gospodarki Wodnej - Państwowy Instytut Badawczy
    Tematy:
    river-lake system
    water temperature
    measurement data
    Opis:
    Water temperature is one of the basic physical parameters of rivers and lakes. Rising temperature can transform these ecosystems over a broad range of factors (water mixing, water quality, biological conditions, etc.). In the case of rivers, their thermal regimes also can be modified by local conditions (e.g., tree cover, adjoining water bodies, etc.). In this paper, we address the functioning of the river-lake system in northern Poland (Kocunia River-Lake Sławianowskie) in terms of the effect of the lake on temperature conditions in the river. Dependencies in daily water temperatures between stations located above and below the lake were assessed with linear regression. Based on daily morning water temperatures for the period 2012-2017, it was determined that water temperature in the river below the lake was higher than at the measurement site located above the lake by an average of 1.1°C. The greatest differences were recorded in summerautumn months when average monthly downstream water temperatures were as much as 3.9°C higher than upstream water temperatures. This phenomenon is an example of a local factor (the lake) magnifying global factors, i.e. rising temperatures associated with climate change. The information in this paper can provide future reference for decision makers and state institutions with responsibility for measures aimed at reducing the effects of climate change.
    Źródło:
    Meteorology Hydrology and Water Management. Research and Operational Applications; 2020, 8, 1; 78-83
    2299-3835
    2353-5652
    Pojawia się w:
    Meteorology Hydrology and Water Management. Research and Operational Applications
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A two-decade record of variations in suspended sediment in the Warta River, a lowland river in western Poland
    Autorzy:
    Skolasińska, Katarzyna
    Nowak, Bogumił
    Bradtke, Katarzyna
    Powiązania:
    https://bibliotekanauki.pl/articles/2060129.pdf
    Data publikacji:
    2020
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    suspended sediment concentration
    suspended load
    long-term record
    anthropogenic impact
    lowland river
    Warta River
    Opis:
    Fluctuations in suspended sediment concentration (SSC) has been investigated in the Warta River(western Poland), based on data obtained for the period 1961-1980 from three gauge stations located in upstream, middle-stream and downstream areas. Over the two decades, the SSC values demonstrated wide fluctuations and an overall increase at each gauge station. No significant correlation was generally observed between SSC and discharge but high SSC was found to follow low discharge and increasing temperature during the summer seasons in some years. Measurements of SSC and discharge were used to estimate total annual suspended sediment load (SSL). SSL values were found to increase downstream along with an increase in discharge. SSC decreases along the river course. However, when it comes to changes over time, SSL variability was mainly determined by SSC changes. The maximum SSC values were primary caused by anthropogenic factors: the disposal of mine wastewater upstream, river training works, increased urbanisation and the intensification of sewage disposal. Where the river catchment has been greatly affected by anthropogenic factors, a denudation index calculated solely based on SSC and discharge does not appear to reflect the actual denudation rate, and must be treated with caution.
    Źródło:
    Geological Quarterly; 2020, 64, 4; 1048--1060
    1641-7291
    Pojawia się w:
    Geological Quarterly
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Fantazja, emocje, refleksja. Bajki w warsztacie nauczyciela etyki
    Autorzy:
    Danszczyk, Joanna
    Folda, Magdalena
    Glicka, Magdalena
    Gościniak, Joanna
    Jakubowski, Daniel
    Klak, Justyna
    Nowak, Ewa
    Rudawski, Bogumił
    Tomczak, Aneta
    Powiązania:
    https://bibliotekanauki.pl/articles/781492.pdf
    Data publikacji:
    2011
    Wydawca:
    Uniwersytet im. Adama Mickiewicza w Poznaniu
    Opis:
    Opowieści w konwencji bajki z przesłaniem filozoficznym, ailment mogą znacząco wzbogacić warsztat nauczyciela etyki, który przymierza się do pracy z dziećmi w wieku wczesnoszkolnym. Starannie dobrana bajka, zaprezentowana przez nauczyciela (lub uczniów) w sposób sceniczny, może wzbudzić nie tylko zainteresowanie (i kluczowe w filozofii) zdziwienie (Martens, 2003), ale także tzw. dysonans poznawczy w zetknięciu z kontrowersją, dylematem lub konfliktem racji czy dóbr
    Źródło:
    Ethics in Progress; 2011, 2, 1; 45-51
    2084-9257
    Pojawia się w:
    Ethics in Progress
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-7 z 7

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