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    Wyświetlanie 1-3 z 3
    Tytuł:
    Wpływ warunków meteorologicznych na imisję pyłu zawieszonego oraz kształt smug kominowych w sezonie grzewczym
    Influence of meteorological conditions on the particulate matter immission and the shape of wastegases streaks in the heating season
    Autorzy:
    Wierzbińska, Monika
    Szczepaniak, Robert
    Powiązania:
    https://bibliotekanauki.pl/articles/2054006.pdf
    Data publikacji:
    2021
    Wydawca:
    Akademia Techniczno-Humanistyczna w Bielsku-Białej
    Tematy:
    streak of wastgases
    imission
    atmosphere balance
    air quality
    smuga kominowa
    imisja
    równowaga atmosfery
    jakość powietrza
    Opis:
    The aim of the study was to analyze exhaust gas streaks emitted from emitters during the heating season in the city of Żywiec. The relationships between the shape of the streaks and the weather conditions (wind speed and direction, air temperature and humidity, atmospheric pressure, precipitation, dust concentration) were analyzed. The shape of the chimney streaks (streaks: looping, coning, fanning, lofting, fumigation) has a decisive influence on the quality of the atmospheric air in the vicinity of the emitters. The observations of the emitters were carried out for 92 days - at 6 a.m. and 6 p.m., to separate the conditions existing before the satisfaction of social and living needs (morning hours) and at the time of satisfying them (evening hours). At the same time, data of the state of the atmosphere obtained from the Żywiec-Zabłocie air quality station and from two weather stations: ŻAR BSP Międzybrodzie Żywieckie and IMWM-PIB Radziechowy were recorded. The article presents the results of measurements of the state of the atmosphere and the observation of streaks. Data analysis showed a direct influence of weather conditions on the shape of the streaks and thus on the air quality. Analysis of the results showed that during periods of thermal inversion, there was an increase in the immission of particulate matter in the ground layer of the atmosphere. These conditions were often accompanied by pollutant or loop-shaped chimney streaks. Moreover, the increase in wind speed resulted in a decrease in the concentration of dust pollutants in a given area and contributed to the formation of ventilation streaks. During the observation of pollutant and loop-type chimney streaks, the immission of suspended dust increased significantly, which resulted in deterioration of air quality in Żywiec.
    Źródło:
    Polish Journal of Materials and Environmental Engineering; 2021, 1(21); 26-37
    2720-1252
    Pojawia się w:
    Polish Journal of Materials and Environmental Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Wybrane aspekty badania długoterminowych cykli zmian zapasu wody glebowej w drzewostanach jednogeneracyjnych
    Selected aspects of the study of long-term cycles of changes in the soil water storage in single generation stands
    Autorzy:
    Suliński, J.
    Starzak, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/979483.pdf
    Data publikacji:
    2019
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    drzewostany jednopokoleniowe
    woda glebowa
    zapas wody w gruncie
    zmiany zapasu wody glebowej
    forest water balance
    forest soil water storage
    water balance equation
    atmosphere−forest−soil model
    Opis:
    This article describes cyclic changes in the soil water storage that take place within developmental stages of the stands managed by clear−cutting system. The aim of the paper is to present possibilities of studying these changes and their significance for the dynamics of waterlogging of forest ecosystems and water outflow from the forest. Soil water storage (SWS) in forest soils undergoes cyclic changes that can be divided into short−term, seasonal and long−term. Short−term changes, calculated on a daily basis, and seasonal, covering the entire growing season, can be identified and analyzed based on stock values measured over relatively short periods. Studying long−term cycles in this way is practically impossible, as there are no long−term measuring sequences. However, it is possible to use water−balance equilibrium in atmosphere−stand−soil (A−D−G) for this purpose. The dependent variables include increments of soil water storage, while independent ones are represented by the biometric features of stands and hydro−climatic factors. The balance equations should be built separately for SWS supply and losses. In the recharge phase the increase of the SWS after single rainfall, the amount of potential interception proportional to the plant surface and the weight of the forest litter as well as rainfall intensity and duration, which determine the level of its use are taken into account. SWS losses are explained by the rates of plant transpiration, linearly dependent on the amount of biomass produced and evaporation from the soil surface, which is a function of the amount of solar energy and wind velocity within the stand. They are modulated in relation to the conditions above the canopy that in turn depend on biometric characteristics of the stand. Taking into account the hydro−climatic conditions above the canopy ensures that the ceteris paribus condition is met. Recognition of long−term SWS cycles is possible due to the knowledge of stand dynamics manifested by changes in the value of its biometric features. The identification of equations according to the above−mentioned indications was carried out many times with very high compliance in the conditions of even−aged low−energy stands. The occurrence of long−term SWS cycles raises a number of questions regarding the forest ecosystem functioning, description of forest sites, silvicultural systems applied as well as the ability to control the water balance in forest ecosystems. The hydrological conditions in the forest ecosystem are shaped mostly upon selecting silvicultural system to be implemented. It results in specific changes in biometric features in the subsequent stand development stages modulating the components of the A−D−G balance and, as a consequence, soil water relations. The impact of ongoing stand tending is limited. However, forest drainage, tree felling uncovering soil surface and sudden changes in the forest structure triggered by abiotic and biotic factors, may produce significant effects.
    Źródło:
    Sylwan; 2019, 163, 03; 216-227
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Comparison of daily evapotranspiration rates obtained from water balance model and modified Bowens ratio method
    Autorzy:
    Olejnik, J.
    Eulenstein, F.
    Kedziora, A.
    Werner, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/25976.pdf
    Data publikacji:
    2001
    Wydawca:
    Polska Akademia Nauk. Instytut Agrofizyki PAN
    Tematy:
    plant production
    water exchange
    earth surface
    microclimatic condition
    atmosphere
    modelling
    evapotranspiration
    Bowen's ratio method
    water balance model
    Źródło:
    International Agrophysics; 2001, 15, 1
    0236-8722
    Pojawia się w:
    International Agrophysics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-3 z 3

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