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    Wyświetlanie 1-8 z 8
    Tytuł:
    Osiąganie stanów ekstremalnych przez wody podziemne
    Extremes of groundwater level fl uctuation
    Autorzy:
    Afelt, A.
    Oksiuta, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/2084733.pdf
    Data publikacji:
    2009
    Wydawca:
    Uniwersytet Warszawski. Wydział Geografii i Studiów Regionalnych
    Tematy:
    wody podziemne
    cechy morfologiczne
    analiza hydrogeologiczna
    wartosci ekstremalne
    drenaz powierzchniowy
    Opis:
    The fluctuation of groundwater level in the period 1960-2000 for 49 measurement stations located in 19 catchements has been analysed. It was observed that extremes were achieved asynchronously in the period studied. Regional co-variability as regards the frequency of occurrence and the duration of extremes, as well as their multi-annual changes during the period studied has been found, in the following types of catchements: mountain, lowland and Mazurian Lakeland, coastal rivers (Pomeranian Lakeland) and, separately, aquifer horizons related to lake systems. No statistically significant tendencies in the changes of high and low levels of groundwater have been observed. The relationship of groundwater extremes to those of surface water is best defined in the upper segments of the mountain valleys. A statistically significant consistency of direction of groundwater and surface water level movements has been observed in the river valleys of lakeland catchements: the delay is at least one week. The fluctuation of extremes in the multi-annual period is periodic; it is consistent with the occurrence of periods of intense precipitation or its deficit.
    Źródło:
    Prace i Studia Geograficzne; 2009, 43; 115-137
    0208-4589
    Pojawia się w:
    Prace i Studia Geograficzne
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Transformacja struktury systemów rzecznych w Karpatach Ukraińskich
    Transformation processes in the river systems structure in Ukrainian Carpathians
    Autorzy:
    Kowalczuk, I.
    Michnowicz, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/2084793.pdf
    Data publikacji:
    2009
    Wydawca:
    Uniwersytet Warszawski. Wydział Geografii i Studiów Regionalnych
    Tematy:
    Ukraina
    Karpaty
    system rzeczny
    transformacja
    cechy morfologiczne
    sieci rzeczne
    Opis:
    The paper deals with the theoretical basis, methods and the main results of the investigations of the river system structure (the network of rivers of different orders) transformation. On the basis of a morphometrical analysis of topographical maps from different periods (1855, 1935, 1975, 2005) in the 1:100 000 scale, using the Strahler-Filosofov classification scheme, the structure of representative river systems of Ukrainian Carpathians was investigated. The partial and the total length and number of the streams of every order as well as the correlation between these parameters and bifurcation coefficients were determined. The trends and scales of the river systems structure transformation for the period 1855-2005 were also evaluated. Subject to investigation were the river systems of NE macroslopes of the Carpathlian Mountains.
    Źródło:
    Prace i Studia Geograficzne; 2009, 41; 119-126
    0208-4589
    Pojawia się w:
    Prace i Studia Geograficzne
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Z genezy stożków kemowych
    On the origin of came cones
    Autorzy:
    Smolska, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/2085676.pdf
    Data publikacji:
    1988
    Wydawca:
    Uniwersytet Warszawski. Wydział Geografii i Studiów Regionalnych
    Tematy:
    stozki kemowe
    geneza
    Wysoczyzna Bialostocka
    Wysoczyzna Wysokomazowiecka
    cechy morfologiczne
    Opis:
    In North-East Poland, in the Riss Glaciation zone there occur hills of a characteristic conical shape. They have asymmetric slopes: one is usually short and steep, the opposite is longer and softer. They are connected with depressions left by blocks of dead ice and usually situated on the border of such basins. They are built of fluvioglacial deposits, sometimes with added ablation clays. They are formed through the accumulation of deposits into cones in large fissures of ice slopes. Their genesis is shown by their inner structure. All the layers originate in the culmination of the cone and thin out in accordance with the longer slope; the measurements of their dip direction indicate a fanshaped disposition of the directions of transport. By way of example two such forms have been described; they are situated in the western part of the Białystok Upland and in the North-East part of the Wysokie Mazowieckie Upland. Because of their morphometric and structural features they are called came cones (R. F. Flint 1957, A. Karczewski 1971, A. Musiał, K. Straszewska, M. Ziembińska-Tworzydło 1982, A. Musiał 1983).
    Źródło:
    Prace i Studia Geograficzne; 1988, 09; 53-73
    0208-4589
    Pojawia się w:
    Prace i Studia Geograficzne
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Cechy sedymentologiczne i wiek osadów równiny zalewowej Słupi
    Sedimentological features and age of the deposits in the flood plain if the Slupia river
    Autorzy:
    Florek, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/2085660.pdf
    Data publikacji:
    1988
    Wydawca:
    Uniwersytet Warszawski. Wydział Geografii i Studiów Regionalnych
    Tematy:
    rzeka Slupia
    rownina zalewowa
    cechy sedymentologiczne
    osady
    cechy morfologiczne
    budowa geologiczna
    Opis:
    The investigations carried out by the author up to the present place the age of the Słupia river flood plain in the sub-Atlantic period - 1850±110 B.P. Gd.-864. The deposits forming the flood plain reach ca 4 m of thickness and they are underlain by older deposits including grey boulder clay defined as older clay from the last glaciation (the Vistulian). The differences in the lithological development of deposits in the river-bed and beyond it in both investigated points, result both from natural causes (accumulating effect of the „Bydlino threshold” in reference to the investigation point in Słupsk) and from anthropogenic factors (accumulating effect of damming-up devices in Słupsk and the draining effect of subterranean erosion below the Krzynia dam - in reference to the investigation point at Dębnica Kaszubska). The quartz grain rounding of the deposits is poor both in the flood plain and on the terrace lying above it. They contain large quantities of α-type grains and a very small amount of γ-type grains which makes the deposits resemble morainic and even waste deposits. The features of the quartz grain surface evaluated under the scanning microscope and the binocular have confirmed the conclusion of the low degree of fluvial grain abrasion. A striking fact is the large number of corrosive pits due to the effect of a strongly chemically active environment. It is possible that it was a pelagic environment (Eems sea). Similar marks of the survival of features of another environment have been observed on the grain surface of some heavy minerals the composition of which has also confirmed the low degree of fluvial abrasion of the deposits. The composition of heavy mineral is the proof of an increased inflow of morainic and fluvioglacial material coming from the denudation and erosion of post-glacial deposits. It may be connected not only with the commonly observed Holocene tendency of low-land rivers to cut into the ground, but also with increased denudation of the drainage area due to intensified settlement in the river valley and on its slopes. All the investigations have shown the low degree of fluvialisation of the deposits. Preciser technics (in the analysis of the surface of quartz grains and of some heavy minerals) have revealed some features of deposits connected with the environments in which the deposits were accumulated, then incorporated into the mass of the Vistulian ice-sheet and carried by it into the area of Pomerania. The action of the Vistulian glacial environment, towards its close, and of the late glacial and Holocene fluvial environment has not been able to efface those features.
    Źródło:
    Prace i Studia Geograficzne; 1988, 09; 75-103
    0208-4589
    Pojawia się w:
    Prace i Studia Geograficzne
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Zmiany pokrywy glebowej pod wpływem erozji
    The changes of soil cover as a result of erosion
    Autorzy:
    Paluszek, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/2084657.pdf
    Data publikacji:
    2010
    Wydawca:
    Uniwersytet Warszawski. Wydział Geografii i Studiów Regionalnych
    Tematy:
    gleby erodowane
    erozja gleb
    gleby deluwialne
    cechy morfologiczne
    wlasciwosci gleby
    plony roslin
    Opis:
    The objectivc of the paper is to evaluate the influence of soil erosion on soil morphology of Luvisols and Phaeozems, soil properties and crop yields. Depth of soil profiles and genetic horizons are analysed during field research in order to determine a truncation extent of eroded soils in comparison with the model profile of non-eroded soil. A characteristic feature of the soil cover in loess and moraine areas is the mosaic-type differentiation of the non-eroded soils, soils of various erosion classes, and colluvial deposits on the slopes and foothills. This variability is the effect of the levelling off of the original micro-relief of the loess surface through tillage erosion. Destruction of soil genetic horizons is accompanied by depletion of humus substances and nutrients in soil. In contrast to non-eroded soils, Ap horizons of eroded soils developed from illuvial horizons or parent material have poorer aggregation, aggregate water stability and less favourable water-air properties. As a result of small aggregate water stability, eroded soils are susceptible to crusting and further water erosion during periods of heavy runoff. Also, erosion tend to destroy crop plants and to leach plant protection chemicals. Affecting crops and soil fertility, erosion contributes to large losses of crop yields.
    Źródło:
    Prace i Studia Geograficzne; 2010, 45; 279-294
    0208-4589
    Pojawia się w:
    Prace i Studia Geograficzne
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Piętrowość krajobrazów w Azji Centralnej
    Altitudinal zonality of landscapes in Central Asia
    Autorzy:
    Zgorzelski, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/2084787.pdf
    Data publikacji:
    2009
    Wydawca:
    Uniwersytet Warszawski. Wydział Geografii i Studiów Regionalnych
    Tematy:
    Azja Centralna
    geoekologia
    krajobraz
    krajobraz gorski
    wyzyny
    pustynie
    zlodowacenia
    klimat
    cechy morfologiczne
    Opis:
    The paper succinctly discusses the altitudinal zonality of landscapes in Central Asia in their macro and regional dimensions. It deals with such issues as the morphogenetic stages of the Himalaya, Karakoram, Trans-Himalaya and Tibetan lands, the level of the Gobi and huge Central Asian basins. Periglacial zonality and stages of mountain deserts are also disccused. To sum up, the author offers a typology of Central Asian landscapes.
    Źródło:
    Prace i Studia Geograficzne; 2009, 41; 245-260
    0208-4589
    Pojawia się w:
    Prace i Studia Geograficzne
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Morfologia plaż wybrzeży Wysp Zielonego Przylądka jako odzwierciedlenie ich litologii i warunków hydrodynamicznych
    Morphology of coastal beaches in Cape Verde Islands as a reflection of their lithology and hydrodynamic conditions
    Autorzy:
    Florek, W.
    Leczynski, L.
    Powiązania:
    https://bibliotekanauki.pl/articles/2084784.pdf
    Data publikacji:
    2009
    Wydawca:
    Uniwersytet Warszawski. Wydział Geografii i Studiów Regionalnych
    Tematy:
    Wyspy Zielonego Przyladka
    wyspy
    cechy morfologiczne
    plaze
    litologia
    warunki hydrodynamiczne
    Opis:
    The authors presented the findings from the morphological and structural research of several beaches located on some of the Cape Verde Islands. These islands constructed from granulometrically and petrographically varied rocks, mostly origanated from Mesozoic and Tertiary volcanites. They are also influenced by tides: semidiurnal tides which reach a height of 0.5-1.5 m, and steady trade winds which blow from the north-east. It was revealed that the beaches in question in terms of their morphological and lithological features can be classified as environments characterised by considerable energy of coastal processes.
    Źródło:
    Prace i Studia Geograficzne; 2009, 41; 73-87
    0208-4589
    Pojawia się w:
    Prace i Studia Geograficzne
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Dorzecze Gangesu i Brahmaputry jako region geograficzny. Wybrane problemy
    The Ganges and the Brahmaputra basin as a geographical region - selected aspects
    Autorzy:
    Winidowa, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/2084699.pdf
    Data publikacji:
    2010
    Wydawca:
    Uniwersytet Warszawski. Wydział Geografii i Studiów Regionalnych
    Tematy:
    rzeka Ganges
    rzeka Brahmaputra
    regiony geograficzne
    sieci rzeczne
    dorzecza
    srodowisko przyrodnicze
    klimat
    cechy morfologiczne
    miasta
    zegluga
    energetyka
    aspekty polityczne
    Opis:
    The Ganges and the Brahmaputra rivers are amongst the largest in the world. Since the dawn of civilisation they have played a pivotal role in the social and economic life of the countries that they flow through: Nepal, India and Bangladesh. It is there that same of the very first civilisations originated. They owed their existence to the first farmers, for whom settling in a larger group and harvesting together brought only benefits. Even today, most of the local population harvests the land, just like their forefathers did several thousand years before. The edible crops provide a basis of nutrition for the natives and industrial crops serve as major sources of income for these countries. In the Ganges and the Brahmaputra valleys there lie many urban areas, including several with a population that exceeds 10 million. Those include Calcutta - 15.7 million, Delhi 13.2 million, and Dhaka - 12.3 million. The Ganges waters are used for religious and ritual purposes as Hinduism deems the river holy. In addition, it is one of the most polluted rivers in the world, its condition partially being due to ritual ceremonies. The use of the Ganges and the Brahmaputra waters was a cause for many conflicts between India and Bangladesh. Even though a compromise was reached, each of the two countries is still trying to prove that they have more rights to use the priceless waters.
    Źródło:
    Prace i Studia Geograficzne; 2010, 44; 31-44
    0208-4589
    Pojawia się w:
    Prace i Studia Geograficzne
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-8 z 8

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