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Wyszukujesz frazę "slope wash" wg kryterium: Temat

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    Wyświetlanie 1-2 z 2
    Tytuł:
    The assessment of influence of soil erosion by water in the transformation of agricultural slopes of the Wiśnicz Foothills
    Autorzy:
    Święchowicz, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/294374.pdf
    Data publikacji:
    2018
    Wydawca:
    Stowarzyszenie Geomorfologów Polskich
    Tematy:
    soil erosion
    water
    raindrop erosion
    slope wash
    linear erosion
    Wiśnicz Foothills
    Polska
    erozja gleby
    woda
    erozja liniowa
    Pogórze Wiśnickie
    Polska
    Opis:
    The main aim of the paper is to assess influence of soil erosion by water in the transformation of agricultural slopes of the edge of Wiśnicz Foothills. Low hills are typical in the morphology of the area. Results presented come from measurements of soil erosion by water in 2007–2009. Soil erosion took place during short transformation periods and was caused by events of high magnitude and low frequency during which soil particles are transported from the slope to the channel, but its supply was only local and episodic. In the foothill area slope and channel are weakly linked.
    Źródło:
    Landform Analysis; 2018, 36; 85-95
    1429-799X
    Pojawia się w:
    Landform Analysis
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Cinder movement experiments on scoria cones slopes : Rates and direction of transport
    Autorzy:
    Hooper, D. M.
    Powiązania:
    https://bibliotekanauki.pl/articles/294542.pdf
    Data publikacji:
    1999
    Wydawca:
    Stowarzyszenie Geomorfologów Polskich
    Tematy:
    erosion rates
    San Francisco volcanic field
    downslope transport
    cinder cone
    scoria cone
    surficial processes
    rainsplash
    slope wash
    overland flow
    hillslope processes
    Opis:
    As part of a field experiment to examine slope processes, four experimental grids with painted and numbered cinders were placed on the outer crater rims of two scoria cones in the San Francisco volcanic field, Arizona. Each grid contained 50 cinders placed in five rows of ten each. Rows were placed parallel to local slope contours. The mean diameter for each cinder was 1.7±0.2 cm (n = 200) and the average grid slope was 20.2°. Grids were set in July 1992. They were revisited one month later in August 1992 and again two years later in August 1994. Although several cinders failed to show any movement in the August 1992 survey, the average length of movement was 11.2 cm (n = 118). If the total movement is averaged over the 197 cinders that were relocated, the average length of movement then becomes 6.7 cm (n = 197). All cinders showed movement in the August 1994 survey and the average distance of movement was 32.8 cm (n= 141 with 59 missing cinders). The mean annual rate of movement after 25 months was 15.8cm/yr(n= 141). Using the convention that the 180° azimuth direction is downslope and perpendicular to local slope contours, the direction of cinder movement more closely approaches 180° with an increase in time. The azimuth directions calculated after just one month of emplacement display greater scatter and variability than the more correlated results measured after 25 months. The mean azimuth value after the 1992 survey was 163.6±54.2° (n= 118), while the mean azimuth after the 1994 survey was 177.9±20.7° (n = 141). Several painted cinders displayed upslope movement when the grids were first visited after one month. However, after two years the cumulative movement for every cinder was downslope from its original position. Non-channel overland flow is interpreted to be the primary erosional agent responsible for moving the cinders in the downhill direction. Rainsplash is interpreted to be responsible for moving the cinders in the upslope direction and is believed to be the major contributor to the variability in the azimuth measurements.
    Źródło:
    Landform Analysis; 1999, 2; 5-18
    1429-799X
    Pojawia się w:
    Landform Analysis
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-2 z 2

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