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    Wyświetlanie 1-2 z 2
    Tytuł:
    Hydrologic drought characteristics of selected basins in various climate zones of Lebanon
    Autorzy:
    Tayara-Zobaida, El
    Powiązania:
    https://bibliotekanauki.pl/articles/24085181.pdf
    Data publikacji:
    2023
    Wydawca:
    Instytut Meteorologii i Gospodarki Wodnej - Państwowy Instytut Badawczy
    Tematy:
    drought characteristics mapping
    streamflow drought index
    standardized precipitation index
    basin
    Lebanon
    Opis:
    River basins in Lebanon recently have experienced increasing droughts, which has prompted this study to characterize drought temporally and spatially. The study describes and analyzes hydrologic and precipitation conditions in seven river basins, representing most flow directions in various climatic zones. The characteristics of hydrologic and rainfall drought were discussed and analyzed, depending on available data from five climatic zones and fourteen hydrometric stations distributed in the river, allowing for a detailed analysis of drought. The Standardized Precipitation Index (SPI) and the Streamflow Drought Index (SDI) were calculated at 6-month intervals (first and second 6-months) using the DRINC program. The hydrologic and rainfall drought characteristics maps generated in the GIS platform may help to identify the degree of drought in the study areas. The investigation was carried out by examining the strength of relationships between SDI and SPI using bivariate correlation analysis. The significance of the correlation coefficient is used in this study to decide whether linear relationships between the SPI and SDI occurred in the first and second six months. Calculating the correlation coefficient for these variables based on hydrologic and rainfall data reveals an inconsistent correlation over different periods.
    Źródło:
    Meteorology Hydrology and Water Management. Research and Operational Applications; 2023, 11, 2; 1--24
    2299-3835
    2353-5652
    Pojawia się w:
    Meteorology Hydrology and Water Management. Research and Operational Applications
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Nonparametric design hydrograph in the gauged cross sections of the Vistula and Odra basin
    Autorzy:
    Gądek, W. J.
    Baziak, B.
    Tokarczyk, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/108482.pdf
    Data publikacji:
    2017
    Wydawca:
    Instytut Meteorologii i Gospodarki Wodnej - Państwowy Instytut Badawczy
    Tematy:
    Cracow method
    nonparametric hydrograph
    Archer method
    flow descriptor
    semi-standardized volume
    Opis:
    The Archer method for construction of nonparametric hydrographs was regarded as the basic one for constructing design hydrographs in gauged cross sections. The hydrographs designed using this method belong to a group of non-formalized hydrology. Unlike the commonly used formalized methods, where a nonparametric hydrograph is strictly determined and defined, the hydrographs defined in this way are constructed on the assumption, that flow is the main determined parameter. On the other hand, the Archer method assumes that the basic parameter is time, which is determined for assigned standardized flow, called a flow percentile. Hydrographs constructed using this method are the basis for constructing parametric design hydrographs used for engineering computations. The Archer method is relatively new and should be verified for various regions. Presented manuscript compares the results obtained using this method in the middle Odra and upper Vistula basins with the nonparametric method developed at the Cracow University of Technology, called the Cracow method. The obtained results show, that four highest registered flood waves are sufficient to construct a nonparametric design hydrograph, whereas semi-standardized volumes above descriptors W75 and W50 and the duration time of the descriptors are bigger than the volumes and duration times calculated by means of the Cracow method in the Vistula River basin, and approximate with regard to the values in the Odra River basin.
    Źródło:
    Meteorology Hydrology and Water Management. Research and Operational Applications; 2017, 5, 1; 53-61
    2299-3835
    2353-5652
    Pojawia się w:
    Meteorology Hydrology and Water Management. Research and Operational Applications
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-2 z 2

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