Badania Fizjograficzne, Seria A, Tom 67, 2016

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Browsing Badania Fizjograficzne, Seria A, Tom 67, 2016 by Author "Jawgiel, Kamil"

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    Przebieg i charakter zjawisk lodowych na rzece Łebie
    (Wydawnictwo Poznańskiego Towarzystwa Przyjaciół Nauk, 2016) Łukaszewicz, Jan; Jawgiel, Kamil
    This article presents the course and the variability of forms of ice phenomena in selected parts of the river Łeba based on data from the water gauge stations in Miłoszewo, Lebork and Cecenowo between 1960 and 2013. The authors’ intention was to elaborate complete characteristics of the ice phenomena course against the changes in the air temperature, as the main factor determining the ice phenomena on the river. Data from meteorological stations in Lębork and Łeba were used to analyse the forms and types of ice in the various parts of the river in its upper, middle and lower courses. The work does not include only natural factors of a significant impact on the course and form of ice phenomena; account has also been taken of the impact of human activity, including the transformation of the river bed to change the form and duration of individual ice phenomena in specific sections of the river. Based on the studies one may conclude that all possible genetic types of ice occurred on the river. Ice edge appeared most frequently with the river freezing only partially (46%). The second most common form was ice cover (21%). There were also ice jams and frazil ice but only in the upper and the lower courses of the river where the impact of human pressure is negligible or altogether non-existent, and the river follows its natural course. In the middle course of the river where a dam has been built (Lębork), ice phenomena such as ice blockage or ice cover do not exist. In the entire 53-year period of the observations, in general there were no effects of the ice on the river in three years. In the remaining 50 years, ice appeared regularly. A very clear downward trend in the number of days in which ice occurred was observed on the river, especially after 1987. This situation is directly related to an increase in the average air temperature in winter.
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    Zagospodarowanie terenów zalewowych Warty w wybranych miastach
    (Wydawnictwo Poznańskiego Towarzystwa Przyjaciół Nauk, 2016) Jawgiel, Kamil; Łukaszewicz, Jan
    Floodplains are administered by the Regional Water Management Authority; the establishment of floodplains is justified only in exceptional cases. The main argument against such areas is heavy material losses and human security. These areas have been developed in a cartographic form on the hazard- and flood risk maps as part of the IT System of Protecting the Country from Extreme Hazards (ISOK). In large cities like Poznan, Gorzow Wielkopolski and Konin where the impact of human activity is particularly severe, floodplains are used in different ways. The cities in question try to make an effective use of the floodplains. The aim of the study is to present the structure of land use in selected cities located along the Warta and to identify potential material losses resulting from the flooding.