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Author: Kundzewicz, Zbigniew W. × DDC: 910 ×

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    Flood risk in a range of spatial perspectives – from global to local scales
    (Katlenburg-Lindau : European Geophysical Society, 2019) Kundzewicz, Zbigniew W.; Su, Buda; Wang, Yanjun; Wang, Guojie; Wang, Guofu; Huang, Jinlong; Jiang, Tong
    The present paper examines flood risk (composed of hazard, exposure, and vulnerability) in a range of spatial perspectives – from the global to the local scale. It deals with observed records, noting that flood damage has been increasing. It also tackles projections for the future, related to flood hazard and flood losses. There are multiple factors driving flood hazard and flood risk and there is a considerable uncertainty in our assessments, and particularly in projections for the future. Further, this paper analyses options for flood risk reduction in several spatial dimensions, from global framework to regional to local scales. It is necessary to continue examination of the updated records of flood-related indices, trying to search for changes that influence flood hazard and flood risk in river basins.
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    Variability of snow cover and frost depth at the Potsdam station, Germany
    (Praha : Česká geografická společnost, 2016) Szwed, Małgorzata; Kundzewicz, Zbigniew W.; Mezghani, Abdelkader
    The presented paper examines variability of characteristics of snow cover (snow cover depth, number of days with snow cover and dates of beginning and end of snow cover) and frost depth in Potsdam. The study makes use of a unique long time series of data from the secular meteorological station in Potsdam (Germany), covering the time interval from 1893 to date. The observed behaviour of time series of snow is complex, and not easy to interpret. Even if shrinking snow cover is typically expected in the warming climate of the moderate zone, the change in Potsdam is largely dominated by inter-winter and intra-winter variability, rendering trend detection difficult. Nevertheless, an increasing, statistically significant trend for winter precipitation was detected with almost no changes in the snow fall. A statistical link between the NAO index and the snow cover depth as well as the number of snow cover days was found.