Summary
In July and at the beginning of August 1997 a study was undertaken in the Gulf of Gdańsk and Pomeranian Bay to follow the immediate effects of the flood which occurred within the Polish rivers — Wisla and Odra — drainage areas. The study included measurements and observations of meteorological and hydrodynamic parameters, basic physico-chemical variables, certain persistent organic pollutants as well as heavy metals and the level of sanitary pollution. The paper presents an overview of environmental conditions in the bays, based on hydrochemical data, subsequent to the inflow of the flood crests. Results of biological investigations, carried out solely in the Pomeranian Bay, on phytoplankton abundance, biomass, species composition and Zooplankton diversity are also presented in the paper. The results of measurements were evaluated in comparison with long-term (1979–1996) monitoring data and control measurements carried out in the last decade of August. It was found out that the impact of flood water was restricted to internal areas of both bays and the negative environmental effects appeared only locally.
Zusammenfassung
Im Juli und Anfang August 1997 fand in der Danziger und in der Pommerschen Bucht eine Untersuchung mit dem Ziel statt, die unmittelbaren Auswirkungen der Flut, die sich in den Einzugsgebieten der polnischen Flüsse Weichsel und Oder ereignet hatte, festzustellen. Die Untersuchung umfaßte Messungen und Beobachtungen meteorologischer, hydrodynamischer und physisch-chemischer Parameter, bestimmter beständiger organischer Schadstoffe sowie Messungen von Schwermetallen und Messungen zum Grad der Verunreinigungen durch Colibakterien. Die Arbeit gibt einen Überblick über Umweltbeeinträchtigungen in den betroffenen Gebieten im Anschluß an den Einstrom des Hochwassers basierend auf hydrochemischen Daten. Ergebnisse biologischer Untersuchungen in der Pommerschen Bucht, speziell auf den Gehalt an Phytoplankton, Biomasse und deren Zusammensetzung sowie auf Zooplanktonvielfalt, werden gezeigt. Die Ergebnisse der Messungen wurden im Vergleich mit Daten aus Langzeitreihen (1979–1996) und Kontrollmessungen in der letzten Dekade des August bewertet. Es wurde festgestellt, daß der Einfluß des Hochwassers sich auf die inneren Gebiete beider Buchten beschränkte und negative Umweltveränderungen nur lokal auftraten.
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Lysiak-pastuszak, E., Drgas, N., Ciszewska, I. et al. Environmental observations in the Gulf of Gdansk and Pomeranian Bay following the summer flood of 1997. Deutsche Hydrographische Zeitschrift 50, 109–127 (1998). https://doi.org/10.1007/BF02764482
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DOI: https://doi.org/10.1007/BF02764482