Robert Machowski
University of Silesia in Katowice
17 Papers
25 Citations
Robert Machowski is an academic researcher from University of Silesia in Katowice. The author has contributed to research in topics: Subsidence & Eutrophication. The author has an hindex of 5, co-authored 17 publications.
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Papers
Geomorphological and Hydrological Effects of Subsidence and Land use Change in Industrial and Urban Areas
Abstract: Land subsidence caused by mining activities is an example of human transformation of the natural environment and leads to changes in land use. The study covers an area of 958 ha in the Silesian Upland, southern Poland. Records from the period 1890–1990 document the presence of subsidence effects in 82.9% of the study area and the maximum displacement figure is more than 30 m which translates to an average rate of 0.3 m per year. It was found that subsidence basins serve as the new local erosion base and new sedimentation basins. They are filled with sediments whose level of pollution ranges from moderate to heavy and extremely heavy. Subsidence has caused a dramatic change in the local hydrology, including the quality and quantity of the water. The specifics involve: the emergence of new closed drainage catchments with a total area of 651.1 ha; an increase in the total watercourse length (from 0.9 to 5.7 km); an increase in the river network density (from 0.09 to 0.56 km km−2); a decrease in the number (from 81 to 48) and an increase in the area (from 23.8 to 58.4 ha) of lakes and ponds; an increase in the lake coverage ratio (from 2.5% to 6.1%) and in water pollution. Subsidence has limited the potential land uses, which led to a decrease in arable land from 619.0 to 122.5 ha that gave way to other land uses, including those equivalent to wasteland. Copyright © 2016 John Wiley & Sons, Ltd.
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The Late Vistulian and Holocene evolution of Jezioro Lake: a record of environmental change in southern Poland found in deposits and landforms
Maria Fajer,Jan Maciej Waga,Mariusz Rzętała,Artur Szymczyk,Małgorzata Nita,Robert Machowski,Martyna A. Rzetala,Marek Ruman +7 more
TL;DR: Jezioro Lake is the only natural lake in southern Poland outside mountainous areas to have existed continuously since the Pleistocene as discussed by the authors, and the lake did not disappear at that time, although its area decreased by a factor of 12 by the end of the period.
Floods in the Upper Part of Vistula and Odra River Basins in the 19th and 20th Centuries / Powodzie W Górnej Części Dorzeczy Wisły I Odry W XIX I XX Wieku
Stanislaw Czaja,Robert Machowski,Mariusz Rzętała +2 more
- 01 Dec 2014
TL;DR: The analysis conducted for the 19th and 20th centuries demonstrate that two main types of floods can be distinguished as mentioned in this paper, i.e., floods with a single flood wave peak and floods with two, three or more flood wave peaks.
The Development of Freshwater Deltas and their Environmental and Economic Significance / Rozwój I Znaczenie Środowiskowo-Użytkowe Delt W Zbiornikach Śródlądowych
Abstract: The article presents the results of studies concer ning the delta forms that arise as a result of the sedimentation of the debris fed to water bodies by watercourses. The study covered several dozen anthr opogenic water bodies in the Upper Silesia region, which is well known for its high degree of urbanisation and industrialisation. Basic research work included mor phometric measurements of deltas, analyses of the m echanical and chemical composition of delta sediments and analyses of the chemical composition of the common reed growing on the deltas. The research has demonstrate d that the deltas exhibit certain characteristics t ypical of anthropogenic forms that result from the pollutants found in watercourses. In delta sediments, grains of sand usually dominate, but in many cases the share of th e < 0.02 mm fraction is as high as ca. 30%. Sedimen ts often contain fine coal and other organic pollutants, whi ch is reflected by high weight loss on ignition. Th e content of trace elements in delta sediments is usually many t imes higher than the geochemical background for all types of sedimentary rocks. Deltas are an environment where pollutants accumulate and some of them are assimila ted by plants. The content of macro elements in common reed tissues from different deltas does not vary widel y while the content of trace elements often results from their content in the sediments. The material that forms d eltas can be extracted and in some cases even used as fuel.