Ádám NÁDUDVARI & Agnieszka CZAJKA
Faculty of Earth Sciences, University of Silesia, Będzińska 60, 41-200 Sosnowiec, E-mail: adam17183@gmail.com, agnieszka.czajka@us.edu.pl

STATISTICAL CALCULATIONS OF THE TISZA RIVER CHANNEL CHANGES ALONG VEZSENY AND MARTFŰ (HUNGARY) FROM 1873-2010

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The study presents the channel changes along a 17km length of a Tisza River bend by Martfű. Along the study we were trying to answer the question - what kind of deformations were caused by anthropogenic regulations (such as bank revetments) along the examined river channel in horizontal and vertical aspects in the post-engineering times. Furthermore, the objective was to determine in detail how the river channel regulation works influenced the channel parameters like reach length (LR), Chord length (H), Width (W) and the profile of cross sections. Different aspects of the analyzed river bend were identified. The results show that, the regulation works influenced the geomorphology of the channel, e.g. decrease in average width of the channel, the level of low water levels decreased in the period of 1911-1920 and in 1921-1930 no negative values were recorded after the regulation of the riffle. The cross section areas by the revetments decreased more intensively than the non-stabilized cross section areas. After the stabilization works - by the 1^st, 4^th, and 6^th sections -, the midstream has been growing by the 2^nd and 3^rd sections between 312-310 km^-s. As a result of increased erosion a cutbank has been developing between 311-310 km^-s.