SIGNIFICANT FLOODS ON THE UPPER TISZA/TISA
AND ALONG THE LOWER SZAMOS/SOMEŞ RIVER (FROM 1876 ONWARDS)

K. KONECSNY

ABSTRACT. - Significant floods on the Upper Tisza/Tisa and along the lower Szamos/Someş river (from 1876 onwards). Dealing with floodwave propagationon rivers, as well as flooding related phenomena, planning of engineering works to moderate the dangers of flooding, dealing with flood hazard and risk, necessitates the knowledge of the affected rivers in terms of historical hydrological regime, hydrological patterns and specifically of data pertaining to significant flood events and their consequences. Several of the older but alsothe more recent scholarly articles about the left side tributaries of the Tisa river published incomplete or false figures about the major flood events of the period covered by systematic hydrometric flow records. The afore mentioned issues inspired the collation and analysis of data published in Hungarian and Romanian hydrological yearbooks and the relevant professional publications and the creation of a flood chronology. The continuous and reliable hydrometric data collection on the basin of the Upper Tisa and the lower Someş basin goes back to 1876 the publication of the first Hungarian hydrological yearbook. Based on this information we have highlighted the significant flood events, charted their occurance patterns, and the changes of the flood trends. We discussed the pecularities of the greatest flood waves and their consequences in greater detail.

Keywords: significant flood events, floodwave, hydrometric data, historical maximum water level, flood control activity

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