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Hydrological drought assessment of the Tisza river

2020; Geographical Institute "Jovan Cvijić" SASA; Volume: 70; Issue: 2 Linguagem: Inglês

10.2298/ijgi2002089l

1821-2808

Igor Leščešen, Dragan Dolinaj, Milana Pantelić, Tamás Telbisz, György Varga,

Geophysics and Gravity Measurements

Drought is a natural phenomenon that occurs when the availability of water is significantly below the normal levels during a shorter or longer period of time and cannot meet the necessary demand. This study focused on hydrological drought assessment of the Tisza River on four gauging stations: Vásárosnamény, Szolnok, Szeged, and Senta for the period 1964-2018. An effective Streamflow Drought Index (SDI) has been recently proposed and widely used for determining hydrological droughts. Both long- and short-term droughts have very severe impacts on the investigated locations. Two drought periods can be singled out: the first period was from 1983 to 1993, with the exceptions in 1985 and 1987. This period is characterized by higher absolute SDI values on Vásárosnamény (-0.84) and Szolnok (-0.87) than on Szeged (-0.29) and Senta (-0.40) stations. The second period was more severe and lasted from 2011 to 2015, with an average SDI value of -1.32 on Vásárosnamény, -1.08 on Szolnok, -0.53 on Szeged, and -0.57 on Senta station. The Mann-Kendall test results indicate that there is no trend indicating transition from humid towards more arid condition over the investigated period.