Nitra, Slovaca Universitas Agriculturae Nitriae All rights reserved application/pdf 2676665 bytes Abstract: The long-term runoff variability is identified to consist of the selected large rivers with long-term data series in the Danube River Basin. The rivers were selected in different regions of the Danube River Basin and have a large basin area (Danube: Bratislava gauge with 131,338 km2; Tisza: Senta with 141,715 km2; and Sava: Sremska Mitrovica with 87,966 km2). We worked with the station Danube: Reni in the delta as well. A spectral analysis was used to identify the long-term variability of three different types of time series: (1) Average annual discharge time series, (2) Minimum annual discharge time series and (3) Maximum annual discharge time series. The results of the study can be used in a long-term forecast of the runoff regime in the future. Long-term runoff variability analysis of rivers in the Danube basin eng Acta Horticulturae et Regiotecturae – Special Issue Nitra 24 https://unilib.phaidrabg.rs/o:244 doi:10.2478/ahr-2021-0008 ISSN: 1336-2563 info:eu-repo/semantics/article Pekárová, Pavla Mészáros, Jakub Miklánek, Pavol Pekár, Ján Prohaska, Stevan Ilić, Aleksandra 2021 Keywords: long-term discharge analysis, spectral analysis, Danube River Basin