Post-flood field investigation of the June 2020 flash flood in the upper Muráň River basin and the catastrophic flash flood scenario

Abstract After a dry spring, in June 2020 several intense storms occurred at the headwaters of small basins Muráň and Zdychava rivers territory Muránska planina National Park (Slaná River basin, Slovakia). In first part study– according to hydrological survey made by authors after flash flood – peak discharge was reconstructed profiles. Next, waves were rainfall-runoff model NLC (non-linear cascade). The results modelling based on field investigations show that, despite extreme precipitation event (108 mm per 1 hour gauging station Predná Hora), flow rates not exceptional selected profiles River. fact that above 120 fell relatively very area division rivers’ water contributed this result. second part, catastrophic 1000-year rainfall scenario basin has been prepared. analysing time series identifying T -year daily depths, data used from six stations vicinity planina. Then, Revúca simulated calibrated model. such an scenario, rate would reach 105.15 m 3 s −1 , i.e. with specific runoff 1.78 km–2. total 18-hour period be 1.119 million representing 21.11% (5.301 ).