The presented article presents a hydrological analysis of the extreme flood in September 2024 in the experimental catchments of the Slučí, Sokolí and Suchý brook, which are right-hand tributaries of the Černá Opava River. The interruption of monitoring and morphological changes in the riverbeds in these catchments due to the destruction of water-gauging stations forced the reconstruction of the flood using mathematical models, which is generally an obvious fact for the Jeseníky region with the greater or lesser meaning. The rainfall-runoff models HYDROG, HEC-HMS, MIKE SHE, SIMWE and the hydraulic models HEC-RAS and DHI MIKE were used for this analysis. The Mnichov hydrological station on the Černá Opava was chosen as the calibration profile. The causal precipitation belongs among the absolute measured records in the stations in several locations in the Jeseníky Mountains, and the propagation of the flood further down the Opava catchment represented an absolute maximum in the measured water level and evaluated flow for some stations. The situation was not different in the catchments of the Slučí, Sokolí and Suchý brook. The analyses also included a comparison of the results of individual rainfall-runoff models and the methods they implement, e.g. SCS-CN, Horton or Green-Ampt. The simulated hydrographs show good correlation between the measured and evaluated data, with the Nash-Sutcliffe coefficient not falling below 0.7, mostly due to the declining part of the flood hydrograph, when standard rainfall-runoff models are unable to simulate the slowdown of runoff due to water accumulation in inundation areas. For this and other reasons, it is appropriate to use a combination of rainfall-runoff and hydraulic models.

The aim of this research was to evaluate the impact of revitalization measures implemented in the catchments of the Vortovský Stream and the Valčice Stream, located within the protected landscape area of the Žďárské vrchy in the Pardubice Region, Czech Republic. The assessment was conducted using rainfall–runoff models HEC-HMS 4.13(The Hydrologic Engineering Center’s-Hydrologic Modeling System) and MIKE SHE version 2020 (MIKE System Hydrological European), and hydraulic models HEC-RAS 6.6 and MIKE 11 version 2020. The study focused on comparing the effects of revitalization on flow velocity in the Valčice Stream with its original state, evaluating the ability of the reconstructed ponds Malý Černý and Velký Černý to transform flood waves, and assessing the overall effectiveness of the revitalized areas in water retention within the landscape. The results demonstrate that the reconstruction of the ponds on the Valčice Stream significantly contributed to the safe transformation of flood flows, and that the revitalization of part of the stream resulted in a reduction in flow velocity in the channel. Furthermore, the revitalization measures in the Vortovský Stream catchment were found to have a positive effect on enhancing water retention in the area.

This study aims to provide a comprehensive assessment of the ecological status of two distinct sections of the Bílovka stream located in the Moravian-Silesian Region of the Czech Republic. The evaluation was conducted using the standardized HEM 2014 methodology, which assesses seventeen hydromorphological indicators across three spatial zones: the channel, the bank/riparian zone, and the floodplain. A comparative analysis between a near-natural reach and a section significantly modified by human activities revealed notable differences in ecological quality. The findings underscore the practical relevance of the HEM 2014 methodology for evaluating the current hydromorphological condition of watercourses and for informing the design of targeted restoration measures, particularly within urbanized landscapes.