On future changes in the long-term seasonal discharges in selected basins of Slovakia

Abstract

Climate change and its impact on hydrological characteristics is a research topic of increasing interest. Studies that examine historical, current or future changes in hydrological regimes are important for understanding future changes in the water balance and its components. This study analyses changes in long-term discharges in the summer and winter halfyear and the baseflow index for eight selected river basins in Slovakia till 2100. For the analysis, data observed from the period 1981-2010 were used to calibrate the HBV-type rainfall-runoff TUW model. To simulate future discharges up to the 2100 horizon, two climate scenarios were used, i.e., the Dutch KNMI and the German MPI. The analysis was performed for four selected periods with a duration of 30 years. The results point to the most significant changes in the increase in long-term seasonal discharges in the winter half-year by 2100. In the future, the summer period will probably be characterised by a reduction in long-term seasonal discharges and decrease in the base flow index in all of the basins analysed.

Analysis of long-term trends and probability characteristics of low-flow in Low Tatra Mountains

“…The determination and assessment of T-year minimum discharges and low water content at water measuring stations in Slovakia were governed by OTN 3113-1 (2007), with the current proposed regulation being OTN ŽP 3113-1:04. Older studies pertaining to the characterization of small water bodies and low water content in Slovak streams can be found in the works of Szolgay (1977), Drako and Majerčáková (1989), Balco (1990), Majerčáková et al (1995;1997), Lešková (1997), Grešková (1998;1999), or Demeterová and Škoda (2004;2009), as well as more recent works by Fendeková and Fendek (1999), Fendeková et al (2014; or Sabová and Kohnová (2023). In the monograph, Lešková (1997) published probability characteristics of low flow in 20 water gauging stations in Slovakia, which were selected for the FRIEND project.…”

Impact of selected sampling method on resulting value of discharge area in a lowland stream with aquatic vegetation

“…Measurements or determination of stream discharges have an irreplaceable role in solving a wide range of tasks in water management and engineering hydrology. This kind of data are essential for water management authorities who need to know how much water they can manage and how, for ecologists who try to maintain rivers in a good ecological state, for civil engineers who design various engineering structures (e.g., bridges, dams, flood protection), as well as for hydrologists who analyse the records to better understand runoff generation processes (Almikaeel et al, 2022;Halmová et al, 2022;Almikaeel et al, 2023;Sabová and Kohnová, 2023). Today, there are various instruments and methods for field measurements of discharge value in natural water bodies.…”

A comparative analysis of continuous and event-based hydrological modeling for streamflow hydrograph prediction

“…While each model has its own advantages and disadvantages, the HBV model is able to simulate RR modeling as CS and EB. This model has been used for water balance (Erlandsen et al, 2021), climate change (Djebbi and Dakhlaoui, 2023;Sabova and Kohnova, 2023), and related simulations concerning groundwater (Wang et al, 2021). Previous studies revealed that the HBV model was successfully applied in different basins throughout the world due to its robustness, simplicity, and reliability.…”