Abstract
Hydrological situation on Slovak rivers from the point of view of hydrological drought assessment in the period 2011–2020
Highlights
Due to climate change, the topic of drought and water scarcity is an important issue in water management, including for example water resources for agriculture, various industries and surface water utilization in navigation, fishing, etc
According to Blaškovičová (2020), changes in long-term discharges in the years 2001–2015 compared to the reference period 1961–2000 coincide relatively well with the hydrological drought vulnerability map of Slovakia, which was created based on analyses of changes in long-term discharges for the reference period 1961–2000 compared to 1931–1980 time period
The evaluation of mean monthly discharges in the period 2001–2015 compared to the reference period 1961–2000 in this study showed a significant increase in discharges in January for almost the entire territory of Slovakia and a decrease in April and October
Summary
The mean monthly discharges are compared with the long-term mean monthly discharges for the reference period 1961–2000. Trend detection analysis of the mean monthly discharges in period 1961–2020 was concluded by Mann-Kendall trend test. The months of April, June, July, August and October were detected as the months with the highest occurrence of mean monthly discharges below 40% long – term mean monthly discharges for the reference period. The trend analysis of the mean monthly discharges confirmed significant decreasing trend in April, May, June, July and August. These results reinforce the need of continuous monitoring of the mean monthly discharges.
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