Trend and seasonality analysis of the maximum annual discharges in selected gauging stations at the Hron River basin

Year, pages: 2016, 224 - 234

Due to the increasing frequency and severity of flood events not only in Slovakia but also in the world, it is important to examine their behavior and regime in order to be able to properly and timely respond to risks that may result from these situations. In this paper we focused on seasonality and trend analysis by using directional statistics and modified Mann-Kendall test for maximum annual discharges in four gauging stations on the river Hron. The analysis of flood regime for Hron River was processed using the directional statistics (Burn, 1997) and the result is the determination of the mean date of flood situation (summer or winter) and the determination of flood variability measure. The result of directional statistics shows the strong seasonal occurrence of winter floods. The analysis of linear regression and break points shows decreasing trend and break points are located in years 1944, 1946 and 1974. When evaluating the series of maximum annual discharges we focused on trend analysis using the modified Mann-Kendall test for moving time window, which shows prevailing downward trend in all gauging stations.

Marková, R., Xhaja, A., Kohnová, S. 2016. Trend and seasonality analysis of the maximum annual discharges in selected gauging stations at the Hron River basin. In Acta Hydrologica Slovaca, vol. 17, no.2, pp. 224-234. 2644-4690.

Marková, R., Xhaja, A., Kohnová, S. (2016). Trend and seasonality analysis of the maximum annual discharges in selected gauging stations at the Hron River basin. Acta Hydrologica Slovaca, 17(2), 224-234. 2644-4690.