In: Journal of Hydrology and Hydromechanics, vol. 68, no. 2
Ladislav Holko - Michal Danko - Patrik Sleziak
Detaily:
Rok, strany: 2020, 192 - 199
Jazyk: eng
Kľúčové slová:
Oxygen isotope in precipitation and runoff; Time series; Trends and break points.
URL originálneho zdroja: http://www.ih.sav.sk/jhh
O článku:
δ18O in precipitation at station Liptovský Mikuláš (about 8.5 km south from the outlet of the Jalovecký Creek
catchment) remains constantly higher since 2014 that might be related to greater evaporation in the region of origin of
the air masses bringing precipitation to the studied part of central Europe. Increased δ18O values are reflected also in the
Jalovecký Creek catchment runoff. Seasonality of δ18O in the Jalovecký Creek became less pronounced since 2014. The
most significant trends found in annual hydrological data series from the catchment in the study period 1989–2018 have
the correlation coefficients 0.4 to 0.7. These trends are found in the number of flow reversals (change from increasing to
decreasing discharge and vice versa), June low flow, number of simple runoff events in summer months (June to September)
and the flashiness index. The attribution analysis suggests that drivers responsible for the changes in these data
series include the number of periods with precipitation six and more days long, total precipitation amount in February to
June, number of days with precipitation in June to September and total precipitation in May on days with daily totals 10
mm and more, respectively. The coefficients of determination show that linear regressions between the drivers and supposedly
changed data series explain only about 31% to 36% of the variability. Most of the change points detected in the
time series by the Wild Binary Segmentation method occur in the second and third decades of the study period. Both
hydrometric and isotopic data indicate that hydrological cycle in the catchment after 2014 became different than before.
Ako citovať:
ISO 690:
Holko, L., Danko, M., Sleziak, P. 2020. Analysis of changes in hydrological cycle of a pristine mountain catchment.
2. Isotopic data, trend and attribution analyses. In Journal of Hydrology and Hydromechanics, vol. 68, no.2, pp. 192-199. 0042-790X (until 2019) . DOI: https://doi.org/10.2478/johh-2020-0011
APA:
Holko, L., Danko, M., Sleziak, P. (2020). Analysis of changes in hydrological cycle of a pristine mountain catchment.
2. Isotopic data, trend and attribution analyses. Journal of Hydrology and Hydromechanics, 68(2), 192-199. 0042-790X (until 2019) . DOI: https://doi.org/10.2478/johh-2020-0011
O vydaní:
Vydavateľ: VEDA, Publishing House of the Slovak Academy of Sciences, Bratislava, Slovakia
Publikované: 15. 6. 2020