Long-Term Variability of the Hydrological Regime and Its Response to Climate Warming in the Zhizdra River Basin of the Eastern European Plain

Bai, B.; Huang, Q.; Wang, P.; Liu, S.; Zhang, Y.; Wang, T.; Pozdniakov, S.P.; Frolova, N.L.; Yu, J.

Авторы: Bai Bing, Huang Qiwei, Wang Ping, Liu Shiqi, Zhang Yichi, Wang Tianye, Pozdniakov Sergey P., Frolova Natalia L., Yu Jingjie
Журнал: Water
Том: 15
Номер: 15
Год издания: 2023
Издательство: MDPI Publishing
Местоположение издательства: Basel, Switzerland, Switzerland
Первая страница: 2678
Последняя страница: 2678
DOI: 10.3390/w15152678
Аннотация: Climate warming globally has a profound effect on the hydrological regime, amplifyingevapotranspiration and precipitation and accelerating the processes of snow melt and permafrostthaw. However, in the context of small river basins—those encompassing less than 10,000 km2—theresponse of the hydrological regime to climate change is intricate and has not yet been thoroughlyunderstood. In this study, the Zhizdra River Basin, a typical small river basin in the eastern Europeanplain with a total drainage area of 6940 km2, was selected to investigate the long-term variabilityof the hydrological regime and its responses to climate warming. Our results show that during theperiod of 1958–2016, the average runoff in the Zhizdra River Basin was approximately 170 mm, withsignificant fluctuations but no trend. Sensitivity analysis by the Budyko framework revealed that therunoff was more sensitive to changes in precipitation (P) compared to potential evapotranspiration(E0), implying that the Zhizdra River Basin is limited by water availability and has a slightly drytrend. A comprehensive analysis based on the seasonality of hydrometeorological data revealed thattemperature predominantly affects spring runoff, while P mainly controls autumn runoff. Both factorsmake significant contributions to winter runoff. In response to climate change, the nonuniformitycoefficient (Cv) and concentration ratio (Cn) of runoff have noticeably declined, indicating a morestabilized and evenly distributed runoff within the basin. The insights gleaned from this researchilluminate the complex hydrological responses of small river basins to climate change, underliningthe intricate interrelation among evapotranspiration, precipitation, and runoff. This understandingis pivotal for efficient water resource management and sustainable development in the era ofglobal warming.
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Long-Term Variability of the Hydrological Regime and Its Response to Climate Warming in the Zhizdra River Basin of the Eastern European Plainстатья

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