Impact of climate fluctuations on the spring runoff regime with regard to rivers in Lithuania

Journal of Water and Land Development

Lina Bagdži?nait?-Litvinaitien?Vilnius Gediminas Technical University, Department of Water Engineering, Saul?tekio al. 11, 10223 Vilnius, LithuaniaOther articles by this author:De Gruyter OnlineGoogle Scholar¹  Andrius LitvinaitisVilnius Gediminas Technical University, Department of Water Engineering, Saul?tekio al. 11, 10223 Vilnius, LithuaniaEmailOther articles by this author:De Gruyter OnlineGoogle Scholar¹ 

[1] Vilnius Gediminas Technical University, Department of Water Engineering, Saul?tekio al. 11, 10223 Vilnius, Lithuania

关键词: Keywords: climate change;    Mann-Kendall test;    river;    runoff regime;    trend;   

DOI  :  10.1515/jwld-2015-0009

学科分类：农业科学（综合）

来源: Instytut Technologiczno-Przyrodniczego / Institute of Technology and Life Sciences

【 摘 要 】

The article describes the impact of fluctuations in climatic factors on hydrological processes. The analysis of climate and hydrology covers two periods, the first up to 1996 and the second from 1981 to 2012. Study object includes 22 river basins situated on the eastern coast of the Baltic Sea: 1000 km2, up to 10 000 km2 and bigger. The study involved Mann–Kendall, Spearman's and linear regression tests. Causal relationships, as criteria that may fundamentally change the runoff regime set up by climatic factors, were established by evaluating the size of the river basin and assessing the spread of sediments, lakes, swamps and forests in the river basin. The analysis of data from the last thirty years disclosed that, with reference to the previously obtained information, floods in lakes became substantially reduced. Nevertheless, within the winter period of recent years, temperatures prevented lakes from acting as water reservoirs. The paper examined and defined the impact of sediments on variations in the runoff regime. For the period of the last thirty years, cut-off dates, i.e. flood start, crest and end, have advanced.

【 授权许可】

Unknown