CONSIDERATIONS REGARDING THE IMPACT OF THE GLOBAL CLIMATIC CHANGES ON THE MEAN DISCHARGES IN THE UPPER BASIN OF BÂRLAD RIVER
Journal Title: Present Environment and Sustainable Development - Year 2010, Vol 4, Issue 4
Abstract
Assessing the potential impact of climate changes on a hydrologic time serie is based on identifying the trend of the annual mean discharges. Time series of annual mean liquid discharges from all the hydrometric posts situated in the pper basin of Bârlad river are studied: Băceşti and Negreşti on Bârlad (1950 – 2007), Ţibana and Tungujei on Şacovăţ (1987 – 2007), Frenciugi and Căzăneşti on Stavnic (1950 – 2007). Parametric (linear, second degree polynomial and exponential equations) and non-parametric methods (Mann-Kendall test and Sen’s slope) are applied in order to detect a trend in data. The parametric testing shows that the polynomial model is the most apropiate, which means that during the interannual evolution of discharges a natural fluctuation seems to be more probable that an effect of the climate warming. The results of the non-parametric tests do not show a trend in data. We can conclude that in the studied area there is no clear impact of the climate change upon the annual mean liquid discharges.
Authors and Affiliations
Roxana Hobai
Keywords
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