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Precipitation analysis using Mann-Kendal test and WASP cumulated curve in Southeastern Romania. As one of the most important climatic elements, precipitation data were used in order to analyze the general trends in the amount of precipitation for a period of 30 years, in 4 weather stations of South-Eastern Romania: Constanţa, Medgidia, Sulina and Tulcea. They are located in different areas of a dry region, Dobrudja: on the shore, inside the land, on the Danube River banks and at the discharge point of the Danube River into the Black Sea. Mann-Kendall test and Sen’s slope estimation for trends detection and the cumulated curve of Weighted Anomaly of Standardized Precipitation for fluctuations were applied for the first time to analyze precipitation data sets in the studied region. As a main conclusion, three of the four analyzed locations (Constanţa, Medgidia and Tulcea) show similar behaviour while for Sulina different results were found both for Mann-Kendall test and Sen’s slope estimation and for WASP cumulated curve. Thus, for Sulina, decreasing trends are specific for the most part of the data series, while increasing trends characterize the great majority of the data sets for the other three stations. The analysis of fluctuations shows a decreasing trend until 1994-1995, followed by some small fluctuations with general increasing trends until the end of the period, for the three above-mentioned stations. For Sulina data series, a general upward trend was identified until December 1997 and after that an abrupt decrease until June 2004.

Keywords: precipitation, trends, Mann-Kendall test and Sen’s Slope estimates, cumulated curve of Weighted Anomaly of Standardized Precipitation, Southeastern Romania