THE IMPACT OF THE PERIODS OF PLUVIOMETRIC SURPLUS AND DEFICIT
 ON THE ENVIRONMENT IN THE PLAIN OF TÂRGOVIŞTE

Sencovici Mihaela, Valahia University of Targoviste, Romania

Abstract

The study of the periods of pluviometric surplus relied on the calculation and interpretation of the annual, seasonal and monthly values of the Weighted Anomaly of Standardized Precipitation (WASP). We considered as cases of pluviometric surplus the situations in which the WASP value went over 1.0. The precipitation data come from a number of two meteorological stations, covering a period of 47 years (1961-2007). In order to distinguish the importance of the precipitation deficit and the succession of the periods of pluviometric deficit, we calculated the negative deviations of the annual, seasonal and monthly quantities compared to the multiannual average considered normal. We have used the Weighted Anomaly of Standardized Precipitation (WASP) applied to the data coming from 2 meteorological stations (Titu and Târgovişte), for the interval 1963-2007. The frequency of the surplus years ranges between 26% (Târgovişte) and 22.7% (Titu), values that are lower than those of the years of precipitation deficit (WASP<-0.5). The normal years from a pluviometric perspective (WASP ranging between -0.5 and 0.5) are predominant in the entire plain region, their frequency varying between 44.7% in Târgovişte and 46.8% in Titu. Exceptionally arid and excessively arid years do not exist; the frequency increases from the very arid years (4.3%) to the arid years (10.6%; 12.8%) and a little arid years (14.9-12.8%). The highest frequency of the years that are a little arid (14.9%) has been recorded in Târgovişte. The surplus and the deficit of humidity lead to a series of negative effects on the environment.