CONSIDERATIONS ON STREAMFLOW DROUGHT
IN CENTRAL ROMANIAN PLAIN
ADINA-ELIZA CROITORU , FLORENTINA MARIANA TOMA
ABSTRACT. – Considerations on Streamflow Drought In Central
Romanian Plain. As one of the most important hydrological phenomenon in the
area, streamflow drought was identified using daily discharge flow data series
for 30 years (1980-2009). The data were recorded in seven observation points
located on six rivers, in the central part of the Romanian Plain (between Olt
and Argeş rivers). Some aspects of duration and severity of the hydrological
drought events were calculated: number, average and maximum duration, daily
average discharge flow and streamflow deficit volume of hydrological drought
events. Mann-Kendall test and Sen’s slope estimation for trends detection were
applied in order to analyze trends of those features in the studied region. As
main conclusions: most part of the considered rivers show similar behavior with
general increasing trends of the most analyzed drought parameters; the only
exception is Glavacioc river, with decreasing slopes for the great majority of
the parameters. For the mean daily discharge flows, insignificant slopes were
calculated.
Keywords: hydrological drought, duration, severity, Mann-Kendall test and Sen’s
slope, Central Romanian Plain.