DBPapers
DOI: 10.5593/SGEM2014/B31/S12.065

ON USE OF DROUGHT INDICES IN MODELLING HYDROLOGICAL PROCESSES

I. Semenova, V. Ovcharuk, J. Shakhirzanova
Wednesday 1 October 2014 by Libadmin2014

References: 14th International Multidisciplinary Scientific GeoConference SGEM 2014, www.sgem.org, SGEM2014 Conference Proceedings, ISBN 978-619-7105-13-1 / ISSN 1314-2704, June 19-25, 2014, Book 3, Vol. 1, 503-510 pp

ABSTRACT
The study considers possibility of use of the drought index SPEI (Standardized Precipitation Evapotranspiration Index) in the analysis and modeling of hydrological processes in the southern Ukraine. The SPEI of various time scale was analyzed for the period of 1950-2010 in the Steppe zone of Ukraine. Time series of the SPEI at scales from 12 to 24 months have an inverse trend in West and East Steppe. In West Steppe the driest period occurred in the two latest decades. On the contrary, in the East Steppe more droughts were observed in the decades of 1950-1970. Statistical relationship between the SPEI of different time scales and some phases of the Southern Bug river flow has been estimated for the period of 1950-2010.

Keywords: Standardized Precipitation Evapotranspiration Index, runoff, drought, highand low-water phase