Abstract:

It is important to determine the characteristics of drought events in river basins in terms of sustainable management. For this reason, index methods have been developed in order to define the characteristic features of drought events such as duration and severity. In the present study, meteorological and hydrological droughts of the Medar sub-basin in the Gediz basin were investigated by the most widely using standardized precipitation index (SPI), standardized precipitation evapotranspiration index (SPEI) and standardized runoff index (SRI) methods. Meteorological and hydrological droughts between 1971 and 2015, at monthly, 3 month, 6 month and 12 month time scales, were determined by using the meteorological data observed at Akhisar and Sarılar meteorological stations, which represent the basin, and the runoff values observed at the Medar Bridge over the Medar Stream. The characteristic features of droughts occurring in the relevant time periods are explained using Run theory. As a result of the study, the characteristic relationships of meteorological and hydrological droughts were determined.

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