Investigation of drought status of Konya Closed Basin with Percent of normal index

Abstract

In this study, meteorological drought situation of Konya Closed Basin was analyzed by PNI
method. In the analysis, annual total precipitation data covering the records of 11
meteorological stations in the basin between 1972 and 2020 were used. Drought classes
obtained from the analyzes made according to the PNI index were interpreted in the entire
data period and the results of the last years (2015-2020) were mapped using the Inverse
Distance Weighting (IDW) method. When the results were examined, it was determined that
2 of the 11 stations (Konya and Niğde stations) in the region had 4 extreme dry years at most.
According to the PNI method analyzes of the last 5 years of the basin, it was observed that the
driest year was 2020. The IDW map provides information about the spatial distribution of
results. When the IDW interpolation map of the results was examined, it was observed that
the drought values changed in our basin over time (2015-2020).