| الوصف: |
In drought monitoring and evaluationconditions, there are some discussions related to classical drought definitionsin using drought indices, which are frequently preferred in the literature. Thefirst is selecting the threshold level for the onset of drought. In the studiesconducted, it is seen that Run and SPI theories are frequently taken asreferences, and two different threshold levels are considered in thesemethodologies. For meteorological, agricultural, andhydrological droughts, the drought events in question are not fully compatibleand consistent, and sometimes even opposite situations that do not support eachother emerge. The main reason is the differences in drought definitions andmodels used in assessing relevant drought conditions. This research aims todiscuss the differences between meteorological-agricultural,agricultural-hydrological, and meteorological-hydrological droughts originatingfrom drought definitions. In this context, Manavgat station in the Antalyabasin, one of the most susceptible basins to drought in Türkiye, was selectedas the application area. The drought results of the Standardized PrecipitationIndex (SPI), one of the most widely used indices in the literature, between1969-2022, 3, 6, and 12-month time scales were examined and interpreted. In theevaluation of the results of the analysis, innovative drought classificationmatrices (IDCM) were used. As a result of the analysis, limited agriculturaland meteorological drought events were encountered in some processes wherelong-term hydrological drought events were experienced for both droughtdefinitions. Also , It is observed that there are results inwhich meteorological drought is not encountered in periods when agriculturaldrought events occur. Run theory is more consistent in evaluatinghydrological-meteorological and hydrological-agricultural drought events thanSPI theory. These results, on the one hand, show the importance of theconstraints related to definition and assumptions in terms of monitoring andevaluation of meteorological, ... |