Identification of homogeneous regions and regional frequency analysis for Turkey

Ward's hierarchical clustering method is applied to classify the annual oodsand identify the hydrologic homogeneous regions in turkey. for this aim, the annual ooddata obtained at the 117 gauging stations having data records of 31 years operated by thegeneral directorate of electrical power resources survey and development administration(eie) throughout turkey are considered. discordancy and regional homogeneity measuresare applied to test homogeneity of regions identied by ward's cluster method. floodfrequency analyses for seven sub-groups dened by ward's clustering method are carriedout using various frequency distributions based on index ood and l-moments approaches.the best t distributions for all sub-regions are identied based on l-moments goodnessof t statistic. the accuracy of results of quantile estimates are evaluated by using relativermse% and relative bias% through the use of monte carlo simulation