The estimation of flood quantiles in ungauged sites using teaching-learning based optimization and artificial bee colony algorithms


Karadeniz Technical University, Faculty of Engineering, Department of Civil Engineering, 61080 Trabzon, Turkey


In this study, a regional flood frequency analysis (RFFA) was applied to 33 stream gauging stations in the Eastern Black Sea Basin, Turkey. Homogeneity of the region was determined by discordancy (Di) and heterogeneity measures (Hi) based on L-moments. Generalized extreme-value, lognormal, Pearson type III, and generalized logistic distributions were fitted to the flood data of the homogeneous region. Based on the appreciate distribution for the region, flood quantiles were estimated for return periods of T=5, 10, 25, 50, 100, and 500 years. A non linear regression model was then developed to determine the relationship between flood discharges and meteorological and hydrological characteristics of the catchment. In order to compare with regression analysis, artificial bee colony algorithm (ABC) and teaching-learning based optimization (TLBO) models were developed. The equations were obtained by using the ABC and TLBO algorithms for the estimation of flood discharges for different return periods. The analysis showed that the TLBO and ABC results were superior to the regression analysis. Error values indicated that TLBO method yielded better results for estimation of flood quantiles for different independent variables.


Main Subjects


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