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The utilisation of conceptual and data-driven models for hydrological modelling in semi-arid and humid areas of the Antalya basin in Turkey

Sezen Cenk, Partal Turgay

Acta Geophysica

2022

Vol. 70, no 2

897--915

Hydrological modelling is essential for improving water management and planning efficiency and sustainability. In this study, lumped conceptual models [i.e., Génie Rural à 4 paramètres Journalier (GR4J), Génie Rural à 6 paramètres Journalier (GR6J)] and wavelet-based data-driven models [Wavelet-Genetic algorithm-Artifcial neural network (WGANN), Wavelet-based support vector regression (WSVR)] were used for daily rainfall-runoff modelling by using three gauging stations, namely Çaydere Eğirdir Göl Giriş, Kargı Ç. Türkler and Naras D. Şişeler, in semi-arid and humid areas of Antalya basin, Turkey. The Nash Sutcliffe efficiency (NSE), index of agreement (d) and root mean square error (RMSE) were used to evaluate the model performance. Although conceptual and data-driven models yielded a good performance, data-driven models could be more helpful, especially in semi-arid and small basins, challenging for conceptual models due to nonlinearity and complexity. The best runoff forecasting performance improvement was observed in Çaydere Eğirdir Göl Giriş with the WGANN (NSE=0.96, d=0.99, RMSE=0.5 mm/d), WSVR (NSE=0.95, d=0.99, RMSE=0.6 mm/d) against the GR4J (NSE=0.53, d=0.79, RMSE=1.8 mm/d) and the GR6J (NSE=0.49, d=0.78, RMSE=1.8 mm/d). It was also found that the GR4J and GR6J yielded a similar performance. Data denoising via wavelet transformation and input selection had a significant role in developing performance for the data-driven models. Data-driven models yielded better results for the forecasting of extreme flows. In this regard, using and integrating the useful parts of the conceptual and data-driven models could be more favourable.