Prof. Alina Bărbulescu
Department of Civil Engineering, Transilvania University of BrasovSpeech Title: From classical to modern methods in modeling hydrological time series
Abstract: Dams are critical infrastructures built for multiple purposes, such as electricity production, water supply, and irrigation. Building big dams significantly impacts population life, activity, and the natural ecosystems. River flow modifications are among their most obvious impacts on the environment. This presentation reviews the results of the methodology used in the analysis and modeling the water flow of one of the most important rivers in Romania, and the changes in the water flow due to building the Siriu Dam. Various techniques, including IHA indicators, multifractal analysis, decomposition models, and Intrinsic Mode Functions (IMFs), and AI where used for modeling the river discharge. Whereas the visualizations display evident oscillations in the river's monthly average discharge, the long-range dependence analysis indicates the various patterns of the river discharge. The study reveals that most techniques provide a good estimation of the series trend but fail to capture the maxima. All indicates the existence of two different patterns of the analyzed series, indicating 1984 as a change point.