Time series forecasting of river flow using an integrated approach of wavelet multi-resolution analysis and evolutionary data-driven models. A case study: Sebaou River (Algeria) |
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Authors: | Mousaab Zakhrouf Hamid Bouchelkia Madani Stamboul Sungwon Kim Salim Heddam |
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Institution: | 1. URMER Laboratory, Faculty of Technology, Department of Hydraulics, University of Tlemcen, Tlemcen, Algeria;2. Research Laboratory of Water Resources, Soil and Environment, Faculty of Architecture and Civil Engineering, Department of Civil Engineering, Amar Telidji University, Laghouat, Algeria;3. Department of Railroad Construction and Safety Engineering, Dongyang University, Yeongju, South Korea;4. Faculty of Science, Department of Agronomy, Hydraulics Division, University 20 Aout 1955, Skikda, Algeria |
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Abstract: | The complexity of hydrological processes and lack of data for modeling require the use of specific tools for non-linear natural phenomenon. In this paper, an effort has been made to develop a conjunction model – wavelet transformation, data-driven models, and genetic algorithm (GA) – for forecasting the daily flow of a river in northern Algeria using the time series of runoff. This catchment has a semi-arid climate and strong variability in runoff. The original time series was decomposed into multi-frequency time series by wavelet transform algorithm and used as inputs to artificial neural networks (ANN) and adaptive neuro-fuzzy inference system (ANFIS) models. Several factors must be optimized to determine the best model structures. Wavelet-based data-driven models using a GA are designed to optimize model structure. The performances of wavelet-based data-driven models (i.e. WANFIS and WANN) were superior to those of conventional models. WANFIS (RMSE = 12.15 m3/s, EC = 87.32%, R = .934) and WANN (RMSE = 15.73 m3/s, EC = 78.83%, R = .888) models improved the performances of ANFIS (RMSE = 23.13 m3/s, EC = 54.11%, R = .748) and ANN (RMSE = 22.43 m3/s, EC = 56.90%, R = .755) during the test period. |
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Keywords: | Time series forecasting wavelet transform artificial neural networks adaptive neuro-fuzzy inference system genetic algorithm Algeria |
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