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An enhanced monthly runoff forecasting using least squares support vector machine based on Harris hawks optimization and secondary decomposition

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Abstract

Accurate and reliable monthly runoff predictions are crucial for dispatching, allocation, and planning management of water resources. This research provides a hybrid forecasting model to increase the precision of monthly runoff predictions. Firstly, a series of intrinsic mode functions (IMF) and residual values are obtained from raw monthly runoff time series by applying complete ensemble empirical mode decomposition with adaptive noise (CEEMDAN). Secondly, variational mode decomposition (VMD) is used to perform a secondary decomposition of high-frequency IMFs. Thirdly, to determine the input–output relationships for all IMFs, Harris Hawks Optimization (HHO) algorithm is used to optimize least squares support vector machine (LSSVM) model. Finally, each IMF output is superimposed and reconstructed to obtain the final result. Five evaluation indicators are utilized to evaluate the effectiveness of the proposed hybrid model on monthly runoff data from Manwan and Hongjiadu Hydropowers in China. MAE, RMSE, MAPE, NSEC, and R of CEEMDAN-VMD-HHO-LSSVM model are 103.25, 137.29, 10.84, 0.98, and 0.99 in Manwan Hydropower and 18.28, 23.58, 28.49, 0.97 and 0.98 in Hongjiadu Hydropower, respectively. The five performance evaluation indicators of the proposed model exhibit excellent results when compared to those of other benchmarking models, demonstrating that the secondary decomposition can successfully extract the complex runoff sequence information so as to significantly increase the hybrid model's prediction accuracy.

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Data availability

The data that support the findings of this study are available from the corresponding author upon reasonable request.

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Funding

This work was supported by a Special project for collaborative innovation of science and technology in 2021 (No: 202121206) and Henan Province University Scientific and Technological Innovation Team (No: 18IRTSTHN009).

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Contributions

All authors contributed to the study Conceptualization and Methodology. Writing—original draft preparation, data collection and analysis were performed by Dong-mei Xu, Xiao-xue Hu, Wen-chuan Wang, Kwok-wing Chau, Bo Wang and Hong-fei Zang. All authors read and approved the final manuscript.

Corresponding author

Correspondence to Wen-chuan Wang.

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The authors have no relevant financial or non-financial interests to disclose.

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Communicated by H. Babaie.

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Xu, Dm., Hu, Xx., Wang, Wc. et al. An enhanced monthly runoff forecasting using least squares support vector machine based on Harris hawks optimization and secondary decomposition. Earth Sci Inform 16, 2089–2109 (2023). https://doi.org/10.1007/s12145-023-01018-3

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  • DOI: https://doi.org/10.1007/s12145-023-01018-3

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