Assessment and prediction of significant wave height using hybrid CNN-BiLSTM deep learning model for sustainable wave energy in Australia

Article


Raj, Nawin and Prakash, Reema. 2024. "Assessment and prediction of significant wave height using hybrid CNN-BiLSTM deep learning model for sustainable wave energy in Australia." Sustainable Horizons . 11. https://doi.org/10.1016/j.horiz.2024.100098
Article Title

Assessment and prediction of significant wave height using hybrid CNN-BiLSTM deep learning model for sustainable wave energy in Australia

Article CategoryArticle
AuthorsRaj, Nawin and Prakash, Reema
Journal TitleSustainable Horizons
Journal Citation11
Article Number100098
Number of Pages12
Year2024
PublisherElsevier
Place of PublicationNetherlands
ISSN2772-7378
Digital Object Identifier (DOI)https://doi.org/10.1016/j.horiz.2024.100098
Web Address (URL)https://www.sciencedirect.com/science/article/pii/S2772737824000105
Abstract

Wave energy is regarded as one of the powerful renewable energy sources and depends on the assessment of significant wave height (Hs) for feasibility. Hence, this study explores the potential of wave energy by assessing and predicting Hs for two study sites in Queensland (Emu Park and Townsville), Australia. Assessment and prediction of Hs is extremely important for reliable planning, cost management and implementation of wave energy projects. The study utilized oceanic datasets based on wave measurements obtained from buoys along coastal regions of Queensland that are transmitted to nearby receiver stations. The parameters of the datasets include maximum wave height, zero up crossing wave period, peak energy wave period and sea surface temperature to accurately predict Hs. A new hybrid Convolutional Neural Network (CNN) and Bidirectional Long Short Term (BiLSTM) deep learning model with Multivariate Variational Mode Decomposition (MVMD) is developed which is benchmarked by Multi-Layer Perceptron (MLP), Random Forest (RF) and Categorical Boosting (CatBoost) to compare the performance. All models attain relatively high-performance results. The MVMD-CNN-BiLSTM attains slightly better performance values for both study sites among all developed models with highest correlation values of 0.9957 and 0.9986 for Emu Park and Townsville, respectively. Other performance evaluation metrics were also higher for MVMD-CNN-BiLSTM with lowest error values in comparison to the benchmark models. The annual mean of Hs is also computed to compare and obtain an insight with a linear projection. There is a greater ocean wave energy potential for Emu Park for a 10-year period with a projected mean Hs of 0.865 m in comparison to Townsville where the projected mean was of 0.665 m.

KeywordsMultivariate Variational Mode Decomposition (MVMD) Convolutional Neural Network (CNN) Bidirectional LSTM (BiLSTM) Significant Wave Height (Hs) Intrinsic Mode Functions (IMFs)
Contains Sensitive ContentDoes not contain sensitive content
ANZSRC Field of Research 2020410401. Conservation and biodiversity
460207. Modelling and simulation
Byline AffiliationsSchool of Mathematics, Physics and Computing
University of the South Pacific, Fiji
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