Evaluation of GPR-PSO and KNN-PSO data-mining models for prediction of suspended sediment concentration distribution
Author(s):
Article Type:
Research/Original Article (دارای رتبه معتبر)
Abstract:
The vertical distribution of suspended sediment concentration (SSC) is one of the most important parameters in the hydraulics of sediment transport in rivers. This parameter plays an important role in calculating the total sediment discharge in channels and rivers. For this reason, accurate measurement of this parameter has always been one of the goals of researchers. One way to accurately predict this parameter is to use intelligent models. For this purpose, in this study, four data mining models, KNN, KNN-PSO, GPR, and GPR-PSO, have been used to predict the distribution of sediment concentration (C/Ca). All models were coded in the MATLAB software environment. According to the results, it was found that the optimization performed on the KNN and GPR models was effective and increased the performance of these models. By comparing the models, it was shown that the GPR-PSO model has more accuracy than other models. The accuracy of this model in the training phase is equal to RMSE = 0.0297, R2 = 0.9878, and KGE = 0.9776, and in the testing phase equal to RMSE = 0.0226, R2 = 0.9907, and KGE = 0.9715. After GPR-PSO, the KNN-PSO model was ranked with RMSE = 0.0295, R2 = 0.9870, and KGE = 0.9864 in the training phase and RMSE = 0.0374, R2 = 0.9808, and KGE = 0.9569 in the testing phase. After the aforementioned models, GPR and KNN were respectively ranked. Also, by analyzing the results, it was determined that the two parameters y/D and y/a are the most important parameters in determining the most accurate results.
Keywords:
Language:
Persian
Published:
Iranian Journal of Soil and Water Research, Volume:56 Issue: 3, Jun 2025
Pages:
701 to 714
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