Estimation of water quality in Korattur Lake, Chennai, India, using Bayesian optimization and machine learning

被引:0
|
作者
Zeng, Lingze [1 ,2 ]
机构
[1] Guangdong Univ Technol, Sch Environm Sci & Engn, Guangdong Key Lab Environm Catalysis & Hlth Risk C, Guangzhou, Peoples R China
[2] Guangzhou Wosu Environm Technol Co Ltd, Guangzhou, Peoples R China
关键词
machine learning; water quality level; Bayesian optimization; classification; environmental protection; PREDICTION; CLASSIFICATION; MODELS;
D O I
10.3389/fenvs.2024.1434703
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Assessing water quality becomes imperative to facilitate informed decision-making concerning the availability and accessibility of water resources in Korattur Lake, Chennai, India, which has been adversely affected by human actions. Although numerous state-of-the-art studies have made significant advancements in water quality classification, conventional methods for training machine learning model parameters still require substantial human and material resources. Hence, this study employs stochastic gradient descent (SGD), adaptive boosting (AdaBoosting), Perceptron, and artificial neural network algorithms to classify water quality categories as these well-established methods, combined with Bayesian optimization for hyperparameter tuning, provide a robust framework to demonstrate significant performance enhancements in water quality classification. The input features for model training from 2010 to 2019 comprise water parameters such as pH, phosphate, total dissolved solids (TDS), turbidity, nitrate, iron, chlorides, sodium, and chemical oxygen demand (COD). Bayesian optimization is employed to dynamically tune the hyperparameters of different machine learning algorithms and select the optimal algorithms with the best performance. Comparing the performance of different algorithms, AdaBoosting exhibits the highest performance in water quality level classification, as indicated by its superior accuracy (100%), precision (100%), recall (100%), and F1 score (100%). The top four important factors for water quality level classification are COD (0.684), phosphate (0.119), iron (0.112), and TDS (0.084). Additionally, variations or changes in phosphate levels are likely to coincide with similar variations in TDS levels.
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页数:14
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