Quality classification 2 Water quality 2 Adaptive boosting 1 Biochemical oxygen demand 1 Decision trees 1 Development activity 1 Economics 1 Environmental protection 1 Forecasting 1 Gradient boosting 1 Kelantan Basin 1 Land use 1 Linear regression 1 Machine learning models 1 Machine learning techniques 1 Malaysia 1 Monitoring stations 1 Multivariant analysis 1 Multivariate statistical analysis 1 Nearest neighbor search 1 Neural networks 1 Random forests 1 Raw water supply 1 River basins 1 River pollution 1 Rivers 1 Statistical assessment 1 Supervised machine learning 1 Support vector machines 1 Water quality class 1