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Comparison of Multiple Linear Regression and Artificial Neural Network Models for the Prediction of Solid Waste Generation in Sri Lanka

In order to plan Solid Waste Management (SWM) in a sustainable way, reliable forecasting of generation 
of waste plays an important role. Predicting the quantity of generated waste is complex because it is affected by various influencing factors. 
In addition to population growth, economic development, household size, and employment changes would influence the solid waste generation interactively. 
The main objectives of this study are to identify significant factors influencing solid waste generation and to develop a model to predict solid waste 
generation in Sri Lanka. In this study, two predictive models, Multiple Linear Regression (MLR) Models and Artificial Neural Networks (ANN) were used. 
The MLR model which is a conventional method showed R2 values of 0.750, 0.544 and 0.769 for Biodegradable, Non-Biodegradable and Total waste, respectively. 
ANN model, a non-linear model showed R2 values of 0.846, 0.855 and 0.902 for Non-Biodegradable, Biodegradable and Total waste, respectively, which indicated 
higher predictive accuracy than MLR model. Therefore, in order to develop a prediction model with a higher predictive accuracy, ANN model is recommended.