Application of artificial neural network (ANN)-self-organizing map (SOM) for the categorization of water, soil and sediment quality in petrochemical regions

Authors:
Richard Olawoyin;Antonio Nieto;Robert Larry Grayson;Frank Hardisty;Samuel Oyewole
Affiliations:
Department of Energy and Mineral Engineering, Pennsylvania State University, University Park, PA 16802, USA;Department of Energy and Mineral Engineering, Pennsylvania State University, University Park, PA 16802, USA;Department of Energy and Mineral Engineering, Pennsylvania State University, University Park, PA 16802, USA;Geo-Vista Center, Department of Geography, Pennsylvania State University, University Park, PA 16802, USA;Environmental, Health and Safety Engineering, Pennsylvania State University, University Park, PA 16802, USA
Venue:
Expert Systems with Applications: An International Journal
Year:
2013

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Abstract

The utilization of mathematical and computational tools for pollutant assessment frameworks has become increasingly valuable due to the capability to interpret integrated variable measurements. Artificial neural networks (ANNs) are considered as dependable and inexpensive techniques for data interpretation and prediction. The self-organizing map (SOM) is an unsupervised ANN used for data training to classify and effectively recognize patterns embedded in the input data space. Application of SOM-ANN is useful for recognizing spatial patterns in contaminated zones by integrating chemical, physical, ecotoxicological and toxicokinetic variables in the identification of pollution sources and similarities in the quality of the samples. Water (n=11), soil (n=38) and sediment (n=54) samples from four areas in the Niger Delta (Nigeria) were classified based on their chemical, toxicological and physical variables applying the SOM. The results obtained in this study provided valuable assessment using the SOM visualization capabilities and highlighted zones of priority that might require additional investigations and also provide productive pathway for effective decision making and remedial actions.