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Application and Sensitivity Analysis of Artificial Neural Network for Prediction of Chemical Oxygen Demand

Author

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  • Gebdang B. Ruben

    (Hohai University
    Hohai University)

  • Ke Zhang

    (Hohai University
    Hohai University)

  • Hongjun Bao

    (National Meteorological Center, China Meteorological Administration)

  • Xirong Ma

    (The Pearl River Hydraulic Research Institute)

Abstract

Integrating water quality forecasting model with river restoration techniques makes river restoration more effective and efficient. This research investigates how to use the Artificial Neural Network (ANN) to predict the Chemical Oxygen Demand (COD) during river restoration in Wuxi city, China. Specifically, we applied a Multi-Layer Perceptron (MLP) using ten neurons in a single hidden layer and seven input variables (Temperature, Dissolved Oxygen, Total Nitrogen, Total Phosphorus, Suspended Sediment, Transparency, and NH3-N) to simulate COD. The modeled results have a correlation coefficient of 0.966, 0.949, and 0.890 with the observations for the raining, validation, and testing phases, respectively. When presenting the trained network to an independent data set, the ANN model still shows a good predictive capability, indicating by a correlation coefficient of 0.978, a root mean square error (RMSE) of 0.628 mg/L, and a mean square error (MSE) of 0.394 mg2/L2. A sensitivity analysis was further implemented to analyze the effect of each of the input variables on prediction of COD. DO, TO, and Transparency have relatively low influences on the estimate of COD, and can be removed from the input variables. The results from this study indicate that ANN models can provide satisfactory estimates of COD during the process of bacterial treatment and is a useful supportive tool for river restoration.

Suggested Citation

  • Gebdang B. Ruben & Ke Zhang & Hongjun Bao & Xirong Ma, 2018. "Application and Sensitivity Analysis of Artificial Neural Network for Prediction of Chemical Oxygen Demand," Water Resources Management: An International Journal, Published for the European Water Resources Association (EWRA), Springer;European Water Resources Association (EWRA), vol. 32(1), pages 273-283, January.
    • Handle: RePEc:spr:waterr:v:32:y:2018:i:1:d:10.1007_s11269-017-1809-0
    DOI: 10.1007/s11269-017-1809-0
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    References listed on IDEAS

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    2. Sami Abdullah Osman & Meshal Almoshaogeh & Arshad Jamal & Fawaz Alharbi & Abdulhamid Al Mojil & Muhammad Abubakar Dalhat, 2022. "Intelligent Assessment of Pavement Condition Indices Using Artificial Neural Networks," Sustainability, MDPI, vol. 15(1), pages 1-30, December.
    3. Ozgur Kisi & Armin Azad & Hamed Kashi & Amir Saeedian & Seyed Ali Asghar Hashemi & Salar Ghorbani, 2019. "Modeling Groundwater Quality Parameters Using Hybrid Neuro-Fuzzy Methods," Water Resources Management: An International Journal, Published for the European Water Resources Association (EWRA), Springer;European Water Resources Association (EWRA), vol. 33(2), pages 847-861, January.

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