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A hybrid PCA-SEM-ANN model for the prediction of water use efficiency

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  • Lu, Na
  • Niu, Jun
  • Kang, Shaozhong
  • Singh, Shailesh Kumar
  • Du, Taisheng

Abstract

This study employs a Structural Equation Model (SEM), Principal Component Analysis (PCA) and Artificial Neural Network (ANN) to construct a hybrid PCA-SEM-ANN model, for the prediction of Water Use Efficiency (WUE). The structural relationship and the degree of influence among factors is determined by SEM, and is transformed into ANN's topology, where PCA is employed to reduce spatial dimensionality. The applied results, in Kashgar, Xinjiang, China, show that different influencing factors on WUE present a diversity with different levels. The ANN structure optimized by SEM fits better, and the PCA-SEM-ANN model has high explanatory and precision for environmental control of the ecosystem as well as WUE simulation. The model can be widely applied to the vegetation ecosystem in the entire Xinjiang or elsewhere, providing a theoretical basis and a simulation method for improving the efficient water use capacity as well as predicting the future response of WUE to climate change.

Suggested Citation

  • Lu, Na & Niu, Jun & Kang, Shaozhong & Singh, Shailesh Kumar & Du, Taisheng, 2021. "A hybrid PCA-SEM-ANN model for the prediction of water use efficiency," Ecological Modelling, Elsevier, vol. 460(C).
    • Handle: RePEc:eee:ecomod:v:460:y:2021:i:c:s0304380021003033
    DOI: 10.1016/j.ecolmodel.2021.109754
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    Keywords

    SEM; PCA; ANN; WUE; Vegetation ecosystem;
    All these keywords.

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