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Application of random forest (RF) for flood levels prediction in Lower Ogun Basin, Nigeria

Author

Listed:
  • O. O. Aiyelokun

    (University of Ibadan)

  • O. D. Aiyelokun

    (Olivearc Solutions)

  • O. A. Agbede

    (University of Ibadan)

Abstract

This study evaluates the performance of random forest (RF) for predicting flood levels in the Lower Ogun Basin, Southwest Nigeria. Daily flood levels for a period of 36 years (1981 to 2016), recorded at Mokoloki weir, were obtained from the Ogun–Oshun River Basin Development Authority (OORBDA). Descriptive statistics were employed to provide concise information on the flood levels, and trend and autocorrelation assessments were performed using the Mann–Kendall test and the Ljung–Box test, respectively, at 95% confidence level. Antecedent daily flood levels of up to 7 days were selected as input features for the RF model to predict daily flood levels. To develop the RF model, the dataset was divided into train (70%), validation (15%), and test (15%). The performance of the RF model was evaluated using Mean Absolute Error (MAE), coefficient of determination (R2), Nash–Sutcliffe Efficiency Coefficient (NSEC), and Kling-Gupta efficiency (KGE). The study reveals that the highest flood level was 9.5 m, while 75% of the records were less or equal to 7.04 m. The flood level had a significant positive trend (tau = 0.19, 2-sided p value

Suggested Citation

  • O. O. Aiyelokun & O. D. Aiyelokun & O. A. Agbede, 2023. "Application of random forest (RF) for flood levels prediction in Lower Ogun Basin, Nigeria," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 119(3), pages 2179-2195, December.
    • Handle: RePEc:spr:nathaz:v:119:y:2023:i:3:d:10.1007_s11069-023-06211-7
    DOI: 10.1007/s11069-023-06211-7
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    References listed on IDEAS

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    2. Yonaba, R. & Koïta, M. & Mounirou, L.A. & Tazen, F. & Queloz, P. & Biaou, A.C. & Niang, D. & Zouré, C. & Karambiri, H. & Yacouba, H., 2021. "Spatial and transient modelling of land use/land cover (LULC) dynamics in a Sahelian landscape under semi-arid climate in northern Burkina Faso," Land Use Policy, Elsevier, vol. 103(C).
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