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Predicting Flood Water Level Using Combined Hybrid Model of Rainfall-Runoff and AI-Based Models

  • Water Resources and Hydrologic Engineering
  • Published:
KSCE Journal of Civil Engineering Aims and scope

Abstract

Vietnam faces on significant human and property losses from floods almost every year. Therefore, the aim of this study is to provide timely and highly accurate flood prediction information using a developed hybrid model by combination of the rainfall-runoff model and AI-based model. We used Tank model as a rainfall-runoff model for peak flood discharge and parameter calibration was conducted by GA (genetic algorithm) and PS (pattern search). The sum of squared residuals (SSR) and weighted sum of squared residuals (WSSR) as objective functions were used for peak flood discharge evaluation. The simulated flood discharge was converted as flood water level by rating curve and Monte Carlo simulation was applied to estimate the confidence bounds for 95% confidence level. These estimates were then utilized as input data for the AI-based models to identify the strengths and weaknesses of each model and develop an optimal flood water level prediction model. Two AI-based models, deep neural network (DNN) and long short-term memory (LSTM), were used for flood water level prediction. The LSTM model demonstrated the best performance with a correlation coefficient (CC) of 0.98, normalized root mean square error (NRMSE) of 0.04, and Nash-Sutcliffe efficiency (NSE) of 0.98.

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Acknowledgments

This work was supported by INHA UNIVERSITY Research Grant (Grant Number 68859-1).

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Correspondence to Hung Soo Kim.

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Kim, D., Han, H., Lee, H. et al. Predicting Flood Water Level Using Combined Hybrid Model of Rainfall-Runoff and AI-Based Models. KSCE J Civ Eng 28, 1580–1593 (2024). https://doi.org/10.1007/s12205-023-1147-0

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  • DOI: https://doi.org/10.1007/s12205-023-1147-0

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