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http://dx.doi.org/10.21729/ksds.2021.14.4.17

LSTM Prediction of Streamflow during Peak Rainfall of Piney River  

Kareem, Kola Yusuff (Dept. of Advance Science and Technology Convergence, Kyungpook National Univ.)
Seong, Yeonjeong (Dept. of Advance Science and Technology Convergence, Kyungpook National Univ.)
Jung, Younghun (Dept. of Advance Science and Technology Convergence, Kyungpook National Univ.)
Publication Information
Journal of Korean Society of Disaster and Security / v.14, no.4, 2021 , pp. 17-27 More about this Journal
Abstract
Streamflow prediction is a very vital disaster mitigation approach for effective flood management and water resources planning. Lately, torrential rainfall caused by climate change has been reported to have increased globally, thereby causing enormous infrastructural loss, properties and lives. This study evaluates the contribution of rainfall to streamflow prediction in normal and peak rainfall scenarios, typical of the recent flood at Piney Resort in Vernon, Hickman County, Tennessee, United States. Daily streamflow, water level, and rainfall data for 20 years (2000-2019) from two USGS gage stations (03602500 upstream and 03599500 downstream) of the Piney River watershed were obtained, preprocesssed and fitted with Long short term memory (LSTM) model. Tensorflow and Keras machine learning frameworks were used with Python to predict streamflow values with a sequence size of 14 days, to determine whether the model could have predicted the flooding event in August 21, 2021. Model skill analysis showed that LSTM model with full data (water level, streamflow and rainfall) performed better than the Naive Model except some rainfall models, indicating that only rainfall is insufficient for streamflow prediction. The final LSTM model recorded optimal NSE and RMSE values of 0.68 and 13.84 m3/s and predicted peak flow with the lowest prediction error of 11.6%, indicating that the final model could have predicted the flood on August 24, 2021 given a peak rainfall scenario. Adequate knowledge of rainfall patterns will guide hydrologists and disaster prevention managers in designing efficient early warning systems and policies aimed at mitigating flood risks.
Keywords
Flood management; Disaster mitigation; Deep learning; Streamflow; LSTM;
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