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Yin, Hanlin; Zhang, Xiuwei; Wang, Fandu; Zhang, Yanning; Xia, Runliang; Jin, Jin
Journal of hydrology (Amsterdam), July 2021, 2021-07-00, Volume: 598Journal Article
•A new seq2seq rainfall-runoff model named LSTM-MSV-S2S is proposed.•LSTM-MSV-S2S has promising performance on the CAMELS data set.•LSTM-MSV-S2S is more appropriate for multi-day-ahead runoff predictions. Rainfall-runoff modeling is a challenging and important nonlinear time series problem in hydrological sciences. Recently, among the data-driven rainfall-runoff models, those ones based on the long short-term memory (LSTM) network show good performance. Furthermore, LSTM-based sequence-to-sequence (LSTM-S2S) models achieve promising performance for multi-step-ahead runoff predictions. In this paper, for multi-day-ahead runoff predictions, we propose a novel data-driven model named LSTM-based multi-state-vector sequence-to-sequence (LSTM-MSV-S2S) rainfall-runoff model, which contains m multiple state vectors for m-step-ahead runoff predictions. It differs from the existing LSTM-S2S rainfall-runoff models using only one state vector and is more appropriate for multi-day-ahead runoff predictions. To show its performance and advantages, we compare it with two LSTM-S2S models by testing them on 673 basins of the Catchment Attributes and Meteorology for Large-Sample Studies (CAMELS) data set. The results show that our LSTM-MSV-S2S model has better performance in general and thus using multiple state vectors is more appropriate for multi-day-ahead runoff predictions.
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