RiverMamba: A State Space Model for Global River Discharge and Flood Forecasting

• URL: http://arxiv.org/abs/2505.22535v2
• Date: Thu, 29 May 2025 08:55:57 GMT
• Title: RiverMamba: A State Space Model for Global River Discharge and Flood Forecasting
• Authors: Mohamad Hakam Shams Eddin, Yikui Zhang, Stefan Kollet, Juergen Gall,
• Abstract summary: We present RiverMamba, a novel deep learning model that is pretrained with long-term reanalysis data.<n>To achieve this, RiverMamba leverages efficient Mamba blocks that enable the model to capture global-scale channel routing.<n>Our analysis demonstrates that RiverMamba delivers reliable predictions of river discharge, including extreme floods across return periods and lead times.
• Score: 11.045126693185377
• License: http://creativecommons.org/licenses/by-nc-sa/4.0/
• Abstract: Recent deep learning approaches for river discharge forecasting have improved the accuracy and efficiency in flood forecasting, enabling more reliable early warning systems for risk management. Nevertheless, existing deep learning approaches in hydrology remain largely confined to local-scale applications and do not leverage the inherent spatial connections of bodies of water. Thus, there is a strong need for new deep learning methodologies that are capable of modeling spatio-temporal relations to improve river discharge and flood forecasting for scientific and operational applications. To address this, we present RiverMamba, a novel deep learning model that is pretrained with long-term reanalysis data and that can forecast global river discharge and floods on a $0.05^\circ$ grid up to 7 days lead time, which is of high relevance in early warning. To achieve this, RiverMamba leverages efficient Mamba blocks that enable the model to capture global-scale channel network routing and enhance its forecast capability for longer lead times. The forecast blocks integrate ECMWF HRES meteorological forecasts, while accounting for their inaccuracies through spatio-temporal modeling. Our analysis demonstrates that RiverMamba delivers reliable predictions of river discharge, including extreme floods across return periods and lead times, surpassing both operational AI- and physics-based models.

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