A Simple Baseline for Adversarial Domain Adaptation-based Unsupervised Flood Forecasting

• URL: http://arxiv.org/abs/2206.08105v1
• Date: Thu, 16 Jun 2022 11:58:52 GMT
• Title: A Simple Baseline for Adversarial Domain Adaptation-based Unsupervised Flood Forecasting
• Authors: Delong Chen, Ruizhi Zhou, Yanling Pan, and Fan Liu
• Abstract summary: Flood Domain Adaptation Network (FloodDAN) is a baseline of applying Unsupervised Domain Adaptation (UDA) to the flood forecasting problem. FloodDAN can perform flood forecasting effectively with zero target domain supervision.
• Score: 6.05061968456464
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Flood disasters cause enormous social and economic losses. However, both traditional physical models and learning-based flood forecasting models require massive historical flood data to train the model parameters. When come to some new site that does not have sufficient historical data, the model performance will drop dramatically due to overfitting. This technical report presents a Flood Domain Adaptation Network (FloodDAN), a baseline of applying Unsupervised Domain Adaptation (UDA) to the flood forecasting problem. Specifically, training of FloodDAN includes two stages: in the first stage, we train a rainfall encoder and a prediction head to learn general transferable hydrological knowledge on large-scale source domain data; in the second stage, we transfer the knowledge in the pretrained encoder into the rainfall encoder of target domain through adversarial domain alignment. During inference, we utilize the target domain rainfall encoder trained in the second stage and the prediction head trained in the first stage to get flood forecasting predictions. Experimental results on Tunxi and Changhua flood dataset show that FloodDAN can perform flood forecasting effectively with zero target domain supervision. The performance of the FloodDAN is on par with supervised models that uses 450-500 hours of supervision.

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