Hydrograph and recession flows simulations using deep learning: Watershed uniqueness and objective functions

IF 3.1 Q2 GEOSCIENCES, MULTIDISCIPLINARY
Abhinav Gupta , Sean A. McKenna
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引用次数: 0

Abstract

This study examines streamflow simulations using deep learning (DL) to understand the information extraction capability of global DL models trained on multiple watersheds. The study separately examined the entire streamflow time series and recession flow predictions. It introduces a global–local (GL) modeling strategy, where the global model outputs are fed as input to a locally trained model, with the hypothesis that the local model can leverage watershed-specific information that the global model may miss. The GL models demonstrate enhanced accuracy in recession flow prediction for 20-30% of the watersheds compared to the global and local models. However, considering the entire hydrograph, the GL models often perform worse than the global model. Further, the DL models were trained on two different objective functions. The performance of the global model in a watershed depended strongly upon the objective function used. These results suggest that the performance of global models is affected by watershed uniqueness, suggesting that even a global DL model should be tailored to individual watersheds for optimal performance.

Abstract Image

使用深度学习的水文和衰退流模拟:分水岭唯一性和目标函数
本研究考察了使用深度学习(DL)的流模拟,以了解在多个流域上训练的全局深度学习模型的信息提取能力。该研究分别检查了整个流量时间序列和衰退流量预测。它引入了一种全局-局部(GL)建模策略,其中将全局模型的输出作为输入输入到局部训练的模型中,并假设局部模型可以利用全局模型可能遗漏的流域特定信息。与全局和局部模型相比,GL模型在预测20-30%流域的衰退流量方面显示出更高的准确性。然而,考虑到整个海线,GL模式往往比全球模式表现得更差。此外,深度学习模型在两个不同的目标函数上进行训练。在流域中,全局模型的性能很大程度上取决于所使用的目标函数。这些结果表明,全局模型的性能受到流域独特性的影响,这表明即使是全局DL模型也应该针对单个流域进行定制以获得最佳性能。
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来源期刊
Journal of Hydrology X
Journal of Hydrology X Environmental Science-Water Science and Technology
CiteScore
7.00
自引率
2.50%
发文量
20
审稿时长
25 weeks
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