Articles | Volume 27, issue 9
https://doi.org/10.5194/hess-27-1827-2023
https://doi.org/10.5194/hess-27-1827-2023
Research article
 | 
09 May 2023
Research article |  | 09 May 2023

A signal-processing-based interpretation of the Nash–Sutcliffe efficiency

Le Duc and Yohei Sawada

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Latest update: 27 Feb 2024
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Short summary
The Nash–Sutcliffe efficiency (NSE) is a widely used score in hydrology, but it is not common in the other environmental sciences. One of the reasons for its unpopularity is that its scientific meaning is somehow unclear in the literature. This study attempts to establish a solid foundation for NSE from the viewpoint of signal progressing. This approach is shown to yield profound explanations to many open problems related to NSE. A generalized NSE that can be used in general cases is proposed.