Articles | Volume 21, issue 11
Hydrol. Earth Syst. Sci., 21, 5709–5724, 2017
https://doi.org/10.5194/hess-21-5709-2017
Hydrol. Earth Syst. Sci., 21, 5709–5724, 2017
https://doi.org/10.5194/hess-21-5709-2017
Research article
17 Nov 2017
Research article | 17 Nov 2017

New insights into the differences between the dual node approach and the common node approach for coupling surface–subsurface flow

Rob de Rooij

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Latest update: 08 Aug 2022
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Short summary
The dual node and common node approach are widely used to simulate coupled surface–subsurface flows. In this study it is shown that the dual node approach should be conceptualized as a one-sided finite difference approximation of the vertical head gradients at the land surface. This consistent dual node approach can be more accurate as well as as more numerically efficient than the common node approach.