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

Related subject area

Subject: Catchment hydrology | Techniques and Approaches: Modelling approaches
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Cited articles

An, H., and Yu, S.: Finite volume integrated surface- subsurface flow modeling on nonorthogonal grids, Water Resour. Res., 50, 2312–2328, 2014.
Blazek, J.: Computational fluid dynamics: Principles and applications, Elsevier, Oxford, UK, 2005.
Camporese, M., Paniconi, C., Putti, M., and Orlandini, S.: Surface-subsurface flow modeling with path-based runoff routing, boundary condition-based coupling, and assimilation of multisource observation data, Water Resour. Res., 46, W02512, https://doi.org/10.1029/2008WR007536, 2010.
Delfs, J. O., Park, C. H., and Kolditz, O.: A sensitivity analysis of Hortonian flow, Adv. Water Res., 32, 1386–1395, 2009.
de Rooij, R., Graham, W., and Maxwell, R.: A particle-tracking scheme for simulating pathlines in coupled surface-subsurface flows, Adv. Water Res., 52, 7–18, 2013a.
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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.