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Regarding Lateral flows between neighboring pixels #192

@Hrekhani97

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@Hrekhani97

Dear @StefaniaGrimaldi,
I have a general question regarding the treatment of lateral flows in the LISFLOOD Open Source model. While reviewing related literature, I came across the following statement in a paper published in 2012 (DOI:10.5194/hess-16-3435-2012):

"However, with a larger number of assimilated discharge gauges, both the forecasted and updated PDFs of SM, UZ, and LZ had more accurate peaks around their true values. Therefore, it makes sense to update those rather insensitive model states. The reason for this behaviour might be the limited model structure, which is similar to other PCRaster operational hydrological applications like the LISFLOOD model (de Roo et al., 2000; Salamon and Feyen, 2009), where the individual neighbouring model cells are not connected by means of interflow and regional groundwater flow, but only drained by some sort of sheet flow via the routing states. This means that the SM, UZ, and LZ model states are only controlled by the spatial variation of rainfall."

Given that this paper was published over a decade ago, I would like to know whether this still holds true for the latest version of the LISFLOOD model. Specifically, are there now any lateral (horizontal) exchanges (e.g., interflow or groundwater flow) between individual neighboring pixels?

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