Articles | Volume 29, issue 18
https://doi.org/10.5194/hess-29-4491-2025
https://doi.org/10.5194/hess-29-4491-2025
Research article
 | 
19 Sep 2025
Research article |  | 19 Sep 2025

The influence of lateral flow on land surface fluxes in southeast Australia varies with model resolution

Anjana Devanand, Jason P. Evans, Andy J. Pitman, Sujan Pal, David Gochis, and Kevin Sampson

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Cited articles

Alexander, G. A., Voter, C. B., Wright, D. B., and Loheide II, S. P.: Urban Ecohydrology: Accounting for Sub-Grid Lateral Water and Energy Transfers in a Land Surface Model, Water Resour. Res., 60, e2023WR035511, https://doi.org/10.1029/2023WR035511, 2024. 
Arnault, J., Fersch, B., Rummler, T., Zhang, Z., Quenum, G. M., Wei, J., Graf, M., Laux, P., and Kunstmann, H.: Lateral terrestrial water flow contribution to summer precipitation at continental scale – A comparison between Europe and West Africa with WRF-Hydro-tag ensembles, Hydrol. Process., 35, e14183, https://doi.org/10.1002/hyp.14183, 2021. 
Barlage, M., Tewari, M., Chen, F., Miguez-Macho, G., Yang, Z.-L., and Niu, G.-Y.: The effect of groundwater interaction in North American regional climate simulations with WRF/Noah-MP, Climatic Change, 129, 485–498, https://doi.org/10.1007/s10584-014-1308-8, 2015. 
Bhanja, S. N., Coon, E. T., Lu, D., and Painter, S. L.: Evaluation of distributed process-based hydrologic model performance using only a priori information to define model inputs, J. Hydrol., 618, 129176, https://doi.org/10.1016/j.jhydrol.2023.129176, 2023. 
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Short summary
Including lateral flow increases evapotranspiration near major river channels in high-resolution land surface simulations in southeast Australia, consistent with observations. The 1-km resolution model shows a widespread pattern of dry ridges that does not exist at coarser resolutions. Our results have implications for improved simulations of droughts and future water availability.
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