A Convolution Method to Assess Subgrid?Scale Interactions Between Flow and Patchy Vegetation in Biogeomorphic Models
نویسندگان
چکیده
Interactions between water flow and patchy vegetation are governing the functioning of many ecosystems. Yet, numerical models that simulate those interactions explicitly at submeter patch scale to predict geomorphological ecological consequences landscape (order km2) still very computationally demanding. Here, we present a novel efficient convolution technique incorporate biogeomorphic feedbacks in across multiple spatial scales (from less than 1 m2 several km2). This new methodology allows for spatially refining coarse-resolution hydrodynamic simulations velocities m) around fine-resolution patterns 10 cm). Although perturbations each grid cell not simulated with same level accuracy as more expensive finer-resolution models, show our approach enables refinement by resolving efficiently subgrid-scale velocity within patches (mean error, variability, correlation improved by, respectively, 13%, 66%, 49% on average test cases). We also provide evidence can substantially improve representation important processes, such effects net sedimentation rate habitable surface area (respectively 66% 39% better average). Finally, estimate replacing model coarser-resolution associated method could reduce computational time real-life fluctuating orders magnitude. marks an step forward toward multiscale modeling.
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ژورنال
عنوان ژورنال: Journal of Advances in Modeling Earth Systems
سال: 2021
ISSN: ['1942-2466']
DOI: https://doi.org/10.1029/2020ms002116