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| Type: | Resource | |
| Storage: | The size of this resource is 3.5 MB | |
| Created: | May 22, 2023 at 6:59 p.m. | |
| Last updated: | May 22, 2023 at 8:55 p.m. | |
| DOI: | 10.4211/hs.135b355a2aec44c49308b463eee5decc | |
| Citation: | See how to cite this resource |
| Sharing Status: | Published |
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| Views: | 296 |
| Downloads: | 1 |
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Abstract
Groundwater mixing dynamics play a crucial role in the biogeochemical cycling of shallow wetlands. In this paper, we conducted groundwater simulations to investigate the combined effects of evaporation and local heterogeneity on mixing dynamics in shallow wetland sediments. The results show that evaporation causes groundwater and solutes to upwell from deep sediments to the surface. As the solute reaches the surface, evaporation enhances the accumulation of the solute near the surface, resulting in a higher solute concentration than in deep sediments. Mapping of flow topology reveals that local heterogeneity generates spatially varied mixing patterns mainly along preferential flow pathways. The upwelling of groundwater induced by surface evaporation through heterogeneous sediments is likely to create distinct mixing hotspots that differ spatially from those generated by lateral preferential flows driven by large-scale hydraulic gradients, which enhances the overall mixing in the subsurface. These findings have strong implications for biogeochemical processing in wetlands.
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Funding Agencies
This resource was created using funding from the following sources:
| Agency Name | Award Title | Award Number |
|---|---|---|
| National Science Foundation | Collaborative Research: Impact of evaporation and waves on groundwater dynamics in tidally influenced beaches | 2130595 |
How to Cite
This resource is shared under the Creative Commons Attribution CC BY.
http://creativecommons.org/licenses/by/4.0/
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