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| Type: | Resource | |
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| Created: | Feb 08, 2023 at 8:33 p.m. | |
| Last updated: | Feb 08, 2023 at 8:34 p.m. | |
| Citation: | See how to cite this resource |
| Sharing Status: | Public |
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Abstract
Transient numerical simulations of the Glacial Lake Agassiz Peatland near the Red Lakes in Northern Minnesota were constructed to evaluate observed reversals in vertical ground-water flow. Seasonal weather changes were introduced to a ground-water flow model by varying evapotranspiration and recharge over time. Vertical hydraulic reversals, driven by changes in recharge and evapotranspiration were produced in the simulated peat layer. These simulations indicate that the high specific storage associated with the peat is an important control on hydraulic reversals. Seasonally driven vertical flow is on the order of centimeters in the deep peat, suggesting that seasonal vertical advective fluxes are not significant and that ground-water flow into the deep peat likely occurs on decadal or longer time scales. Particles tracked within the ground-water flow model oscillate over time, suggesting that seasonal flow reversals will enhance vertical mixing in the peat column. The amplitude of flow path oscillations increased with increasing peat storativity, with amplitudes of about 5 cm occurring when peat specific storativity was set to about 0.05 m(-1). (c) 2005 Elsevier B.V. All rights reserved.
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Additional Metadata
| Name | Value |
|---|---|
| DOI | 10.1016/j.jhydrol.2005.05.005 |
| Depth | |
| Scale | 101 - 1 000 km² |
| Layers | 10 |
| Purpose | Scientific investigation (not related to applied problem) |
| GroMoPo_ID | 417 |
| IsVerified | True |
| Model Code | MODFLOW |
| Model Link | https://doi.org/10.1016/j.jhydrol.2005.05.005 |
| Model Time | |
| Model Year | 2006 |
| Model Authors | Reeve, AS; Evensen, R; Glaser, PH; Siegel, DI; Rosenberry, D |
| Model Country | United States |
| Data Available | Report/paper only |
| Developer Email | asreeve@maine.edu |
| Dominant Geology | Unconsolidated sediments |
| Developer Country | USA |
| Publication Title | Flow path oscillations in transient ground-water simulations of large peatland systems |
| Original Developer | No |
| Additional Information | MODFLOW model of wetlands in Minnesota, USA to better understand periodic reversals of hydrologic gradient. |
| Integration or Coupling | None of the above |
| Evaluation or Calibration | Static water levels |
| Geologic Data Availability | No |
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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