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| Created: | Feb 08, 2023 at 4:31 p.m. | |
| Last updated: | Feb 08, 2023 at 4:31 p.m. | |
| Citation: | See how to cite this resource |
| Sharing Status: | Public |
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Abstract
A conduit flow process (CFP) for the Modular Finite Difference Ground-Water Flow model, MODFLOW-2005, has been created by the U. S. Geological Survey. An application of the CFP on a carbonate aquifer in southern Florida is described; this application examines (1) the potential for turbulent groundwater flow and (2) the effects of turbulent flow on hydraulic heads and parameter sensitivities. Turbulent flow components were spatially extensive in preferential groundwater flow layers, with horizontal hydraulic conductivities of about 5,000,000 m d(-1), mean void diameters equal to about 3.5 cm, groundwater temperature equal to about 25 degrees C, and critical Reynolds numbers less than or equal to 400. Turbulence either increased or decreased simulated heads from their laminar elevations. Specifically, head differences from laminar elevations ranged from about -18 to +27 cm and were explained by the magnitude of net flow to the finite difference model cell. Turbulence also affected the sensitivities of model parameters. Specifically, the composite-scaled sensitivities of horizontal hydraulic conductivities decreased by as much as 70% when turbulence was essentially removed. These hydraulic head and sensitivity differences due to turbulent groundwater flow highlight potential errors in models based on the equivalent porous media assumption, which assumes laminar flow in uniformly distributed void spaces.
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Spatial
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Additional Metadata
| Name | Value |
|---|---|
| DOI | 10.1029/2007WR006601 |
| Depth | |
| Scale | 101 - 1 000 km² |
| Layers | 9 |
| Purpose | Groundwater resources;Scientific investigation (not related to applied problem) |
| GroMoPo_ID | 355 |
| IsVerified | True |
| Model Code | MODFLOW |
| Model Link | https://doi.org/10.1029/2007WR006601 |
| Model Time | SS |
| Model Year | 2008 |
| Model Authors | Shoemaker, WB; Cunningham, KJ; Kuniansky, EL; Dixon, J |
| Model Country | United States |
| Data Available | Report/paper only |
| Developer Email | Bshoemak@usgs.gov |
| Dominant Geology | Carbonate (including karst) |
| Developer Country | USA |
| Publication Title | Effects of turbulence on hydraulic heads and parameter sensitivities in preferential groundwater flow layers |
| Original Developer | No |
| Additional Information | MODFLOW-CFP model of the Biscayne aquifer in Florida, USA to model turbulent groundwater flow. |
| 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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