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| Created: | Feb 08, 2023 at 7:48 p.m. | |
| Last updated: | Feb 08, 2023 at 7:49 p.m. | |
| Citation: | See how to cite this resource |
| Sharing Status: | Public |
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| Views: | 542 |
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Abstract
Open drainage ditches located in low permeability material can interact with an underlying aquifer, especially if the drains almost or totally penetrate through to the aquifer. This interaction can be represented by drain coefficients incorporated in regional groundwater models. The drain coefficients depend on both the vertical distance from the base of the drain to the aquifer and the hydraulic conductivities of the low permeability deposits and the underlying aquifer. In a case study of drained marshes in the Thurne catchment in Norfolk, UK, drains with a water level below ordnance datum (OD) draw in saline water from the coast and freshwater from recharge areas. Pathlines, derived from a regional groundwater model analysis, explain the salinities measured in drains. In addition a series of vertical section numerical model solutions are used to develop general guidance on the selection of drain coefficients.
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Additional Metadata
| Name | Value |
|---|---|
| DOI | 10.1111/j.1747-6593.2009.00195.x |
| Depth | |
| Scale | 101 - 1 000 km² |
| Layers | 3 |
| Purpose | Salt water intrusion |
| GroMoPo_ID | 385 |
| IsVerified | True |
| Model Code | MODFLOW |
| Model Link | https://doi.org/10.1111/j.1747-6593.2009.00195.x |
| Model Time | |
| Model Year | 2011 |
| Model Authors | Simpson, T; Holman, IP; Rushton, K |
| Model Country | United Kingdom |
| Data Available | Report/paper only |
| Developer Email | kenrrushton@btinternet.com |
| Dominant Geology | Model focuses on multiple geologic materials |
| Developer Country | England |
| Publication Title | Drainage ditch-aquifer interaction with special reference to surface water salinity in the Thurne catchment, Norfolk, UK |
| Original Developer | No |
| Additional Information | |
| Integration or Coupling | Surface water |
| Evaluation or Calibration | Unsure |
| 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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