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| Type: | Resource | |
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| Created: | Apr 13, 2023 at 2:43 p.m. | |
| Last updated: | Apr 13, 2023 at 2:43 p.m. | |
| Citation: | See how to cite this resource |
| Sharing Status: | Public |
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| Views: | 701 |
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Abstract
A three-dimensional variable-density finite element model was developed to quantify the impact of groundwater over use on submarine groundwater discharge (SGD). The model was applied to the Arani-Korttalaiyar river basin, north of Chennai, India. This region has an upper unconfined and lower semi-confined aquifer extending up to 30 km inland from the coast and beyond this distance; the two aquifers merge and become a single unconfined aquifer. The model simulated that during the period from 2000 to 2012, the flux of seawater to the aquifer has increased from 17,000 to 24,500 m(3)/day due to over-exploitation of groundwater from the semi-confined aquifer. Where as in the unconfined aquifer, SGD has been taking place. Scenarios showing the impact of newly constructed managed aquifer recharge structures, 10% additional increase in rainfall recharge, and termination of pumping from five well-fields on the groundwater conditions in the area were studied. The model predicted a SGD of 85,243 m(3)/day from the unconfined aquifer and 22,414 m(3)/day from the semi-confined aquifer by the end of 2030. By adopting managed aquifer recharge methods, seawater intrusion (rate of 4,408 m(3)/day) can be reduced and SGD (rate of 22,414 m(3)/day) increased. The rate of SGD increase and the movement of seawater to aquifer can be completely prevented in the semi-confined aquifer by adopting these management options by 2030. Findings from this study have enhanced the understanding of SGD and water budget, which can be used by decision-makers for the sustainable management of groundwater resources in coastal aquifers.
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Additional Metadata
| Name | Value |
|---|---|
| DOI | 10.1007/s11356-021-15219-0 |
| Depth | N/A |
| Scale | 1 001 - 10 000 km² |
| Layers | 9 |
| Purpose | Groundwater resources, Salt water intrusion |
| GroMoPo_ID | 2044 |
| IsVerified | True |
| Model Code | Feflow |
| Model Link | https://doi.org/10.1007/s11356-021-15219-0 |
| Model Time | 1996-2003 |
| Model Year | 2021 |
| Creator Email | kcompare@fsu.edu |
| Model Country | India |
| Data Available | Report/paper only |
| Developer Email | elango34@hotmail.com |
| Dominant Geology | Model focuses on multiple geologic materials |
| Developer Country | India; Germany |
| Publication Title | Finite element modelling to assess the submarine groundwater discharge in an over exploited multilayered coastal aquifer |
| Original Developer | No |
| Additional Information | N/A |
| Integration or Coupling | None of the above |
| Evaluation or Calibration | Static water levels |
| Geologic Data Availability | N/A |
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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