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| Created: | Feb 08, 2023 at 8:40 p.m. | |
| Last updated: | Feb 08, 2023 at 8:41 p.m. | |
| Citation: | See how to cite this resource |
| Sharing Status: | Public |
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Abstract
The solute transport in a tropical, coastal aquifer of southern India is numerically simulated considering the possible cases of aquifer recharge, freshwater draft, and seawater intrusion using numerical modeling software. The aquifer considered for the study is a shallow, unconfined aquifer with lateritic formations having good monsoon rains up to about 3,000mm during June to September and the rest of the months almost dry. The model is calibrated for a two-year period and validated against the available dataset, which gave satisfactory results. The groundwater flow pattern during the calibration period shows that for the month of May a depleted water table and during the monsoon month of August a saturated water table was predicted. The sensitivity analysis of model parameters reveals that the hydraulic conductivity and recharge rate are the most sensitive parameters. Based on seasonal investigation, the seawater intrusion is found to be more sensitive to pumping and recharge rates compared to the aquifer properties. The water balance study confirms that river seepage and rainfall recharge are the major input to the aquifer. The model is used to forecast the landward movement of seawater intrusion because of the anticipated increase in freshwater draft scenarios in combination with the decreased recharge rate over a longer period. The results of the predictive simulations indicate that seawater intrusion may still confine up to a distance of approximately 450-940m landward for the scenarios considered and thus are sustainable. (C) 2015 American Society of Civil Engineers.
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Additional Metadata
| Name | Value |
|---|---|
| DOI | 10.1061/(ASCE)EE.1943-7870.0001037 |
| Depth | |
| Scale | 11 - 101 km² |
| Layers | 3 |
| Purpose | Groundwater resources;Climate change |
| GroMoPo_ID | 422 |
| IsVerified | True |
| Model Code | Feflow;Regional Climate Model |
| Model Link | https://doi.org/10.1061/(ASCE)EE.1943-7870.0001037 |
| Model Time | 1998-2007 |
| Model Year | 2016 |
| Model Authors | Lathashri, UA; Mahesha, A |
| Model Country | India |
| Data Available | Report/paper only |
| Developer Email | ua.latha@gmail.com; amaimahesha@gmail.com |
| Dominant Geology | Unconsolidated sediments |
| Developer Country | India |
| Publication Title | Predictive Simulation of Seawater Intrusion in a Tropical Coastal Aquifer |
| Original Developer | No |
| Additional Information | Downscaling a Regional Climate Model and coupling with FEFLOW to assess climate change and urban development impacts on a coastal aquifer near Chennai, India |
| Integration or Coupling | None of the above |
| Evaluation or Calibration | Dynamic 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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