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| Created: | Feb 07, 2023 at 6:13 p.m. | |
| Last updated: | Feb 07, 2023 at 6:14 p.m. | |
| Citation: | See how to cite this resource |
| Sharing Status: | Public |
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| Views: | 271 |
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Abstract
During the 1990s, groundwater overexploitation has resulted in seawater intrusion in the coastal aquifer of the Shenzhen city, China. Although water supply facilities have been improved and alleviated seawater intrusion in recent years, groundwater overexploitation is still of great concern in some local areas. In this work we present a three-dimensional density-dependent numerical model developed with the FEFLOW code, which is aimed at simulating the extent of seawater intrusion while including tidal effects and different groundwater pumping scenarios. Model calibration, using waterheads and reported chloride concentration, has been performed based on the data from 14 boreholes, which were monitored from May 2008 to December 2009. A fairly good fitness between the observed and computed values was obtained by a manual trial-and-error method. Model prediction has been carried out forward 3 years with the calibrated model taking into account high, medium and low tide levels and different groundwater exploitation schemes. The model results show that tide-induced seawater intrusion significantly affects the groundwater levels and concentrations near the estuarine of the Dasha river, which implies that an important hydraulic connection exists between this river and groundwater, even considering that some anti-seepage measures were taken in the river bed. Two pumping scenarios were considered in the calibrated model in order to predict the future changes in the water levels and chloride concentration. The numerical results reveal a decreased tendency of seawater intrusion if groundwater exploitation does not reach an upper bound of about 1.32 x 10(4) m(3)/d. The model results provide also insights for controlling seawater intrusion in such coastal aquifer systems.
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Additional Metadata
| Name | Value |
|---|---|
| DOI | 10.1007/s12040-013-0273-3 |
| Depth | 30 |
| Scale | < 100 km² |
| Layers | 2-5 layers |
| Purpose | groundwater resources;salt water intrusion |
| GroMoPo_ID | 66 |
| IsVerified | True |
| Model Code | Feflow |
| Model Link | https://doi.org/10.1007/s12040-013-0273-3 |
| Model Time | 2008-2009 |
| Model Year | 2013 |
| Model Authors | Wei Lu, Qingchun Yang, Jordi D Martin, Ricardo Juncosa |
| Model Country | China |
| Data Available | report/paper only;Geological input available;Cross-section provided in the paper |
| Developer Email | qyang@udc.es |
| Dominant Geology | unconsolidated |
| Developer Country | China |
| Publication Title | Numerical modelling of seawater intrusion in Shenzhen (China) using a 3D density-dependent model including tidal effects |
| Original Developer | No |
| Additional Information | |
| Integration or Coupling | Solute transport |
| Evaluation or Calibration | dynamic water levels;contaminant concentrations |
| Geologic Data Availability |
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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