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Assessing Aquifer Water Level and Salinity for a Managed Artificial Recharge Site Using Reclaimed Water

Centre of Water Research and Technologies, Geo-resources Laboratory, Techno-park Borj-Cedria, BP 273 Soliman, Tunisia
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Water 2020, 12(2), 341; https://doi.org/10.3390/w12020341
Received: 11 December 2019 / Revised: 13 January 2020 / Accepted: 20 January 2020 / Published: 25 January 2020
This study was carried out to examine the impact of an artificial recharge site on groundwater level and salinity using treated domestic wastewater for the Korba aquifer (north eastern Tunisia). The site is located in a semi-arid region affected by seawater intrusion, inducing an increase in groundwater salinity. Investigation of the subsurface enabled the identification of suitable areas for aquifer recharge mainly composed of sand formations. Groundwater flow and solute transport models (MODFLOW and MT3DMS) were then setup and calibrated for steady and transient states from 1971 to 2005 and used to assess the impact of the artificial recharge site. Results showed that artificial recharge, with a rate of 1500 m3/day and a salinity of 3.3 g/L, could produce a recovery in groundwater level by up to 2.7 m and a reduction in groundwater salinity by as much as 5.7 g/L over an extended simulation period. Groundwater monitoring for 2007–2014, used for model validation, allowed one to confirm that the effective recharge, reaching the water table, is less than the planned values. View Full-Text
Keywords: artificial recharge; groundwater; treated wastewater artificial recharge; groundwater; treated wastewater
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Jarraya Horriche, F.; Benabdallah, S. Assessing Aquifer Water Level and Salinity for a Managed Artificial Recharge Site Using Reclaimed Water. Water 2020, 12, 341.

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