Advertisement

Changes in Groundwater Salinity and Nitrate Concentrations Due to Aquifer Recharge by Treated Wastewater: Korba Case Study

  • Foued El Ayni
  • Semia Cherif
  • Amel Jrad
  • Malika Trabelsi-Ayadi
Conference paper
Part of the NATO Science for Peace and Security Series C: Environmental Security book series (NAPSC)

Abstract

The overexploitation of Korba aquifer mainly for irrigation purposes at a rate of 103 % caused a decrease in aquifer level in addition to its deteriorating water quality. Since July 2008, treated wastewater from Korba plant has been used to artificially recharge the aquifer at a site close to the treated wastewater plant. The purpose of this project is to develop a new sustainable water resource, to improve the groundwater bad quality and raise the piezometry of the coastal groundwater in this region.

Before starting the recharge, both groundwater and treated wastewater were monitored for their quality. The resulting mixture of groundwater and infiltrated treated wastewater is monitored since then. The changes in water quality before and after 3 years of recharge are followed for two significant parameters throughout the whole study zone: salinity and nitrates concentration, in an area of about 9 km2 including both the recharge site and the treatment plant. There is no clear difference introduced by the recharge on nitrates very high concentrations as 90 % of the studied waters contain more than 50 mg L−1 NO3 unchanged and classified as bad or very bad quality waters. For salinity there is a slight decrease especially around the recharge area. In the light of these results, this ambitious project already shows positive effects for water and environmental management in the region.

Keywords

Chemical Oxygen Demand Nitrate Concentration Groundwater Quality Biochemical Oxygen Demand Seawater Intrusion 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

References

  1. 1.
    Ben Alaya A, Chkirbene A, Jallali S, Harbaoui K, Tarhouni J (2009) Evaluation de la qualité des eaux de la nappe de la côte orientale du Cap-Bon en Tunisie. AGDUMED, 14–16 mai 2009, Rabat, Maroc, pp 111–119Google Scholar
  2. 2.
    Cazurra T (2008) Water reuse of south Barcelona’s wastewater reclamation plant. Desalination 218(1–3):43–51CrossRefGoogle Scholar
  3. 3.
    El Ayni F, Cherif S, Jrad A, Trabelsi-Ayadi M (2011) Impact of treated wastewater reuse on agriculture and aquifer recharge in a coastal area: Korba case study. Water Res Manag 25(9):2251–2265CrossRefGoogle Scholar
  4. 4.
    Gaaloul N, Cheng AHD (2003) Hydrogeological and hydrochemical investigation of coastal aquifers in Tunisia-Crisis in overexploitation and salinization. In: Second international conference on saltwater intrusion and coastal aquifers-monitoring, modeling and management, Merida, Mexico, March 30–April 2Google Scholar
  5. 5.
    Haruvy N, Offer R, Hadas A, Ravina I (1999) Wastewater irrigation- economic concerns regarding beneficiary and hazardous effects of nutrients. Water Res Manag 13(5):303–314CrossRefGoogle Scholar
  6. 6.
    Idelovitch E (1978) Waste water re-use by biological-chemical treatment and groundwater recharge. Water Pollut Control Fed 50(12):2723–2740Google Scholar
  7. 7.
    Kouzana L, Ben Mammou A, Sfar Felfoul M (2009) Seawater intrusion and associated processes: case of the Korba aquifer (Cap-Bon, Tunisia). Comptes Rendus Geosci 341(1):21–35CrossRefGoogle Scholar
  8. 8.
    Paniconi C, Khlaifi I, Lecca G, Giacomelli A, Tarhouni J (2001) A modelling study of seawater intrusion in Korba coastal plain, Tunisia. Phys Chem Earth 26(4):345–351CrossRefGoogle Scholar
  9. 9.
    Sheng Z (2005) An aquifer storage and recovery system with reclaimed wastewater to preserve native groundwater resources in El Paso, Texas. J Environ Manage 75(4):367–377CrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media Dordrecht 2013

Authors and Affiliations

  • Foued El Ayni
    • 1
    • 2
  • Semia Cherif
    • 3
  • Amel Jrad
    • 1
  • Malika Trabelsi-Ayadi
    • 2
  1. 1.Centre International des Technologies de l’Environnement de TunisTunisTunisia
  2. 2.Laboratoire d’application de la chimie aux ressources et substances naturelles et à l’environnementBizerteTunisia
  3. 3.National Research Center in Material SciencesSolimanTunisia

Personalised recommendations