Management options for a multipurpose coastal aquifer in Oman

Ali Al-Maktoumi, Mustafa El-Rawy, Slim Zekri

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Using MODFLOW 2005, this study numerically evaluated the effects of managed aquifer recharge (MAR) using treated wastewater (TWW) in managing the Al-Khawd coastal aquifer northeast of Oman. Our primary objective is to increase the urban water supply and to sustain the aquifer service with the lowest possible damage to the aquifer. A number of managerial scenarios were simulated and progressively developed to reduce seawater intrusion and outflow of the groundwater to the sea. An economic analysis was conducted to characterize the trade-off between the benefits of MAR and seawater inflow to the aquifer under increased abstraction for domestic supply. The results show that by managing irrigation wells and relocating public wells in conjunction with MAR practices, the abstracted volume for drinking purposes could be doubled. Even though injection of TWW is more expensive (due to the injection cost), it was observed to result in greater benefits. The results indicate that managing the aquifer would produce a net benefit ranging from $8.22 million (scenario 7) to $15.21 million (scenario 4) compared to $1.57 million with the current practice. In conclusion, MAR using TWW is a feasible solution to develop water resources in arid regions, and the best scenario depends on the decision maker’s preference when weighing the benefits of MAR and the level of damage to the aquifer. MAR could help manage stressed aquifer systems in arid zones to maximize the benefit of using the water for domestic purposes while minimizing the damage to the aquifer.

Original languageEnglish
Article number636
JournalArabian Journal of Geosciences
Volume9
Issue number14
DOIs
Publication statusPublished - Sep 1 2016

Fingerprint

coastal aquifer
aquifer
recharge
wastewater
damage
seawater
well
economic analysis
drinking
arid region
trade-off
inflow
outflow

Keywords

  • Arid zone
  • Groundwater simulation
  • Managed aquifer recharge
  • Reuse of treated wastewater
  • Seawater intrusion

ASJC Scopus subject areas

  • Environmental Science(all)
  • Earth and Planetary Sciences(all)

Cite this

Management options for a multipurpose coastal aquifer in Oman. / Al-Maktoumi, Ali; El-Rawy, Mustafa; Zekri, Slim.

In: Arabian Journal of Geosciences, Vol. 9, No. 14, 636, 01.09.2016.

Research output: Contribution to journalArticle

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