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Sea water intrusion in the Salalah plain aquifer, Oman
KTH, School of Architecture and the Built Environment (ABE), Land and Water Resources Engineering (moved 20130630).
KTH, School of Architecture and the Built Environment (ABE), Land and Water Resources Engineering (moved 20130630).
2007 (English)In: Journal of Environmental Hydrology, ISSN 1058-3912, Vol. 15, 1-14 p.Article in journal (Refereed) Published
Abstract [en]

Salalah is situated on a fresh water aquifer that is replenished during the annual monsoon season with an average vertical precipitation (rainfall) of 245 mm/yr in Jabal AlQara and 104 mm/yr in the Salalah plain. The aquifer is the only source of water for Salalah city. A rainfall and mist precipitation in the Jabal AlQara recharges theplain with significant renewable fresh groundwater resources that have allowed agricultural and industrial development to occur. In Salalah city where groundwater has been used extensively since the early 1980s for agricultural, industrial and municipal purposes, the groundwater resource has been withdrawn from the aquifer more rapidly than it can be replenished by natural recharge. In turn, the heavy withdrawal of large quantities of the groundwater from the aquifer has lead to intrusion of sea water. Agricultural activities usually utilize over 70% of the groundwater. In order to investigate the salinity intrusion and nitrate pollution, the study area was divided into four strips on the basis of land use plans in the area. Water samples were collected from 18 water wells. Chemical analysis of basic ions and pollution parameters in natural waters was carried out. The electrical conductivity, chloride and nitrate concentrations were highest in the agricultural and residential strips, and Garziz grass farm. The present status of groundwater quality in most of the agricultural and residential strips does not meet drinking water standards. The study suggests an approach to protect the groundwater in the Salalah plain aquifer from further encroachment, by artificial recharge with reclaimed water, preferably along the Salalah coastal agricultural strip. This scheme can also be applied to other regions with similar conditions.

Place, publisher, year, edition, pages
2007. Vol. 15, 1-14 p.
Keyword [en]
aquifer, chemical analysis, chloride, electrical conductivity, freshwater environment, groundwater pollution, land use planning, nitrate, precipitation (climatology), saline intrusion, seawater, water pollution
National Category
Oceanography, Hydrology, Water Resources
URN: urn:nbn:se:kth:diva-155587ScopusID: 2-s2.0-34548704290OAI: diva2:761732

QC 20141107

Available from: 2014-11-07 Created: 2014-11-07 Last updated: 2014-11-07Bibliographically approved

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