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University of Nottingham (2022)

Assessment of groundwater aquifer impact from artificial lagoons and the reuse of wastewater in Qatar.

Aljabiry, Hayat

Titre : Assessment of groundwater aquifer impact from artificial lagoons and the reuse of wastewater in Qatar.

Auteur : Aljabiry, Hayat

Université de soutenance : University of Nottingham

Grade : Doctor of Philosophy (PhD) 2022

Résumé partiel
Qatar is a desert where precipitation is uncommon and occurs mostly in winter. Qatar depends on desalination for drinking water and groundwater and recycled water for irrigation. There is overextraction of groundwater causing seawater intrusion. Re-use of treated wastewater (TWW) is extremely limited with only 14% of TWW being used for irrigation. This has led to the country disposing of unwanted water from various sources in artificial lagoons situated across the country where it evaporates and infiltrates the groundwater raising concerns over the possibility of environmental pollution. This is a unique situation that is limited to extremely arid countries. Research on the artificial lagoons is limited, with a noticeable knowledge gap in understanding the lagoon influence on Qatari aquifers. Accordingly, the hypothesis underpinning this research is that the quality and quantity of water in lagoons is currently having an impact on the groundwater reservoirs in Qatar. To validate this hypothesis a social survey, a hydrogeochemical survey and a microbial survey have been undertaken to establish the current situation and provide policy makers with recommendations for future lagoon management.

A social survey was conducted through the distribution of online questionnaires to the public and conducting semi-structured interviews with policymakers responsible for water management in Qatar. The public had variable knowledge about the lagoons and expressed a willingness to learn more about them. Public and policymakers in Qatar agreed that there were both good and harmful consequences of the lagoons on groundwater and the environment. Policymakers’ views differed, dividing into groups perceiving the lagoons as having the potential to degrade groundwater quality and those suggesting that infiltration of lagoon water would improve groundwater sources. Public opinion is important in lagoon management, thus policymakers agreed to raise awareness and incorporate public views with respect to water management in Qatar. Both public and policymakers encouraged the reuse of TWW and lagoon water and Qatar might leverage this approval to promote and extend its TWW reuse programs.

Mots clés  : Treated wastewater, TWW, Qatari aquifers, Qatar, Artificial lagoons

Présentation

Page publiée le 19 janvier 2023