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UID:pretalx-flowpath-2025-TUPZ3H@talks.staging.osgeo.org
DTSTART;TZID=CET:20250612T141000
DTEND;TZID=CET:20250612T142000
DESCRIPTION:Managed aquifer recharge (MAR) using treated effluent and storm
 water (TES) as source water is a vital strategy for sustaining urban aquif
 ers used for potable water supply in water-scarce regions. However\, conce
 rns exist about the adverse impacts on groundwater quality due to the intr
 oduction of emerging contaminants (ECs) typically present in TES. This stu
 dy aims to assess the impact of MAR on groundwater quality in the Atlantis
  Aquifer by investigating the occurrence and spatial distribution of ECs\,
  including pharmaceuticals\, pesticides\, and industrial chemicals. Twenty
  samples from MAR source water\, groundwater\, and surface water were coll
 ected and analysed for 289 ECs. Preliminary results showed the detection o
 f 120 compounds\, with MAR source water having the highest number of detec
 tions\, followed by MAR-impacted groundwater\, while naturally recharged g
 roundwater had the fewest. This pattern suggests that ECs are introduced i
 nto the aquifer through MAR\, that some ECs may be attenuated\, and that t
 here is a baseline level of contamination in naturally recharged groundwat
 er. Further analysis involving a three-tiered health risk assessment revea
 led that fewer than 10% of detected compounds pose potential health   risk
 s (RQ >1). To assess the aquifer’s capacity to naturally attenuate (via 
 biodegradation) ECs that pose potential health risks\, conventional water 
 quality indicators (e.g.\, nitrate\, dissolved oxygen\, manganese\, sulpha
 te) collected between 2018 and 2024 will be analysed. The findings will co
 ntribute to the development of an EC monitoring framework for the Atlantis
  Aquifer\, and by integrating EC monitoring into existing management pract
 ices\, this will enhance protection of both the resource and communities t
 hat depend on it.
DTSTAMP:20260428T165439Z
LOCATION:Room R3
SUMMARY:Evaluating Emerging Contaminants in the Atlantis Aquifer’s Manage
 d Aquifer Recharge Scheme\, South Africa - Maposholi Mokhethi\, Reynold Ch
 ow
URL:https://talks.staging.osgeo.org/flowpath-2025/talk/TUPZ3H/
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