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Author (up) Attard, G.; Rossier, Y.; Eisenlohr, L. openurl 
  Title Urban groundwater age modeling under unconfined condition – Impact of underground structures on groundwater age: Evidence of a piston effect Type Journal Article
  Year 2016 Publication Journal Of Hydrology Abbreviated Journal  
  Volume 535 Issue Pages 652-661  
  Keywords  
  Abstract In this paper, underground structures are shown to have a major influence on the groundwater mean age distribution described as a dispersive piston effect. Urban underground development does not occur without impacts on subsoil resources. In particular, groundwater resources can be vulnerable and generate disturbances when this space is exploited. Groundwater age spatial distribution data are fundamental for resource management as it can provide operational sustainability indicators. However, the application of groundwater age modeling is neglected regarding the potential effect of underground structures in urban areas. A three dimensional modeling approach was conducted to quantify the impact of two underground structures: (1) an impervious structure and (2) a draining structure. Both structures are shown to cause significant mixing processes occurring between shallow and deeper aquifers. The design technique used for draining structures is shown to have the greatest impact, generating a decrease in mean age of more than 80% under the structure. Groundwater age modeling is shown to be relevant for highlighting the role played by underground structures in advective-dispersive flows in urban areas. (C) 2016 Elsevier B.V. All rights reserved.  
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  Series Volume Series Issue Edition  
  ISSN 0022-1694 ISBN Medium  
  Area Expedition Conference  
  Notes WOS:000373421500053 HYDRIMZ Approved no  
  Call Number IGE @ juliette.blanchet @ Serial 4119  
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