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2. Comparative analysis of the outflow water quality of two sustainable linear drainage systems
3. Anon(2014)Permavoid System: Passive Capillary Irrigation Permavoid System Technical BulletinIssue No: 5. Available from :http://www.polypipe.com/cms/toolbox/PCL_14_224_Permavoid_Technical_Bulletin_Issue_5a_V2.pdf
4. Anon(2015)Permavoid in the Urban Environment – Urban Streetscapes. Available from: Permavoid System Technical Bulletin Issue No: 6 May‐2015 p1http://www.polypipe.com/cms/toolbox/PCL_15_293_Permavoid_Technical_Bulletin_Issue_6_V2_LR.pdf
5. Azevedo M.andZornberg J.G.(2013)Capillary barrier dissipation by new wicking geotextile Advances in Unsaturated Soils – Proc. 1st Pan‐American Conference on Unsaturated Soils organised in Cartagena de Indias Colombia February 2013. pp559–566 CaicedoB MurilloC HoyosL. EstebanColmenares J. RafaelBerdugo I.(eds) CRC/Taylor & Francis Group London ISBN 978‐0‐415‐62095‐6.