Changes

*In Finland the use of a choker course has been advocated for in place of filter fabric as replacing a clogged fabric layer would disturb established [[planting]]<ref>Tahvonen, O. 2018. Adapting Bioretention Construction Details to Local Practices in Finland. Sustainability 10(276). doi: doi:10.3390/su10020276.</ref>.  

*In Finland the use of a choker course has been advocated for in place of filter fabric as replacing a clogged fabric layer would disturb established [[planting]]<ref>Tahvonen, O. 2018. Adapting Bioretention Construction Details to Local Practices in Finland. Sustainability 10(276). doi: doi:10.3390/su10020276.</ref>.  

*Another recently revised document in Oklahoma suggests that geotextiles have a place in the base of the reservoir, but a choker course is best employed between layers inside the practice<ref>McLemore, A.J., J.R. Vogel, and S. Taghvaeian. 2017. “Bioretention Cell Design Guidance for Oklahoma.” http://pods.dasnr.okstate.edu/docushare/dsweb/Get/Document-10743/BAE-1536web.pdf.</ref>

*Another recently revised document in Oklahoma suggests that geotextiles have a place in the base of the reservoir, but a choker course is best employed between layers inside the practice<ref>McLemore, A.J., J.R. Vogel, and S. Taghvaeian. 2017. “Bioretention Cell Design Guidance for Oklahoma.” http://pods.dasnr.okstate.edu/docushare/dsweb/Get/Document-10743/BAE-1536web.pdf.</ref>

*In Australia geotextile is only recommended around the sides of the practice ''“Geotextile fabrics are not recommended for use between layers in bioretention systems due to the risk of clogging.”'' and ''"“Conventional bioretention systems have... ...a permeable geotextile liner around their sides (no liner along the base)"'' <ref>Water by Design. 2014. Bioretention Technical Design Guidelines (Version 1.1). http://hlw.org.au/u/lib/mob/20150715140823_de4e60ebc5526e263/wbd_2014_bioretentiontdg_mq_online.pdf.</ref>

*In Australia geotextile is only recommended around the sides of the practice  

:''“Geotextile fabrics are not recommended for use between layers in bioretention systems due to the risk of clogging.”'', and  

:''"“Conventional bioretention systems have... ...a permeable geotextile liner around their sides (no liner along the base)"'' <ref>Water by Design. 2014. Bioretention Technical Design Guidelines (Version 1.1). http://hlw.org.au/u/lib/mob/20150715140823_de4e60ebc5526e263/wbd_2014_bioretentiontdg_mq_online.pdf.</ref>