Changes

*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  

*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  

:''"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>

:''"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>. This practice is also seen in Massachusetts bioretention design documentation<ref>Massachusetts Department of Environmental Protection. . “Bioretention Areas.” 1999. http://prj.geosyntec.com/npsmanual/bioretentionareas.aspx.</ref><ref>Massachusetts Department of Environmental Protection. 2014. “Bioretention Areas & Rain Gardens.” 2014. http://prj.geosyntec.com/npsmanual/bioretentionareasandraingardens.aspx.</ref>

<ref>Willard, L.L., T. Wynn-Thompson, L. H. Krometis, T. P. \ Badgley, and B. D. Neher. 2017. “Does It Pay to Be Mature? Evaluation of Bioretention Cell Performance Seven Years Postconstruction.” Journal of Environmental Engineering 143 (9).</ref>

<ref>Willard, L.L., T. Wynn-Thompson, L. H. Krometis, T. P. \ Badgley, and B. D. Neher. 2017. “Does It Pay to Be Mature? Evaluation of Bioretention Cell Performance Seven Years Postconstruction.” Journal of Environmental Engineering 143 (9).</ref>

==Filter media==

==Filter media==

Salty water has been shown to cause degradation of the filter media, and subsequent loss of the initial texture and flow conditions <ref>Kakuturu, S.P., and S.E. Clark. 2015. Clogging Mechanism of Stormwater Filter Media by NaCl as a Deicing Salt. doi: 10.1089/ees.2014.0337. [https://static1.squarespace.com/static/55c211c8e4b06ea5799e6c03/t/5605b199e4b08dbc6e74a369/1443213721385/Clogging+mechanism+of+stormwater+filter+media.pdf]</ref>

Salty water has been shown to cause degradation of the filter media, and subsequent loss of the initial texture and flow conditions <ref>Kakuturu, S.P., and S.E. Clark. 2015. Clogging Mechanism of Stormwater Filter Media by NaCl as a Deicing Salt. doi: 10.1089/ees.2014.0337. [https://static1.squarespace.com/static/55c211c8e4b06ea5799e6c03/t/5605b199e4b08dbc6e74a369/1443213721385/Clogging+mechanism+of+stormwater+filter+media.pdf]</ref>

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