“…However, one of the other functions of the geotextile, well-documented by Coupe et al, 2003;Newman et al, 2013, is that it acts as an in-situ bioreactor for the breakdown of contaminants carried in stormwater from the surface layers. This is carried out by trapping particulate-associated pollutants and also biodegradation of hydrocarbons facilitated by a biofilm, a microecosystem of microorganisms such as bacteria, fungi and protists, growing on the geotextile.…”