To enhance slope stability, we need to understand the essence of geotextile. The application of geotextiles has proven to be useful in bioengineering. This is usually done to enhance and maintain the state of such biosystems. Specific types of cover crops could be used to control erosion, enhance soil fertility and protect soil nutrients. But without the presence of the appropriate geotextile, unforeseen geological hazards such as landslides, slope failures, debris flows and rockslides can occur, washing the preserved nutrients and destroying biodiversity. Several geotextile materials have been proposed and used in bioengineering, but there is still an unanswered question, as to which of the materials is appropriate for a given site.
Nsiah (2012), mimicked the BORASSUS project and used elephant grass as a biological geotextile material to stabilize slopes. The questions about his project are, why elephant grass? Was elephant grass the appropriate material to be used, given the site conditions? Can the results be improved if another material is used? Or was that the cheapest material available? This research seeks to find answers to these questions by undertaking a slope stability project using different possible geotextile materials. The ability of the materials used, to control erosion, stabilize slope and promote biodiversity will be determined statistically. This will help bring to light the appropriate geotextile material for a given site.