Geotextiles are used for drainage to either convey or allow water penetration and to prevent the mixing of two different materials; geomembranes are used to contain liquids in ponds or wastes in landfills; geogrids and geocells are used for load support and to increase the bearing capacity of weak soils; and geocells as well as a variety of turf reinforcement mats (TRM) and erosion control blankets (ECB) are used for slope and channel protection and erosion control.