Drainage: Geotextile membranes can help water drain away and reduce surface water build-up.
Erosion control: They can help prevent erosion.
Weed control: They can prevent weeds from growing and competing with plants for nutrients.
Ground reinforcement: They can help reinforce the ground.
Soil separation: They can separate layers of soil.
Soil stabilization: They can help stabilize the soil.
Barrier protection: They can be used to contain harmful substances, such as at landfills.