A geomembrane is a synthetic membrane used as a barrier to control fluid or gas movement in various applications. Made from materials like polyethylene or polyvinyl chloride, geomembranes are commonly used in landfills, ponds, and mining operations to prevent contamination of soil and groundwater. These membranes are designed to be durable and resistant to environmental factors, such as UV radiation and chemical exposure. Their installation helps manage waste, protect natural resources, and support sustainable practices in construction and environmental management.