Which statement describes geomembranes?

Which statement describes geomembranes?

• A. They are plastic sheets nearly impermeable to water flow.
• B. They are metal sheets used for soil reinforcement.
• C. They cannot be joined.
• D. They are used for decorative purposes.

Answer: (B)

Geomembranes are plastic sheets designed to block the movement of liquids. Their defining property is being nearly impermeable to water flow, which is why they’re used as liners to contain leachate and prevent groundwater contamination in landfills, ponds, and other containment structures. Because they cover large areas, these sheets are manufactured to be joined along seams to form a continuous barrier, with seam welding or bonding used to keep leaks from developing. They’re not metal sheets used for soil reinforcement, and they aren’t decorative; their purpose is containment and environmental protection. So the description that fits geomembranes highlights their plastic, impermeable nature and their ability to be joined into a continuous barrier.

Geomembranes are plastic sheets designed to block the movement of liquids. Their defining property is being nearly impermeable to water flow, which is why they’re used as liners to contain leachate and prevent groundwater contamination in landfills, ponds, and other containment structures. Because they cover large areas, these sheets are manufactured to be joined along seams to form a continuous barrier, with seam welding or bonding used to keep leaks from developing. They’re not metal sheets used for soil reinforcement, and they aren’t decorative; their purpose is containment and environmental protection. So the description that fits geomembranes highlights their plastic, impermeable nature and their ability to be joined into a continuous barrier.