Geomembranes are used in urban and industrial areas to manage and control stormwater runoff by acting as a barrier between the stormwater and the underlying soil or water bodies. These impermeable membranes are installed in various structures such as detention ponds, retention basins, and stormwater ponds to prevent infiltration and leakage. By effectively containing stormwater, geomembranes help to reduce the risk of flooding, erosion, and water pollution, improving overall water quality and protecting surrounding ecosystems.

Geomembranes and geotextiles are both materials used in geotechnical engineering, but they serve different purposes. Geomembranes are thin, impermeable sheets made of materials like HDPE or PVC and are primarily used to prevent the migration of liquids or gases. They are often used in applications like lining landfills or creating containment barriers for hazardous materials. On the other hand, geotextiles are permeable fabrics made of synthetic or natural fibers and are used to enhance the performance of soils or other geotechnical materials. They provide filtration, separation, or reinforcement functions and are commonly used in applications like erosion control, soil stabilization, or drainage systems. Therefore, the main difference lies in their functionality, with geomembranes providing a barrier and geotextiles offering filtration and reinforcement.

When installing geomembranes in earthquake-prone areas, there are several considerations that need to be taken into account. Firstly, it is important to select a geomembrane material that is flexible and can withstand the dynamic movements caused by earthquakes. The geomembrane should have high tensile strength and elongation properties to prevent tearing or rupturing during seismic events. Secondly, the installation technique should be carefully planned to ensure proper anchoring and secure attachment of the geomembrane. This may involve using additional reinforcement materials, such as geotextiles or geogrids, to enhance the stability and integrity of the installation. Thirdly, the design of the geomembrane system should consider the potential for ground movements and settlement caused by earthquakes. Adequate slope stability and drainage provisions should be incorporated to prevent water accumulation and potential damage to the geomembrane. Furthermore, regular inspections and maintenance should be conducted to identify any potential damage or weaknesses in the geomembrane system. Prompt repairs or reinforcements should be carried out to ensure the long-term effectiveness and durability of the installation in earthquake-prone areas. Overall, a thorough understanding of the local seismic activity, selection of suitable materials, proper installation techniques, and ongoing monitoring are crucial considerations for successful geomembrane installation in earthquake-prone areas.

The typical width of a geomembrane roll is around 20 to 30 feet.