A pond lining is an impermeable geomembrane used for retention of liquids, including the lining of reservoirs, retention basins, hazardous and nonhazardous surface impoundments, garden ponds and artificial streams in parks and gardens. Pond lining is one of the most common applications for geomembrane use. Advanced test methods allow for the smallest holes to be detected to truly achieve a perfect containment system. Nilex offers advanced geomembranes that can be used as a primary containment barrier for high temperature liquids and provide outstanding chemical compatibility. We provide geomembrane liner installation, design assistance, fabrication and construction services for containment applications.
Pond lining need to be protected from sharp objects (for example, stones) below the liner and from being punctured by any objects in the water body. Protection can be provided with layers of sand, geotextiles (particularly needle-punched nonwovens) and other materials. Pond lining are manufactured in rolls or accordion-folded on pallets. When deployed in the field their edges and ends are overlapped and seamed together. Methods are thermal fusion, solvents, adhesives and tapes.
The edge of the pond lining is generally rolled over the top of the soil slope and secured in an anchor trench or it can be fixed to a vertical wall made of wood or concrete. Box-shaped pond lining can be made for rectangular structures. The vast majority of flexible pond lining (aka, geomembranes) are available commercially and are manufactured using the following polymers; HDPE, LLDPE, fPP, PVC, EPDM. They can also be manufactured with a fabric scrim between two plys of the polymer, e.g., PE-R, CSPE-R, fPP-R and EPDM-R. Geomembranes can also be made in-site by spraying a polymer (polyurea, or equal) directly on a geotextile substrate. The lifetime of these various ponds linings depends greatly on whether they are exposed or covered.